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Is this a good jetting start?

  • Thread starter Thread starter mtalneck78
  • Start date Start date
M

mtalneck78

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I have a 1979 GS750L that came with a Kerker 4-1 (no baffle) & pods. The carb has stock jets & has been cleaned & new o rings ordered; timing &electrics have been checked. Good compression & good spark.

After reading many of the jetting posts I think I should go with 122.5 mains, 17.5 pilots, and raise the needles all the way up(5th position?). Also will probably have to open up the fuel pilot screws about 1 turn. Is this a good start? I know it will have to be tweeked & do plan on vac. sync. after every change.

Thanks for any help.
 
Assuming the sizes you mention are about two steps up on the main, and one step on the pilot you should be "in the ballpark" but it may require further changes from there.
Dink
 
mtalneck78 said:
I have a 1979 GS750L that came with a Kerker 4-1 (no baffle) & pods. The carb has stock jets & has been cleaned & new o rings ordered; timing &electrics have been checked. Good compression & good spark.

After reading many of the jetting posts I think I should go with 122.5 mains, 17.5 pilots, and raise the needles all the way up(5th position?). Also will probably have to open up the fuel pilot screws about 1 turn. Is this a good start? I know it will have to be tweeked & do plan on vac. sync. after every change.

Thanks for any help.
Click to expand...
Sounds like a good starting point to me. You may even get lucky.
Don't forget to remove the two floatbowl vent lines so the bowls can vent better. Very important.
 
KEITH KRAUSE said:
Sounds like a good starting point to me. You may even get lucky.
Don't forget to remove the two floatbowl vent lines so the bowls can vent better. Very important.
Click to expand...

Thanks, I value your opinion. I could have never attempted a carb rejet without advice from people, like you, at this site.
 
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