Author Topic: CB550 Gulf road race build 592cc  (Read 80879 times)

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Offline SOHC4 Cafe Racer Fan

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Re: CB550 Gulf road race build 592cc
« Reply #300 on: January 20, 2020, 04:18:00 PM »
[edit] Also also the bolts on the clip-ons contact the tank so I don't know what I'm going to do about that. I have the DCC billet top tree so I can't mount any handlebars in the stock location. Any suggestions?
Contact Cognito Moto and order a set of custom triple trees with more offset. That will move the forks slightly forward and reduce the conflict. They will be milled from billet aluminum, so you could have them anodized to match the frame, or powder coated.

Another option (certainly cheaper) is to switch brands of clip-ons to a style where the pinch bolts are less obtrusive.

Restoring the larger, stock offset will also give you better handling.  The smaller offset from the modern triple trees will otherwise give you the sensation that the bike is falling into corners.
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Offline MRieck

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Re: CB550 Gulf road race build 592cc
« Reply #301 on: January 20, 2020, 06:00:53 PM »
[edit] Also also the bolts on the clip-ons contact the tank so I don't know what I'm going to do about that. I have the DCC billet top tree so I can't mount any handlebars in the stock location. Any suggestions?
Contact Cognito Moto and order a set of custom triple trees with more offset. That will move the forks slightly forward and reduce the conflict. They will be milled from billet aluminum, so you could have them anodized to match the frame, or powder coated.

Another option (certainly cheaper) is to switch brands of clip-ons to a style where the pinch bolts are less obtrusive.

Restoring the larger, stock offset will also give you better handling. The smaller offset from the modern triple trees will otherwise give you the sensation that the bike is falling into corners.
I agree....it would be very beneficial. Yoshima did this with the original 900RR's with his triple clamps and adding a 17" 600F front rim improved things even more. I did a few of those when I had my shop.
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Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #302 on: January 22, 2020, 03:05:16 AM »
The offset is still the same as stock. I'm using the stock bottom clamp with just the top aftermarket clamp. I will look into Cognito later one when I'm settled in my new place. Unfortunately I don't have much time to make any changes that would require disassembly, fabrication, etc. I'm leaving the island in about 10 days.

Spent my day off on Monday in the garage. Did about 12 hours total. Got the clutch assembled and installed. Then I spent about 3 hours organizing my parts boxes then tearing the garage apart looking for the crankcase and oil pan gaskets. Couldn't find them. They're not in the big Vesrah pack of gaskets (head gasket is still in there but everything else is missing), they weren't with my bag of seals. Now I need to order them and they're almost certainly not going to get here by Friday. Anyway, I was planning on getting it all sealed up but that's not gonna happen yet. I also spent several hours grinding off powdercoating from various mounting surfaces, gasket holes, and basically anywhere where something would go through or where tolerances are tight. I wholeheartedly regret working with the guy I did. Not only were things powdercoated where they shouldn't have been, but it was pretty thick too with a base coat and a top coat.

In the morning I need to take my rear wheel back to the shop that mounted it because it was mounted backwards. I marked the forward direction correctly on the inside of the rim, and they marked it on the outside in grease pencil. The direction of rotation indicator on the tire points the opposite direction. Luckily I'm not super crunched for time while I"m waiting for my order to show up, it just means I can't relax before work.

Saturday I plan on getting everything wired up with my dad, including HondaMan's transistorized ignition. I don't foresee any issues with that, but with my luck...

Another teaser, not much has changed except engine covers are (temporarily) installed.


Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #303 on: January 22, 2020, 12:37:13 PM »
Got the tire fixed. I'm unsure if I marked the rim incorrectly of of they messed up. I asked but got a a pretty vague answer so I'm still really not sure.

Also who knew it would be so hard to get a chain locally? Only shop that has a 530 non o-ring is a tuning shop and they only have a 180 link one they use on their extended swingarm drag bikes. They all understand when I explain that it's for an older bike and that's what parts books are for lol.

