82 GS450T won't hold an even rev

[bwanna]

Hi,

1982 GS450T:

When I hold the throttle to rev at about 5k rpm, the engine revs up and down between about 4k and 5k.

Full story: Engine was running ok, but had the tradition high idle when hot. I just got the bike and wanted to look through the carbs (BS34 CV) and verify the float levels. W/O the gasket these measured 25mm, so I adjusted them t0 22 mm per the specs. This caused excessive up/down rev'g and limited it to about 4k rpm. So, I returned them to 25mm assumiing that was the proper fit for this bike. Now it does it less, but still as described.

Ideas anyone?

[Nessism]

Air leak

Please check the Newbie Mistakes thread linked in my signature.

Your bike needs maintenance.

[Dave8338]

Air leak

Please check the Newbie Mistakes thread linked in my signature.

Your bike needs maintenance.

Just back from a camping trip with the family and "needed" a good laugh.

Thanks for setting me up, ED ! !

[Guest]

Welcome! And +1 to the maintenance comments above...

Pay a visit to the GS Owners forum and go through the sticky for new members, you won't regret it.

Also, if the manual is a Clymer, it's setting for the floats is incorrect and it's actually 26.6mm from memory +/- 1mm.

[mpencegs]

+1 on the float bowels.. I just set these on mine and 22 is wrong.. I set mine to 26.5 and all is well with the world. Also the high rev was the intake boot orings on my bike..