Author Topic: Two 550's and a 500. Home stretch now (Read 47749 times)

2strokeTrush · « **Reply #275 on:** September 18, 2015, 01:39:37 PM »

Got the new petcock in but it's doing the same thing, only this time with a odd twist. In the first picture you can see both lines are full. But the right one will run out and quit flowing while the left stays primed. If I take my finger and pull on the line around the petcock fitting nipples some gas will shoot out between the line and the petcock and send a full Line of gas flowing down it as fast as the other line. Only it will use it up while riding and then again the left side will go dry.

So what do I do now I don't understand this. Possible fuel line issue? The lines are not pinched anywhere. But as soon as I " crack the line" a little and gas squirts out between the petcock fitting and the line it primes the line right up.

Desert Dan · « **Reply #276 on:** September 18, 2015, 02:35:59 PM »

I haven't read entirely through your build so I don't know all the things you have done to the fuel system, but because one side is always going to have a stronger stream than the other you have to make the flow to the carbs as unblocked as possible for the weaker spigot. Make sure there are no kinks or really tight bends in the line, also if your'e using in line filters those can hamper fuel flow. Next I would check the tank make sure it's clean and fill it full of gas to put more fuel pressure in the system, afterwords leave the cap open while it runs and try switching between the reserve and on position and see how that affects the fuel flow. On my CB500 the left petcock spigot flows allot less then the right side and will act funny when the tank gets low or if the line gets pinched.

2strokeTrush · « **Reply #277 on:** September 18, 2015, 03:10:28 PM »

As of right now both lines are staying primed, not sure what's up with that. Rode about 10 miles locally today with no front breaks! I will work on them tomorrow and a fresh Avon Road Rider is being installed to.

Stev-o · « **Reply #278 on:** September 18, 2015, 03:11:33 PM »

No front breaks? How did you brake it?! C'mon man!

grcamna2 · « **Reply #279 on:** September 18, 2015, 03:17:59 PM »

Quote from: Stev-o on September 18, 2015, 03:11:33 PM

No front breaks? How did you brake it?! C'mon man!

Tyler,
the fronts are your Main stoppers;using the rears alone can cause you to slide-out but even if you use the front alone you'd be good.Get that front back on there.

2strokeTrush · « **Reply #280 on:** September 18, 2015, 05:25:40 PM »

I know I know it was mostly small back roads and I kept it slow. Worried about this stupid fuel issue. Did it to me again on the way home tonight, starts popping and bogging from lack of fuel and I have to let it fill back up

grcamna2 · « **Reply #281 on:** September 18, 2015, 08:00:05 PM »

Quote from: 2strokeTrush on September 18, 2015, 05:25:40 PM

I know I know it was mostly small back roads and I kept it slow. Worried about this stupid fuel issue. Did it to me again on the way home tonight, starts popping and bogging from lack of fuel and I have to let it fill back up

I guess you Must know riding dirt bikes

seanbarney41 · « **Reply #282 on:** September 18, 2015, 11:44:20 PM »

Tyler, make sure bowl vents are clear....and gas cap vent too.

2strokeTrush · « **Reply #283 on:** September 20, 2015, 05:19:34 AM »

Quote from: seanbarney41 on September 18, 2015, 11:44:20 PM

Tyler, make sure bowl vents are clear....and gas cap vent too.

Both are clear and gas cap seal is new. Its the weirdest thing, If i move the line on the petcock to allow air in it will start flowing great and fill right up, but then start to bubble out on the nipple where I let the air in. Left side flowing great no issues. There has to be a fix for this its ridiculous that this is holding me up and nothing is working.