Anyway, I need to replace my sprockets anyway so I'll likely upgrade to a 520 o-ring kit later on. Will still need to order a cheap 530 in the meantime though :(

Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #304 on: January 24, 2020, 08:30:54 PM »
Finished the carb last night. Had to go to the auto parts store to buy a huge pack of assorted o-rings. The ones on the barbed tee for the fuel inlet had shrunk and gone hard. Had to reassembly like four times because I kept finding pieces I forgot. Last time was for the little thingy that goes in between the center two cards to hold one end of the throttle return spring. Then one last time for realsies to that piece in the loop of my Home Depot throttle return spring. I had clear 5.5mm fuel hose from several years ago so I have brand new fuel lines. I wish I had also bought 3.5mm hose so that I could replace the short hoses that go between the cards 1-2 and 3-4.

Got the brackets on for my Tarozzi rearsets. Couldn't figure out how the brake linkage went on. The only way I could get it mounted was if it was hitting a tab. turns out that tab has the brake linkage stopper thingy and that I was mounting it correctly. Spent like an hour googling it because I had no reference pictures. Will mount the pegs and linkages after the wiring and exhaust go on.

Gaskets and chain came in. It's already dark outside but I have a spotlight. I really want to get that done before tomorrow so all I have to worry about is the wiring.

If all goes well, I'll have it wired, filled with fluids, and ready to fire. That's a big if judging by how the rest of the build went.

Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #305 on: January 27, 2020, 12:49:28 AM »
It was indeed a big "if." This entire last stretch of the project has been so frustrating and exhausting and discouraging. For every one step forward, I need to take three or four leaps back, then sprain my ankle on the way back forward.

Got the gaskets on, not too much of a hassle. Installed the exhaust. Realized I had measured the location for the O2 gauge without a center stand on. If the bung clears, it'll be extremely close to the center stand when it's deployed. Then I realized I didn't install my oil filter. Went to install it and my Yoshimura-style exhaust has to be removed to mount the filter housing. Frustrating end to an already long day at work then in the garage. Was too tired to continue working so I left the chain for Saturday morning before my dad came out to help me with the wiring.
Despite being super tired and exhausted, I couldn't fall asleep til after 4am.

Woke up at around 1030 and didn't get out to the garage til about 11 and my dad was already out there. He had the harness all sprawled out and was marking each end of the wire so we knew what was what.
I got started mounting mounting the chain. Turns out the swingarm brace had been mounted too far left and the chain was riding against it. That shouldn't have been an issue because it was supposed to be exactly the same as the one my friend had built, and his fit perfectly. So off the chain came.
After fighting to get the harness in the right position in the headlight bucket, we discovered that we should've put the harness on the bike first, then into the bucket. Had to remove the top tree to get it in position.
It then dawned on me that I never bought aftermarket turn signals, tail light, handlebar controls, and we didn't fabricate a battery tray. So now we're stuck trying to mount stock turn signals without fork ears, rear turn signals and a tail light with no rear loop, and a battery that doesn't fit with the swingarm brace. Which he was checking the rear lightning wires for continuity, I think we discovered that the engine has some serious grounding issues. I have to confirm with him but if it is, it's likely the powdercoating. I know I ground down to bare metal at all the engine mounts (where the long bolts go all the way through), but not the triangle mounting brackets at the front and the black bracket where the clutch cable mounts. I don't know much about grounding but should I do any more grinding? What about a grounding strap?

I took a break from the wiring to focus on the front brake. A long time ago I bought shiny new stainless brake lines from Slingshot Cycle. I'm finally mounting them. I fought with the loose caliper to remove the bottom hard line. I fought with the loose brake junction to remove the brake lines from both sides. Turns out that's pretty hard when you can't hold it well. Anyway, I go to mount the brake junction to the bike. Doesn't fit because powdercoat is too thick and the bolt hole has powdercoat in it. Just my luck. 10 minutes of grinding and finishing later, I have the junction mounted. The hard line and bottom hose go on easily. The top hose, which was supposed to be a short hose for clubman/clip ons, felt too long? I don't know, but I had to fight with it for an hour to get it mounted between the guide thingies and also snaked through the wiring harness.
By this time it was already closing in on 10 hours in the garage and we were tired.

