Author Topic: 72 CB500 Restomod - *Update* Sold!  (Read 47511 times)

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Offline Scramps

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Re: 71 CB500 Restomod
« Reply #250 on: October 09, 2018, 08:13:27 PM »
So, as predicted, I have been unable to stop fiddling. I've added some reducers to my pipes, which take it down from 2.5" to 2" pipe. I bolted in some circular plates with holes drilled to disrupt the exhaust flow. Added some 8" long chrome exhaust tips with a rolled end, and installed a baffle in each of those.

All of this, for a 6 decibel decrease in exhaust noise.

I'm idling at over 90 decibels, and anything over 4000 RPM pushes 105+/- decibels.

Part of me loves the F1 car sounds as I wind it out, but the other part of me has a strong desire not to be a dick to my neighbors.

I feel like I've done as much as I can with the slapdash custom exhaust mess that I'm running now.

A couple of questions for which I haven't been able to find adequate answers:

- These bikes aren't supposed to be this loud, right?

- What sort of exhaust system should I aim to buy to obtain a reasonable noise level?

Loving this bike. I grow more and more attached every time I get to ride it.

Offline Scramps

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Re: 71 CB500 Restomod
« Reply #251 on: October 15, 2018, 02:32:33 PM »
My 500 has turned into a 250.

Seems to be only running on 2 & 3, based on exhaust pipe temps. Found some loose wires going to the coils, but they didn’t fix anything. Double checked fuel flow, seemed a little restricted on one side.

Ugh.

Found a melted connector going to my regulator/rectifier. It did not appear to be shorting yet, but I definitely need to fix it.

Offline Pan1cReaper

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Re: 71 CB500 Restomod
« Reply #252 on: October 15, 2018, 06:28:38 PM »
From the factory they were pretty quiet. Delkevic makes a decent quality stainless system that’s well baffled. Not as quiet as stock, but very polite in decibels.

The Delkevic is awesome for the price. After a couple years it has turned a nice golden color on the head pipes and fades to the shiney stainless on the collector. Nice rumble at idle, and screams reasonably at WOT. I have tried it without the baffle. As much as I like the sound its obnoxiously loud.

Offline Scramps

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Re: 71 CB500 Restomod
« Reply #253 on: October 18, 2018, 05:47:51 PM »
Rode to work yesterday, ran just fine in the morning, back to 2 cylinders for the ride home. I swapped some different plugs into it the night before, I guess they ran okay until they fouled.

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Re: 71 CB500 Restomod
« Reply #254 on: October 24, 2018, 05:35:54 PM »
Finally got a few minutes to play with the bike this evening.

Swapped the coils, no change. Next suspect was the ignition timing, which I found to be a little off for 1-4.

Made the adjustment and it seems to be running like a champ again for the moment.

If I get an opportunity to ride soon I’ll report back with my findings

Offline Scramps

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Re: 71 CB500 Restomod
« Reply #255 on: October 25, 2018, 02:32:21 PM »
Went out for a quick blast down the road and back this evening. Weather’s probably as good as it’s gonna get for a while. Bike runs great! I can let it rest for the winter without stressing over it now.

Offline Scramps

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71 CB500 Restomod
« Reply #256 on: November 02, 2018, 04:58:28 PM »
Starting to put together a list of items to attend to over the winter. Several of the things that are on the bike now were rushed in the interest of getting the bike on the road as fast as possible.

The first thing is getting that tank painted. I've had a few people tell me that the primer gray look is cool, but no, it's gotta go. Still waiting on those replica side covers. I guess the company that makes them is another casualty of the Sino-American trade war. NOS ones are painfully expensive, and all the used ones I've found have either been in worse shape than what I've got, or unrealistically priced. The ones I have can probably be rehabilitated with some effort, we'll see.

