Low Idle rattling

[gsx1100norway]

Hello

Regarding my -82 GS1100E...
Got a rattling noise when idle are about 1100 rpm or lower, but not if I rev it up a little bit to approx 1200-1300 rpm. ( Sounds from the "gearbox" )
Are the syncronizing of the trottles the only problem or could this also be other issues.... ?

Valves are adjusted properly...

Any experiences out there ?

Regards
knut

 

[hillsy]

Sounds like the notorious clutch hub rattle. You can either pull the hub apart and replace the hub cush springs (you need a welder), or just keep your idle up.

Balancing the carbs will help a bit, but it probably won't completely go away.

 

[gsx1100norway]

Thank you Hillsy

I`ll try to open the hub and solve the problem this winter.

Knut

 

[John Kat]

Sounds like the notorious clutch hub rattle. You can either pull the hub apart and replace the hub cush springs (you need a welder), or just keep your idle up.

Balancing the carbs will help a bit, but it probably won't completely go away.

It could be that or else there is a little rubber cushion behind the clutch hub that is worn or missing.
It's item # 31 on this drawing: http://www.cmsnl.com/suzuki-gsx1100-1983-d_model13730/partslist/FIG-22.html
If it's more like a loose marble noise it comes from the one way starter clutch. This happens when one of it's retaining bolts is broken...

 

[MAC10]

The clutch basket rattle can be differentiated somewhat by listening to it running while on the side stand. It will be more prominent because the oil is tipped away from the clutch basket. Hold the bike upright, and the rattle should be quieter as the oil levels out, damping the sound.

 

[gsx1100norway]

Thanks a lot for all information ..

Knut

 

[chuck hahn]

Also youll notice its a bit quieter when you squeeze the clutch lever. Theres springs like they said in the back of the clutch basket that dampen the vibrations from the flywheel meshing with the crank. These get weak and loose and let the basket rattle.