Today I had to work, but my dad went out and did some work in the garage. He cut a slot out of the swingarm brace for the chain. He mounted the front and rear turn signs. For the fronts he drilled holes into the side of the headlight bucket. They're still a little flimsy but will be braced some more later on. The rears were put the the holes in the frame where the brace is on the back. The tail light was mounted on a piece of steel stock and bolted to the brace in the back. It's ugly but it works. I don't think they're wired up yet, but at least they're on. That's the hard part.
Again, I wish I didn't have to rush this. If I wasn't leaving I would've ordered new lights and controls and fabricated a battery tray and probably remounted the seat and taking a loss on the "work" I paid for the first time.

I know I've said it before but I really hate having to rush this last part. Once I get settled in my new location I'll have the time to do it over right, but maybe not have the funds because that's how life works :(
I'm trying my best to extend my stay an extra week (I'm supposed to be leaving at the end of this week) so that I'll have a bit more leeway and at least one full weekend to get everything tightened up. That and I still have to pack and get my van shipped.

Reminding myself now to check the fork oil because one leaked out several years ago and I know I'm going to forget with everything going on. Oh and I need a petcock rebuild kit because the gaskets were flat and hard as a board.

Anyway, here's another progress picture. Still doesn't look like much has changed but it's nearly there. In the morning I'm going to get the cables routed, plugs in, then put some oil to check for leaks. If all is well then I'll fill it completely and prime it. I'll also be sure to check timing, valve adjustment, cam chain, and whatever other periodic maintenance stuff before I even think about firing the engine. That probably won't be til this weekend but I'm staying optimistic.


Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #306 on: January 30, 2020, 04:49:25 AM »
Have clutch issues.
Got the air side of the engine mounted.
Swingarm brace is more intrusive than I expected.
Battery is physically bigger than I would like.
Lazy seat mount "fabrication" is also a huge pain in the ass and interfering with the other fabrication we need to do.

Most of the assembly and wiring is done. Just waiting on a few odds and ends like the rear brake return spring and petcock rebuild.
Battery mount needs fabrication. We can fit it under the seat after some adjustment.
Need to wire in Hondaman's ignition.
Need a front and rear fenders solution for safety check.
Need to bleed front brake and ensure it's working correctly.
Oh, fork oil because I forgot from last time.

On the plus side I'm gonna have an extra week and a half or so. I won't be working during that time either so I might be able to tidy some things up that had to be rushed.

If all goes well (hahaha) then I might be able to fire this weekend and do a road test.

Offline SF

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Re: CB550 Gulf road race build 592cc
« Reply #307 on: January 30, 2020, 05:07:17 AM »
Good steady progress man!


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Offline Bankerdanny

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Re: CB550 Gulf road race build 592cc
« Reply #308 on: January 31, 2020, 02:58:25 PM »
Are you moving to the mainland or staying in HI?
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Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #309 on: January 31, 2020, 03:36:38 PM »
Moving to the Big Island from Oahu.

Helpful responses from the forum pointed me in the right direction for the clutch issue. Got in contact with the shop I got the kit from and it seems like they're going to get me the correct parts to make it work as intended.
Mad props to both.

In the meantime I do have other stuff to work on so it won't be at a standstill waiting for parts.

Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #310 on: February 02, 2020, 12:49:08 AM »
Got the battery mounted. Not the prettiest but it's secure and I don't need to buy or make any extra battery cables.

Assembled the front brake lines the other day and left the bleeder open to gravity bleed. It didn't. I spent like 30 minutes bleeding it with my vacuum bleeder. Works like a charm now.

Turn signals, tail light and horn are all mounted where they need to be and operate correctly.

Went to test the starter but it wouldn't turn. Heard the solonoid clicking but no bendix action. Did some troubleshooting. Had continuity from frame ground to engine, but turned the ignition on and lost continuity. Racking our brains to figure it out, but it ended up just being too much powdercoat between some of the engine mounts and engine. Spent a good two hours grinding that down and now it works like a dream.