2strokeTrush · « **Reply #284 on:** September 20, 2015, 05:26:35 AM »

Did manage to ride a little yesterday. Would be great if I didn't have to worry about the fuel issue though. Got the matching Avon Road Rider mounted and installed. No speedo as of right now the screw that hold the cable tight is stripped out beyond belief and the remnants of a old cable now stuck on the drive. I will try to Dremel in a flat spot for a flat head screw driver and see if that works.

grcamna2 · « **Reply #285 on:** September 20, 2015, 09:55:01 AM »

it maybe could be the floats or float valves hanging-up/sticking a little? have you tried tapping lightly on the carb. bodies to see if that works? front brakes looks good

2strokeTrush · « **Reply #286 on:** September 22, 2015, 02:50:45 PM »

Quote from: grcamna2 on September 20, 2015, 09:55:01 AM

it maybe could be the floats or float valves hanging-up/sticking a little? have you tried tapping lightly on the carb. bodies to see if that works? front brakes looks good

Did this but no help yet.

2strokeTrush · « **Reply #287 on:** September 22, 2015, 03:02:52 PM »

Well as of right now the bike is ridable. When on the kickstand there is less fuel in the left line but not 100% empty. But must suck more when riding because it doesn't seem to affect the bike. We do have a stumble until about 6k in First Second and Third gear, Honestly once you get into fourth and fifth there isn't much power and to keep her moving you really have to twist that throttle. I know its not a rocket but even my 350 would move in 4th and 5th. Could this be a jetting issue?

Went ahead and replaced the dim lights in the gauges with some Blue Leds BA9s, not as bright as I would have liked, I have some more in plain white I'm going to see if those are any brighter, might as well replace the dash with LEDs while I'm at it.

Remember the other 550 that I originally took the motor out of for this project?? Well here is that bike, only with the motor from the 1977 550 also included in the original deal. Since I am going away to trade school soon I'm hoping I can sell this and make a little extra money. I still have one 550 in the shop to mess with so I really don't need this one. Besides the motor its a 1974. If anyone has a spare Airbox to Carb boot ( long type ) I really need one!

2strokeTrush · « **Reply #288 on:** September 27, 2015, 05:44:25 AM »

Well the break in period is just about over, Turned over 100 miles yesterday since the rebuild. Im going to change the oil and spark plugs and then re-tourque the head. The fuel issue I was having still presents itself every once in a while and I honestly don't know what to do about it now. the bike will start to loose power, backfire, and pop and sputter. Ill pull over and watch the fuel in the line fill back up, and then I'm good to go usually for the rest of the ride. Before I leave for school my family and I took a Vacation to the Outer Banks for a week and I knew I would have to bring the bike!

So I figured it wouldn't hurt to check the Nags Head Craigslist and such, and came across this little gem. 1971 350 twin, mostly complete but needs a titles frame ( This frame is trash anyway ) and then the seller throws in a titled 1971 cb500 frame for free. Walked away with both for 200$ The 350 has the nicest original tank i have ever bought. If anyone has any parts for a 350 they want to get rid of let me know!

Restoration Fan · « **Reply #289 on:** September 27, 2015, 11:52:04 AM »

Quote from: 2strokeTrush on September 27, 2015, 05:44:25 AM

If anyone has any parts for a 350 they want to get rid of let me know!

Once you know what you need, post a list. I actually have a few 350 parts that were in the boxes of stuff I purchased for my 500 & 550 build.

RAFster122s · « **Reply #290 on:** September 27, 2015, 05:30:41 PM »

If your tappet covers show any signs of the tappet adjuster screw hitting the cover. Worn rocker shafts can allow excessive movement of the shaft. The shaft wears an eccentric into the cover trashing the cover, tappets/rocker arms and the camshaft.

2strokeTrush · « **Reply #291 on:** September 27, 2015, 07:05:41 PM »

Quote from: RAF122S on September 27, 2015, 05:30:41 PM

If your tappet covers show any signs of the tappet adjuster screw hitting the cover. Worn rocker shafts can allow excessive movement of the shaft. The shaft wears an eccentric into the cover trashing the cover, tappets/rocker arms and the camshaft.

