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Living in Thailand and trying to repair a friends old bike. Only thing left to repair is the carburetor but it may have been looked at many times and I'm not sure what the correct jet sizes are. It has a single Keihin carb. There are two numbered jets that may have been swapped or could be the wrong.

The Pilot Jet (The one that works with the sliding needle) is a 95 and the Main Jet is a 138. Does anyone know if these are the correct jets for this machine?

No one around here has ever worked on one of these bikes.

Much Thanks,

Dave/250T Custom
 

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I don't know what the correct sizes are for that model. But the jet that the needle slides in should be the main jet and should have the larger jet in it. ... #138 in your case. And the smaller (primary jet) #95.
 

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The closest manual I've got, which if for US models, shows the carb as a VB series. If that's correct then the Primary main jet is the smaller of the 2 and is located closest to the mixture screw. The secondary main, larger of the 2, is located under the needle.
Moved to SOHC Fuel section
 
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