Brake return spring and petcock came in. Both working as intended. I just need to figure out the correct adjustment for the brake side of my Tarozzi rearsets. Need to carefully mount the shifter side of my rearsets because the teeth on the rearset side of the lever ground down. Fast from the Past (the vendor I got it from) sells it, so I'll end up getting it and the shift lever rubber boot because mine is all torn up.

Tomorrow I'll be reassembling the clutch for the fifth time and hopefully it works. After that we just need to wire up HondaMan's ignition and the afr gauge. After that it should be all good to fire.

Offline MauiK3

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Re: CB550 Gulf road race build 592cc
« Reply #311 on: February 02, 2020, 09:07:40 AM »
Aloha from Maui
nice bike, looking forward to the completed project.
best of luck on Hawaii, we love visiting over there from here on Maui
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Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #312 on: February 03, 2020, 12:10:28 AM »
Thanks MauiK3. You've got a great looking bike as well.

Dad and I spent most of the day, starting at 11am, working on the last of the wiring. Wired up HondaMan's ignition, had to resolder the wires on the back of the ignition switch. Got the dummy lights connected (using stock dummy light handlebar clamp thingy ziptied to the top clamp. We got all the harnesses tightened up and verified everything works. Then it was time to wire up the wideband o2 sensor. Tried to thread in the sensor into the bung, but the guy that welded the bung cut a circular hole but the bung was at an angle so the hole is oval. Had fun grinding that out. Routed the cables as well as we could, but have lots of slack because it's meant for a car, not a bike. Gauge is just sitting there though because I forgot to get a gauge pod for it. By the time all was said and done, it was nearly 8pm. I tightened up various mechanical things like the clutch (still not sure if it's correct yet), getting the carb sync gauge hooked up and just doing spot checks for everything being tightened.

Filled up the fuel tank and mounted it to the side. Turned on the petcock and two of the carbs were puking fuel. Grabbed the rubber mallet and gave them a couple whacks and it stopped. It was time to try to fire it. First try was a bunch of backfiring and it sounding like it wanted to fire. We had fuel and spark.

I took a second to think of what could be causing that. Didn't check anything before I started second guessing my plug wires. I knew the firing order was 1 2 4 3 and I plugged them in like that. Or so I thought. Cylinder 3's plug wire always bothered me because I thought it seemed a bit too long. I rechecked the wires from the plugs to the coils and found that 3 and 4 were switched.

Second try. Without giving it any throttle, it would run as long as I had the starter pressed. Gave it a little throttle and it ran smoothly. Well, as smoothly as it could without any fine tuning to timing and fuel. Sounded like it was pinging (detonating). It was running very lean, about 16:1 of whatever unit of measurement that's supposed to be. I'll be looking into timing and jetting tomorrow.

I have the video but it was dark so I had to run at ISO 16000 so it looks pretty garbage. Will be editing out all the silly parts and uploading it.

Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #313 on: February 03, 2020, 01:38:54 AM »

Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #314 on: February 04, 2020, 09:36:59 PM »
Little bit of issues with timing and fueling. Got it mostly solved I think.

Took it out of the driveway and rode it down the street. It is QUICK. Very little throttle input and it's taking off so fast.

Fork was noticeably low on oil because I forgot to fill it again. Biggest reason was that the drain plug copper sealing washer was bad. Didn't have a new one. I ground it down and beat it back into shape and it sealed well. Didn't know how much oil I lost so I eyeballed it. Whoops. Overfilled it. Thought it would be fine and that I'd just need to drain it til it got down to a reasonable level. Nope. Blew out the fork seal. Unholy mess. Drained it but the copper sealing washer isn't sealing so I'm just going to order a big bag of them (6mm). Need to drive the seal back in but my homemade PVC seal drivers are too long to do it with the fork in the bike. I think I'm just going to cut them down and leave the fork on the bike. After that it should be ready for some road testing.

The sound of this thing is unreal, as well as how quick it is to rev up. I don't think I'll have time to get it on a dyno here so that'll have to wait til I finish moving.

