HondaCB650

79-81 was 16\39 stock.
82 was 17\38 stock.

You can change to the 17\38 to get a 69.3mph @ 5000 rpm w/130-90-16.
Compared to 16\39 to get 69.2mph @ 5440rpm w/130-90-16.

Have you check the timing advancer yet? I can't remember if you have.
If not. clean, and lubricate it.

What plugs are you running? It may be a simple matter of the wrong heat range plug.

MiGhost, I have the same issue on one side, and it is because the threads of that outboard bolt are stripped. I put a rubber gasket under the head because the threads got some purchase at that point, but I need to retap as you suggested. My question is, can I do this without tearing the engine apar...

a leak between the head and block, theres always oil on the fins like it may be dripping or have a crack somewhere. the oil loss is not tremendous, maybe a cap full each ride. Ive checked for a crack and cant find one. the bike over all runs fine (i just started it after a year in the garage and af...

You do not need the complete ignition cylinder, only the base cover.

http://www.ebay.com/sch/i.html?_odkw=35 ... 7&_sacat=0

She is not a runner, but I intend to do a complete engine rebuild, hopefully with a Dynoman 674cc kit and ported head. You could easily go to 740cc with 750(DOHC) sleeves, and an 836 kit off ebay. I am sure you have read Paul's big bore build up over on SOHC4. There will be something even bigger in...

While trying to start, we have oil oozing out from under bolt heads on either side of cam shaft cover. It looks like there are oil ports on both ends of cam shaft ends, Are we missing a O ring or something? Yes. There are oil ports for the cam on each end of the head. With oil seeping out of the en...

My questions to the seller would be. How was it determined that the head gasket was blown? Was a compression test done on the engine, and what were the readings? A blown head gasket is one that does not contain the compression within the cylinder. Either by leaking from one cylinder to another, or f...

That patch looks to be a poor attempt to plug an oil leak caused by stripped out threads for the head cover bolts (mine is the same). Notice the non-OEM hardware, and hints of oil around the patch. It is likely the o-ring seal on the cover was compromised in the process. The casting would have to be...

The CDI is an electronic unit. It either works, or not. No middle ground. If you are firing on all 4. The CDI's are good.

Yes. The fuse on the solenoid is 30 amp.
Corroded battery, and ground cables will keep the coils from getting full voltage so yes that could be a possible cause of bogging at hgher rpms.

Double check those needles to make sure that there is not a ridge on the tip where they might have been seated to hard into the body. The top 2 in the pic look they might be.

Folsoml wrote:I've dealt with Tom and I highly recommend him.

+1
Highly recommended if you need parts for your bike.

anyone know what frame is compatible with the 82 nighthawk engine and other parts? do i have to get an 82 nighthawk frame or can i get away with certain years? Everything but the fuel tank, seat, side covers, rear fender, and seat trim plastic can be used on the following 80-82 CB650 (the 4-4 exhau...

Make sure to cut the strip of metal long enough to reach up onto the switch far enough for the clamp to get a good grip.