Next is building a new wire harness. I had to cut and splice and solder and heat shrink this one an unnecessary amount of times with all the trial and error. I had to use a lot of scrap/salvaged wire in the interest of saving money, and I also used heavier gauge wire than necessary for a lot of the switched power and grounds, which in and of itself isn’t a problem, it’s just bulky and unattractive.

I’ve had a couple of my little baby plugs partially melt, probably due to bad crimps and arcing.



I’ve replaced the melted ones, but I want to redo the rest as well. Once I was done with the my current wiring setup, I got a fancy German-made crimping tool that does a far superior job than the needle nose pliers I was using before (ugh). That should help on the next go-round.



While I'm at it, I'll make up a new electrical box to go under the left side cover, I'm not thrilled with how the one I made before turned out.

Still angling for that Delkevic 4-1, haven't been able to set the funds aside yet.

I neglected to move the needle clips back to a leaner position the last time I had the carbs off, so that's another little thing.

There's probably about 10-12 more items that I'll fart around with over the next few months. I'll keep you posted
« Last Edit: November 04, 2018, 02:32:30 PM by Scramps »

Offline Gurp

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Re: 71 CB500 Restomod
« Reply #257 on: November 04, 2018, 05:35:08 AM »
Wintertime blues.
Scramps i hope you have a heated work space my friend.
slow Progress 74 cb550.

Poor boy chop 73 CB500 chop

Future project 77 Cb750 Amen Savior

Offline Scramps

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Re: 71 CB500 Restomod
« Reply #258 on: November 04, 2018, 02:38:12 PM »
I don’t actually have any sort of heating apparatus in my garage.

I may try to get my bike into the shop at work on a warm day and piddle with it on nights and weekends when I have time. That wasn’t an option for me last winter since I don’t have a trailer and I didn’t get the bike on the road until just a month or two ago.

We shall see how it plays out, I reckon

Offline Marissa

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Re: 71 CB500 Restomod
« Reply #259 on: November 04, 2018, 06:36:45 PM »
Scramps,

There's a guy in New England who makes new side covers. I got referred to him by a CB750 builder and ordered a set of 550F covers for my bike (since they fit into the frame triangles, they don't hit the inside of my legs which is mega bonus for me since I'm pretty short.) I think my order only came to $88 for both which I believe is cheaper than the ones you can find on 4into1 or Dime City, the covers are also pretty strong and flexible. Let me know if you want me to grab the link to his site!

Best of luck on your winter to do list also.
1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

Instagram- marissasimos

Offline Scramps

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Re: 71 CB500 Restomod
« Reply #260 on: November 05, 2018, 05:43:56 PM »
That would be incredible! I think the ones on 4into1 are about that price, which is what I was expecting to pay anyway.

Offline Scramps

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Re: 71 CB500 Restomod
« Reply #261 on: November 18, 2018, 07:38:53 PM »
I'd been holding out hope that we might get another warm enough day for riding, and today was the one. I made it to work and back, but the bike wasn't having it. 1 and 4 not firing properly, just spits and coughs. In any event, the time has come to start on my list.

I ordered the wiring harness supplies that I will need yesterday. Tonight after I got home I began the process of taking everything back off of the bike.

I moved my needle clips back up to the 2nd position from the top, and made some other little adjustments to the carbs that I had been putting off.

The tank is off and drained, ready for painting.

Electrical panel under the side cover, I think I might do something different for it.

Still contemplating. Plenty of cold days ahead.