This weekend we'll be rigging on a front fender and a rear splash guard. It should be ready for safety inspection after that. I'm gonna have to shove it in the back of my van but I think it should fit. 8ft of cargo space and it's only 7 feet long.

Offline Stev-o

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Re: CB550 Gulf road race build 592cc
« Reply #315 on: February 05, 2020, 06:57:21 AM »
Good to see progress on this!
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Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #316 on: February 06, 2020, 07:51:04 PM »
Thanks Steve-o. After having actually done most of the assembly, it wasn't that hard. Had I known that beforehand, I would've just done it and it would've turned out a lot nicer than it is now. Anxiety be like that sometimes.

I thought I was having timing/ignition issue. Turns out I wasn't. The electronic gauge I was using was actually the problem. It has a PPR (pulse per revolution) setting and by default it's set to 2 (meaning it reads as if there are two pulses, or ignition fires, per revolution). I don't know the specifics of it, especially without "wasted spark" ignition system, but that basically meant that it was showing double the actual RPM. That means I was looking at the timing (and advance) at 2400 RPM, instead of 1200 RPM. I was worried my advance springs were worn out and advancing at idle. That's not the case and I'm glad I didn't do any modifications to the spring yet.

Tomorrow I'll be working on the timing and idle speed to get it dialed in right. I think it might be too retarded to idle at the correct RPM, and I really hope that's the case.

With all the modifications, I'm not sure how it will idle at factory specs and timing.

I can't remember if I set the cam timing (I have an adjustable cam sprocket) to neutral or a few degrees advanced. I don't have the time to check and troubleshoot to find out. I'll get it running as smoothly as possible so I can get my safety inspection, then I'll work on anything that might cause downtime.

Offline MRieck

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Re: CB550 Gulf road race build 592cc
« Reply #317 on: February 07, 2020, 03:55:18 AM »
 The only thing I'd add is keep the idle up to maintain good oil pressure.......don't let it sit at 1,000 RPM for to long. That and put a fan in front of the engine. While I'm at it.....I'd synch the carbs first after a quick timing check.
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Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #318 on: February 07, 2020, 01:44:20 PM »
Good suggestions Mike. I did a quick carb sync when I first got the bike running and they were very close in specs, but I was more worried about keeping it running and it not exploding. I can pull out the gauges again since it's running more smoothly than before.

Unfortunately my front fender hasn't arrived on island yet, so I'm not sure if it'll be here in time to get it fabbed up for a safety inspection on Monday. Might have to rig one out of scrap metal or something.

Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #319 on: February 07, 2020, 08:05:28 PM »
Checked all adjustments before I fired it up and all seemed well.

Fired it up and it still has trouble maintaining a steady factory idle (even at the upper range of 1200). My digital tach is still having trouble showing a steady RPM too, it jumps around a lot. I'm gonna check the voltages or ohms or amperage or whatever of the coils to make sure I'm getting strong spark on all cylinders. I don't know if I'll even be able to get a steady idle with the work that's been done.

I did take it out on the road and kept an eye on the a/f ratio. Idle is about 12.5 (which after doing some more reading that might be too rich, I should be aiming for 13-13.5ish). Off-idle throttle input drops me down to about 8 and causes a big stumble. Still rolling on the throttle returns me to the previous a/f ratio. I think I'll first drop down to 40 slows (currently have 42s, previously had 38s which were too lean). That should get me closer to an ideal idle mixture. If I still have some off-idle stumble I'm going to mess with the air mixture screws. I haven't touched them at all so I believe they're going to be at the stock 1.5 turns out. Slide needle is at the stock #2 position and from what it feels like I don't need to adjust it quite yet.

Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #320 on: February 08, 2020, 05:40:35 PM »
Turns out 40 slows are the only jets I don't have, even though I'm supposed to. Sticking with 42s and will mess with the idle air screws. I have at least two fulls turns out of adjustment.

Mounted my afr gauge properly with a gauge pod. When I say properly, I mean I drilled and tapped the dummy light clamp thingy and screwed it into that, but the dummy light clamp thingy is zip-tied to the top tree clamp.

