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Mid rev. missfire under load?

  • Thread starter Thread starter BMcD
  • Start date Start date
B

BMcD

Guest
Hi. I'm new to the forum but have owned my GS1000G for over 20 years ( 44,000miles )and I have a problem I can't seem to solve.
The bike fires up fine and appears to rev up smoothly with no load BUT as soon as I hop on and accelerate it 'misses' at about 2500RPM, not badly but irritating.
Once the throttle is opening further it's all smooth again.
I've stripped, cleaned and blown the carbs out (compressed air ).
Replaced the Plugs.
Checked the Advance and Timing with a Strobe.
What am I missing? Anybody else had anything similar?
Any help gratefully received.....................Bill
 
Still sounds like a clogged pilot or partially clogged needle circuit.

Give us a little more on the carb rebuild. Exactly how did you "clean" the carbs? Did you completely remove all the jets, the adjustment needle screw, needle jet and replace all the O-rings? Did you dip the carbs? Poke through all the openings?

Here's a link to the rebuild tutorial as well:
http://www.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

It will give you a clue as to what is considered a "proper cleaning" on this site.
 
Thanks for the reply.
As for Carb. cleaning/stripping the only thing I didn't do was replace 'O' rings and dip them, nor did I poke any of the openings but used compressed air to check they were clear. I also 'softened' the Carb rubbers using Wintergreen Oil and Isopropyl Alcohol as I originally thought it may be an air leak.
From what you said I think I might have to do it again.
 
It could be that you finally need to change the O rings behind the carb mounts.

V
 
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