Offline Scramps

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71 CB500 Restomod
« Reply #262 on: November 20, 2018, 11:06:22 AM »


Made a couple modifications to the original bracket for the gauges, now it will accommodate my little baby gauges AND the ignition switch in the middle. Almost definitely has been done before but I felt pretty clever when I figured it out

Edit:  I may go back later and put my dummy lights on there, too. Clean up the dash a little

Offline Scramps

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Re: 71 CB500 Restomod
« Reply #263 on: November 20, 2018, 05:21:47 PM »
WIP this evening

 

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Re: 71 CB500 Restomod
« Reply #264 on: November 20, 2018, 06:02:38 PM »
Doesn’t look half bad with those little baby gauges


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Re: 71 CB500 Restomod
« Reply #265 on: November 21, 2018, 05:49:15 AM »
Yes! I’ve been having trouble sourcing some of the more specialized bits of hardware, though. Rubber isolation grommets, battery cable boots, a few other little odds and ends that I can’t think of right now. I’ve found listings for stuff on eBay and amazon and whatever, but everything’s either way too big, too small, or the listing doesn’t specify any dimensions.

Any recommendations?

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Re: 71 CB500 Restomod
« Reply #266 on: November 21, 2018, 09:19:08 AM »
I like the little collets that Honda used for the grommets on the junction plate, I reckon those would be easy enough to reproduce with a bit of steel tubing of the appropriate diameter.

I’ll pick up some grommets and p-clamps later. I haven’t given up on the cable boots yet. I’ve got one good one left of the originals.

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Re: 71 CB500 Restomod
« Reply #267 on: November 22, 2018, 05:12:32 AM »
This is what I want to do with my paint. The tank will have a white honda decal about where the original emblem resided, and the side covers will have the original 500 Four emblems on them.

I've agonized over this for a long time, but I feel pretty good about it. Here's hoping that it looks as nice in real life as it does in my brain.

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Offline Can550

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Re: 71 CB500 Restomod
« Reply #268 on: November 22, 2018, 08:45:48 AM »
This is what I want to do with my paint. The tank will have a white honda decal about where the original emblem resided, and the side covers will have the original 500 Four emblems on them.

I've agonized over this for a long time, but I feel pretty good about it. Here's hoping that it looks as nice in real life as it does in my brain.

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oh I love this paint scheme.
I have been wanting to do this past by scheme on my 1975 cb550f but haven’t been able to decide if it will be right move. Would like to see how red and white will look?

Just to satisfy myself (for paint scheme) bought a 69 cb350 twin



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Re: 71 CB500 Restomod
« Reply #269 on: November 22, 2018, 08:52:01 AM »
I love that 350. A friend of mine had a lead on one before I got my 500. I got very excited about the prospect of getting it, then he found out that the guy who had it didn’t want to sell.

My Suzuki is red, as well as my corolla, I thought gold would be a nice change of pace.

Forgot to mention, I’m also painting the headlight bucket to match.

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Re: 71 CB500 Restomod
« Reply #270 on: November 22, 2018, 08:56:38 AM »
I’ve been going back and forth on the tank logo, trying to decide if it would look better with just “Honda” on there, or a nice white wing, kind of like the one on that 350.

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Re: 71 CB500 Restomod
« Reply #271 on: November 22, 2018, 09:06:41 AM »
"Why not both?"

I agree, cal, the "Honda" is much neater, which is the overall aesthetic I'm going for.

Also here's a red version for fun

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Offline Can550

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Re: 71 CB500 Restomod
« Reply #272 on: November 22, 2018, 09:09:21 AM »
Well if you want to use original Honda wing and name then consider a tank off cb350 of that era. There are indents on tank to accommodate these badges unless you want to put decals of same look


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Offline Can550

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Re: 71 CB500 Restomod
« Reply #273 on: November 22, 2018, 10:07:59 AM »
Calj How about 350f tank on cb550f?


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Offline Scramps

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Re: 71 CB500 Restomod
« Reply #274 on: November 23, 2018, 09:11:00 PM »
I made a thing.

The plastic one from an earlier post was a mock-up, to get an idea of how I wanted to position things.

I’ll probably take it to my day job shop on Monday so I can get some paint and primer on it in a warm, dry environment. The tank, side covers, and headlight bucket are going to the body shop Monday also, so that’s exciting :D

Hey, three cheers for grommets, by the way. My build was sorely lacking in grommets.