83 cb750 sc troubleshooting/misc questions.

Posted by 83seebee on Apr 29, 2012; 4:23am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/83-cb750-sc-troubleshooting-misc-questions-tp3947654.html

Hey everybody, just wondering if anybody out there has a link for a repair manual.  I saw the 79-83 manual that is downloadable on this site but I'm not sure if that is the right manual for my bike and I tried to download it but couldn't seem to open it after it downloaded...

also, I have a manual for the 84 model and i'm wondering what changed that year aside from the shaft drive conversion.  Not sure if the electrical is any different on the 83.  I'm pretty new to this bike and any insight will be most appreciated.  I just picked it up for $900 and it sure made my day to ride it home but It's got some kinks to work out...

1: The front and rear suspension is pretty soft. I was told 200 a piece for rear shocks.  Would a bike scrapyard be a potential way around that or am i stuck with what I have until I spend the $$$$?

2: The front fork parts are all pretty spendy too for a rebuild with new parts.  what are the odds of getting good results by rebuilding with existing parts and is this a potential DIY project?

3: Throttle hangs quite a bit or just comes down slowly.  the linkage at the carbs returns fine.  Is there something sticking in the carb?

4: The bike has a really significant difference in power when you hit 3k rpm.  are these motors just weak at low rpm or could it be an ignition or carb problem?

5: Right around 7500 rpm there is a loud buzzing sound, but its only between maybe 7500 and 7600.  any ideas?

6: I need to change out the sprockets anyway and from what I hear, plugging the little sludge factory (self oiler) is easy if youre working in there.  Has anybody done this and are they glad they did?

7: I can get a K&N air filter for around the same price as oem.  Is rejetting necessary with a different filter like that?  


I'm pretty new to the motorbike world, thanks in advance to any help here.  If I get a manual I can do some troubleshooting to narrow down some issues and whatnot but thought I would just throw everything out there for now.