[Engine stopp pulling around 7000RPM]

Hi,

I have used sea foam last tank, to help but other than that I cannot tell anything other than idle and rev is smooth and linear from idle up to 6-7k rpm.  That said I am the new owner so no clue if it should be even better, I have the stock airbox with a washable foam filter inside.

I did my homework, so my understanding is that carbs needs to be re-jetted with almost any exhaust change, so I assume that is the next step

 

Thanks for the guidance !

 

Alex

 

[Engine stopp pulling around 7000RPM]

Hi,

I am a new owner of a GS750 1981 and I have (i Think) a exhaust or carb problem. the engine is running smooth and pull great until around 7000K Rpm.

When I purchased the bike the 4/1 exhaust was terribly choked(1.5'' ID with baffles), so I pulled out the baffles and build a new insert with a 1''3/4''ID perforated pipe with glass packing without baffles . So it help so to live up the engine but still it ''saturate ''aroud 7000RPM, like if it can't inhale or exhale properly.

Is 1x 1''3/4'' ID  is enough to flow out ?

Could it be jetting problem ?(no clue what is the carb set-up)

The plugs are new, so I can't really read them.

* My Tachy needle is a bit crazy, so I can't be sure of the 7000Rpm but surely I can' t reach the 8000+ of the hp peak.

 

Any ideas ?

 

Alex

[Dashboard]

Thanks for the welcomes,

 

I just realized that the RPM is also by cable so I lube up both, we will see the results next ride.  Other than that It is really fun to ride, I was expecting a noodle chassis but it is quite stiff for an old one.

Alex

[Dashboard]

Hi,

 

I am a new and proud owner of a 81 GS 750E, and I have a question regarding the dashboard; 

1-Speedometer needdle is bouncing, is it common, any fix ? 

2-Tachy is also quite vague, idle steady and seem to be fine, but anything over 3000 rpm seems to be vague and floating, again, is it common, any fix ?

 

Thanks !

 

Alex