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Pilot jet size discrepancy

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

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While rebuilbing my carbs (1981 550L, all stock)) I've found the the replacement pilot jet is a 4.0 while the original is a 4.5. The other replacement jets are the same size as the originals (main jet=92.5, air jet=150). I've checked the K&L website and I've got the proper kit for my motorcycle (according to them).

I've put the new jets into the now clean carbs but I'm wondering if the K&L folks are wrong. I must say that when I removed the plugs before the rebuild they looked too rich.

Is there anyplace to check on the stock jetting for my motorcycle?
 
Sometimes it is on the fiche for the bike but it's always in the Suzuki factory manual.

Steve
 
In the 80's with the emission regulations our bikes were jetted lean. I would use the 4.5 pilot jet
 
Sqdancerlynn1,

The jets that came originally are the 4.5 and the new ones in the carb kits are 4.0.
 
Your original? jet is larger and may have been changed at some time in its life
 
That is correct. The pilot jets I removed from the carbs were 4.5. You are right that these may have beed put in by the previous owner as the air screw covers had already been removed. However, the main jet and the air jet were of the same size as in the rebuild kit.

Does anyone know the size of the jets that were original for this bike?

Thanks.
 
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