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Idles fine - but not in the mid range

  • Thread starter Thread starter phrode
  • Start date Start date
Errh... Find one fault in this picture. It was taken after I reopend the carbs today.
 
Well, that was not was has been causing my problems :-(

I borrowed today a set of carbs from my friends bike. His works 100%. So now I thought my bike would work perfect as well. But no!!!

Still the same f***ing problem. Now I am out of ideas.

Is there anything at all that I have missed that can cause the problem? Electrical problems maybe?
 
If the timing is wrong, should it idle perfect? The valves are by the book.

A new mechanic, yes :-) Or stick to something I know he he
 
Yes...Timing may let it idle smooth...but at the higher RPMS ( when the advance governor comes into play ) The timing may be too far advanced or retarded. I would set the RPMs at the manual setting with the engine well armed up ande fans in front of it.

Then recheck the timing on each side. You do the 1/4 side first ( big base plate ) and then the 2/3 side. ( smaller late sitting on the face of the bigger base plate).
 
I had a similar problem with my GS 1000 with CV carbs: idles fine then big gap until I reached 6000 rpm and then it went like a rocket.
I raised the needles from slot #2 ( from the top) to slot#3: big improvement but still not perfect when opening the throttle 1/4 of a turn.
Back at the needles that I raised one slot further ( in #4): the bike now runs like a dream;)
I know you switched the carbs from another bike BUT...if it's not exactly the same configuration in terms of inlet or exhaust it will prove nothing:cool:
As someone taught me on GSR the CV carbs must be tuned from the main jet downwards....
 
I have now bought a new set of carbs. Tested on a woking bike, and working fine there. If this will not fix the problem on my bike... Im all out of ideas.
 
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