1979 CB750L. My first cafe/brat project. Denver Area

The Jimbonaut

Active Member
Yup, digging both those styling cues. The two-up seat looks great (and could work well with the lines of the rear subframe), and the hugger fender could definitely work too. For some reason I think having the fender end directly below the end of the seat hoop accentuates the gap between the two - I'd love to see how it looks with the fender tucked away more just as a comparison. Damn that fender's nice and shiny!
 

V10Pilot

Member
Jimbonaut said:
Yup, digging both those styling cues. The two-up seat looks great (and could work well with the lines of the rear subframe), and the hugger fender could definitely work too. For some reason I think having the fender end directly below the end of the seat hoop accentuates the gap between the two - I'd love to see how it looks with the fender tucked away more just as a comparison. Damn that fender's nice and shiny!
Jimbo, here are a few different amounts of tuck on the fender. I’m thinking tucking it in deep then making a small black or carbon fender about 3 to 4 inches attached under and sticking out from the rear hoop(see example). I’d need that little fender on the hoop to keep from getting water up my back if I tuck the chrome hugger too deep.


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V10Pilot

Member
Got my new valve clearance numbers after the rebuild and they are a little tight but still ok. I may ride this season and add it to the list for next winters work.

I also pulled the carbs back off because it’s not running right between 1/4 to 3/4 throttle. Starts to burble and lose power. A few carb experts are telling me it’s too rich so I’ve got a few genuine Keihin jets coming with a few sizes to do some testing. It has 68/102 now but when I do the idle drop procedure I’m ending up with pilot screws turned nearly 4 out and the plugs are sooty.

I also used this as an excuse to pull the started motor out and clean and re lube the shafts. There was a horrible noise coming from the started motor and now it purrs

I still and stumped on what to do about a seat and side covers. Those covers are hard to come by and everyone wants crazy $$$ for them if they aren’t cracked.


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cb250nproject

If you can make it better do so
.003 and .004 might cause you some dramas, better to be loose than tight. I bent an exhaust valve from not having enough clearance. But if it’s already running maybe she’s all good.
I’m digging that rear fender looks mean.


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V10Pilot

Member
I’ve been so busy with work, this project has slowed more than I hoped. I got a few sizes of jets and I’ll start with the 98s to see if that helps the burble and sooty plugs.


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pidjones

Active Member
Cracked side covers are easy fixed with ABS plumbing cement and a little fiberglass cloth on the inside if you think reinforcement is needed.
 

V10Pilot

Member
pidjones said:
Cracked side covers are easy fixed with ABS plumbing cement and a little fiberglass cloth on the inside if you think reinforcement is needed.
My covers are completely missing the tabs on the back that plug into the rubber grommets on the frame


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V10Pilot

Member
Well the 98 jets seem to be the ones! Running like a top. Starts easily, idles great, revs don’t hang, pulls strong and linear all the way through, and doesn’t pop on decel.
https://youtu.be/vv_xBSRYgqY
https://youtu.be/FNm6LhYCRiI


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trek97

Active Member
DTT BOTM WINNER
V10Pilot said:
After all this work there is no way I’d leave this shit tank like this.
LOL Dude! I suppose, Beauty is in the eye of the beholder. Eh?
 

V10Pilot

Member
trek97 said:
How clean is the inside of that tank?

Does it hold gas?
It looks brand new inside and it holds gas without leaks. This tank came off an 81K, same as the wheels. The tank that came with my bike had dime sized rust holes so I had to find something else’s. I still really want to find a CB650 tank from the same year.


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V10Pilot

Member
Working on the seat now. Not perfect but not too bad for never using a sewing machine in my life.


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