Topic: poor top end performance

[redschwa]

I just bought my 82' cb650sc and it runs great. new air filter, chain, brakes, and oil. Only problem left is as follows. It runs great all the time until i get to fifth gear at around 60-55mph. The bike won't rev past 5000 RPM no matter how much i open the throttle. I ran it like this with WOT for about a mile and then suddenly the RPM's shot up to 7500ish and i was going 80 with more power to spare. I can't figure out whats wrong. Also this is my first bike and my first try at working on it. My guess is the floats in the carbs are sticking or maybe a fuel filter problem. I haven't pulled off the bowls yet because i want to make sure or at least have a little confidence before i go hacking away.

[ev0lution7]

check the CARBS!!!

sounds like they are sticking and need a good thoughough cleaning......

[redschwa]

I had a feeling i'd be pulling my four little babies off.  thanks ill probably come back for help on this "checking the carbs" idea of yours

[ev0lution7]

look here is a thought....

1st.
You allways have to stop the bike fix that first!
2nd.
you will need to turn the bike... fix those next (tires, forks, shocks, ect...)
3rd.
once that is fixed you will need to make sure the motor runs "OK"
4th.
charging issues fix those next...
5th....

RIDE!!!!


that is what do on my stuff and it worked great my bike came together pretty well if you have a plan and a mind set things seem to fall into place and you dont seem to panic or NOT know what to do... kinda like a diagnostic chart...

[redschwa]

sweet!! thanks. This has started to feel overwhelming but I'll try the planning out idea. I hope it works for me. Thanks again for the help Luckily for me I'm already on step three.

[ev0lution7]

get your self a small white board to keep the project small and focused it has helped me...

take 1 project at a time and pretty sooon motorcycle's dont seem soo complicated...

our sohc's are pretty simple but a few too many projects and it might seem too complicated...