Thanks for the heads up, but it's not ticking anymore

bryanj · « **Reply #292 on:** September 28, 2015, 12:14:23 AM »

Two things for the 350

(1) there is a centrifugal oil filter under the circular cover on the RH side of the engine which people rarely clean and it can oil starve the cam

(2) NEVER thrash the motor from cold as it tends to shatter the piston rings

2strokeTrush · « **Reply #293 on:** September 28, 2015, 09:04:42 AM »

Quote from: bryanj on September 28, 2015, 12:14:23 AM

Two things for the 350

(1) there is a centrifugal oil filter under the circular cover on the RH side of the engine which people rarely clean and it can oil starve the cam

(2) NEVER thrash the motor from cold as it tends to shatter the piston rings

Thanks man I didn't know about the filter!

bryanj · « **Reply #294 on:** September 28, 2015, 10:49:51 PM »

You ain't the only one mate, repaired many trashed 250's in UK (same bike with smaller bore to meet the UK "Learner laws" of the early 70's)

If the link works it will show you the filter assembly which is bolted to the crank, when you refit the cover make sure you get the oil hole(s) in the right place.
http://www.motogrid.com/p/OEM-Parts#/Honda/CB350K3_A__MOTORCYCLE%2c_JPN%2c_VIN%23_CB350-3000001/OIL_FILTER_%2b_OIL_PUMP/CB350K3-JPN-A/2Y133440AE13344009A

2strokeTrush · « **Reply #295 on:** October 05, 2015, 05:59:30 PM »

Had a good time with the bike in the Outer banks, riding across all the bridges that cross the massive sounds was a blast. Got lots of thumbs up and questions at the gas stations. Makes you feel good about the hard work and on time this bike took!

And loaded both bikes up but caught the rain most of the way home:(

But after riding it this week she started to leak around the left side of the head gasket. Pretty decent mount of oil coming out, so the typical Napkin between the fins will have to do for now....

Also leaking around the gasket on the oil pan, Easy fix, I wanted to see what we had in there anyway. Still looks good in the driveway!

RAFster122s · « **Reply #296 on:** October 05, 2015, 10:32:17 PM »

I love the Outer Banks, usually I would stay south of Frisco and north of Hatterus and Ocracoke was a cool little island with lots of cool things. Old Coast Guard sstation wiped out in Hurricane on the northern coast of Ocracoke Island was cool to go shell searching and the ferry trip was cool. The ponies on Ocracoke as well.

Very nice find on the 350. Vibration is an issue for long rides. A good pair of gel grips help a little.

Glad you had fun and are enjoying the bike. Sounds like it is time to retorque the head to see if your oil lesk goes away.

David

2strokeTrush · « **Reply #297 on:** October 13, 2015, 05:04:35 PM »

Well guys he bikes still leaking oil:( I'm going to replace the pucks under the valve cover because I saw they were old looking when I tightened the head back down. Also going to replace all other gaskets underneath there while I'm in there.

Something strange started happening though, after the bikes running and I shut it down Its starts loudly " gurgling". The sound is coming from under the airbox lid. Anyone have a idea what this could be and if I need to be worried?

RAFster122s · « **Reply #298 on:** October 13, 2015, 07:59:30 PM »

The damp weather may have condesate pooled in the air box. There is a valve in the bottom of the drain hose you squeeze it to open. It will close when released, provided that you have the stock drain hose with the valve. It is a bigger diameter, one clue it is there...

2strokeTrush · « **Reply #299 on:** November 10, 2015, 08:10:50 AM »

Doing good in trade school so far guys, been riding as much as possible. Freakin oil leak drive me crazy so I tore the valve cover off to inspect and found the shop that did the top end job for me never replaced the pucks.....

So I did and replaced the cover gasket, but in the process broke off the tack drive and couldn't get her out, well one advantage of going to a state of the art trade school is a fully functional machine shop on site and they got it out for me no problem! As is well:)

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Author Topic: Two 550's and a 500. Home stretch now (Read 47749 times)