'82 cb650sc project

[kerryb]

I'm back on this project after getting involved with and finishing several others. I'm happy to report the starter clutch replacement went off with few issues thanks to a how-to by Jaccob Gamble. I strayed from the writeup a couple ways (for me) because I could, and I don't like trying to work upside down in the bottom of the engine. So I removed the engine and put it on an engine stand so I could rotate as needed.
As suggested by jacob gamble in his excellent writeup, I got a new/used starter clutch from an '84 honda 125 ATX, it looks new, and is an exact match.
Next, I am mocking up the whole bike to finish the airbox, filter holder, and wiring changes. The headlight I plan to use is a bottom mount Harley unit that has no provision for wires inside it. Hopefully the wires that were in the bucket will fit in the tank tunnel and under the seat.
The seat fiberglassing and hump are finished by my co-builder. I hope to see them this week, stay tuned...
Pics upon request...

[kerryb]

Here's a couple pics for progress
Seat hump needs work. Red air filter element is for a mercedes sedan because the size was good to hide under the seat. Going back to stock headlight to contain the wiring, the changes required weren't worth the extra effort! The "snorkle" for the air filter will be done soon.
Is this forum still active?

[Volker_P]

Interesting air filter setup.
I assume you want to use the stock black air distributor box as it is still mounted in place or do you want to modify that, too?

Is this forum still active?

Well, I'm still here.
I guess many people still use the forum to look up technical stuff.
But new posts are quite rare.
It appears quite similar in other motorcycle forums that I know, too.

[kerryb]

Too bad the traffic isn't there, I'll try to keep this thread up to date till it's finished.
Yes, the stock air distribution box seemed the best way to avoid carb issues, but the the stock filter spoiled the the "look" of the open triangle. The plan is to hide the filter under the seat and duct the filtered air to the distribution box up high with a homemade "snorkle". It is an experimental design to satisfy two camps; the "look", and the wisdom of not using pods to get it. It's all part of the adventure. I tried pods already, didn't seem like a good trade-off.

[kerryb]

A little more

[Volker_P]

Probably not that easy to get the snorkle in shape and position like that.
I think I see a drain tube. Also the head cover vent may be connected easily.
Looks really good.
As the CV carbs are not that sensitive to the air side I guess there is a good chance it works fine, too.

[kerryb]

The "snorkle" started out as a foam block, wrapped in fiberglass cloth (6oz.). To keep one side flat it was clamped to a flat board to create a flange to bolt it to the filter holder. The fiberglass formed over the air distribution box was a way to solve the flexible connector problem. We'll see how well it works when it does. I already have ideas for the new-improved version if there ever is one.
Your comment about the cv carbs being less sensitive caught my attention. The reason for the filter and "snorkle" was to maintain some control over how much air is permitted to enter the carbs. This was done to keep some pressure differential so the "constant vaccuum" (cv) carbs would still operate as designed.
As for the vent tubes, the idea in my head was to gather them together and let them drain to a collection bucket taken from a goldwing. This could be drained periodically. I look forward to firing up the motor to see if my assumptions are even close to what i need!

[Jimcg]

Looking good! Fun to see and be able to follow your project.

/Jim

[k f m n]

i peek occasionally, keep posting.


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[kerryb]

I got a little more done, getting close to be being able to ride it in mock-up to see how much I like it!
Battery box and starter solenoid mount is done, I think.
Electrics tray under the hump might be done, changed it twice already! Voltage regulator has been moved to the underside of the tray to give it airflow. new fuse box arrived for blade fuses, that will be on top of the tray. Seat removes with two wingnuts for easy access to fuses. One three prong connector will need to be unhooked (tail light) to remove the seat completely in two minutes.
Tabs added for mini turn signals on rear hoop, just need to pick some. final welding and cleanup is still to be done.

The original fuse box off the handlebars isn't cut up yet, it's in good usable condition. I would be willing to sell it for the price of a connector and wire to replace it.

[Volker_P]

No compromises: I see solid material everywhere.

[kerryb]

Thank you, I'm doing my best work because some day I'll be the PO. I want to be proud of that.

[kerryb]

I dragged the bike outside to get some pictures in the sunlight. Plus, I needed a place to upload some pictures so I could download them to my tablet! I know, there is a better way, but I don't know it.
I've decided to keep the air system in the forks for now, any suggestions for an air hose upgrade (is that even a thing)?
The gauges came from ebay for an 80's cb750, Ibought them for the white face and the ratios are correct for this bike.
I'm very pleased with the results on the taillight so far, it is super bright with both brake and tail LED'S
The controls came from an '83 goldwing. It was the only set I had that routed the clutch cable in an acceptable position without interference. I also like having the choke as a lever in easy reach.
Planning a row of LED'S in a polished alloy panel to cover the original fusebox bolts and be the idiot lights.

[kerryb]

My seat pan has a steel skeleton glassed into it to utilize the original front mount tab , two half-round feet to grip the top rails, and studs welded in to accept wingnuts through the frame cross member. there is even a lip glassed into the hump to let it sit directly on the rear hoop. strong enough to sit on the hump! It goes on and off easy with a solid location when it's on. Just needs a lot of cleanup before paint and upholstery.

[tiagoba21]

Here's a couple pics for progress
Seat hump needs work. Red air filter element is for a mercedes sedan because the size was good to hide under the seat. Going back to stock headlight to contain the wiring, the changes required weren't worth the extra effort! The "snorkle" for the air filter will be done soon.
Is this forum still active?

Just joined the forum. working on the same bike. Did I miss the handlebar change? I'm looking at some clip-ons for my 82 c650sc but the only way I've seen done so far was from below the triple tree. Which clips did you use? Can the uppers just be moved up higher or is that what it looks like when you take all the instrumentation off? I guess I'll find out the second portion of that question soon on my own.

I also just recently found these risers. But they are 1" dia. https://www.jpcycles.com/product/214-21 ... 1-7-risers.