Good news and Bad

I haven’t been signed on in a while, life you know the drill, but still riding my ’82 650. Saw this thread wanted to put my 2cents in. 1st don’t take it to Yamaha shop. Those prices are crazy for that work. It must be ‘cause they can get big money for repairing $13,000 sport touring bikes. 2nd what is the reason they think you need work to your Cam Chain? If its noise I’d think Valve lash but I’d question Cam Chain. 3rd If you don’t think your bars are bent leave it for now. The rest of the work with some guidance from some very smart people on this board you CAN do yourself. I’d tackle those carbs first. Go SLOW. If the bike runs now chances are they’re not that bad. I’d leave all the carbs on the rack and work on them that way. Keep all the parts together for each carb marked accordingly. Be careful with all the rubber bits unless your going to replace them all and be extra careful with the rubber diaphragm attached to the vacuum piston on each carb. They don’t take abuse or carb cleaner well. You CAN do this take your time ask for help.

 

Yamahamama, in the front of the factory manual is the supplement for the J and K 650 Maxims. It covers the things that are different than the G and H models.

Here (to the best of my recollection) are the service items you need to read from the front of the book. All the other stuff is in the main manual.

1 - Carburetor synchronizing. This is not carburetor cleaning, but setting them up so they all are at the same pressure on a running bike.

2 - Front forks. You have air assist forks. They are pretty much the same as the earlier fork except for the schrader valve on top to pressurize them. No more than 17 PSI, and use a hand pump because the air volume is small and with a compressor you can run the pressure up and blow out the seals real quick.

3 - Side stand switch and relay. This prevents you from riding with the side stand down. It also entails some minor mods to the safety relay circuit that keeps you from starting in gear without pulling in the clutch.

4 - Cam chain tensioner. Yours has an automatic tensioner. No adjustment is necessary, however the install procedure is a bit different.