Put the stock air plenum back on because one of the pod filters I was using fell off. I had them on because I expected to be removing the carbs repeatedly. Replacing them with the air plenum in place is a huge PITA, even with brand new boots.

Having trouble with my Tarozzi rearsets' brake lever. Seems like it's binding when actuated so the brake sticks. I know it worked well before I had it apart but I can't figure out why it's binding now. The pivot hole for where the brake arm attaches is totally clean and lubricated.

I'll get some pictures of the nearly finished product soon.

Offline HondaMan

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Re: CB550 Gulf road race build 592cc
« Reply #321 on: February 08, 2020, 07:40:39 PM »
With 42 idle jets, turn the air screws inward about 25% about 1 to 1.25 turns out from stop). The mixture gets leaner when the screws are turned inward. Their total authority is between 3/4 and 2.0 turns, no further change in either direction beyond that.
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Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #322 on: February 08, 2020, 08:25:42 PM »
The mixture gets leaner when they're turned in? It's a 022A carb and the screw is on the air side of the slide, so that means it affects the amount of air, not fuel, right? So turning in should close off the amount of air and turning out should open up the amount of air?

Turns out my rough sync on first startup was just that, rough. Got them balanced and it definitely holds an idle much better, but I'm still running pretty rich. Getting closer to 13 but still hovering around 12.7-8.

Could the fact that I'm using a colder plug be an issue? Should I start with the stock D7EAs and see if I'm encountering the same symptoms?

[Edit] After doing a bit of reading, I agree that my idle is still a bit rich for extended idling, but my 1/4 and up throttles are right where they should be. Idling is fouling the plugs, but if I have a hotter plug that might help burn off the deposits? I'd be keeping an eye out for excessive engine temps and detonation. I'm only going off what makes sense on paper and that real-world conditions would have an impact, but I'm trying to get in the ballpark.
« Last Edit: February 08, 2020, 08:56:36 PM by Dimitri13 »

Offline MRieck

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Re: CB550 Gulf road race build 592cc
« Reply #323 on: February 09, 2020, 10:24:10 AM »
The mixture gets leaner when they're turned in? It's a 022A carb and the screw is on the air side of the slide, so that means it affects the amount of air, not fuel, right? So turning in should close off the amount of air and turning out should open up the amount of air?

Turns out my rough sync on first startup was just that, rough. Got them balanced and it definitely holds an idle much better, but I'm still running pretty rich. Getting closer to 13 but still hovering around 12.7-8.

Could the fact that I'm using a colder plug be an issue? Should I start with the stock D7EAs and see if I'm encountering the same symptoms?

[Edit] After doing a bit of reading, I agree that my idle is still a bit rich for extended idling, but my 1/4 and up throttles are right where they should be. Idling is fouling the plugs, but if I have a hotter plug that might help burn off the deposits? I'd be keeping an eye out for excessive engine temps and detonation. I'm only going off what makes sense on paper and that real-world conditions would have an impact, but I'm trying to get in the ballpark.
You are correct.....screws on the air side control air. Screwing out leans the mixture. I'd stick with the stock plug. Not sure what Mark is talking about.
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Offline Dimitri13

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Re: CB550 Gulf road race build 592cc
« Reply #324 on: February 09, 2020, 09:49:38 PM »
Spent most of the day fixing my fork seal fiasco. Had to hone the bore and shim the seal with a strap of nickel. Not a permanent fix but good enough to pass safety; no leaks.

Amazon really screwed up and the fender that was supposed to arrive on Thursday won't be arriving til Wednesday. We spent the rest of the day cutting up an old toaster oven tray and hammering it into a fender. Coated it with crinkle black ad bolted it to the Tarozzi fork brace. Ugly, but looks somewhat like a real fender from afar. Hopefully it's good enough to pass safety.

Forgot about the Tarozzi rearset brake lever not springing back. Will ask about that in Bikes and hopefully I can get it solved by the time I'm ready to leave for safety.