Aftermarket DG exhaust

Yamaha Raptor 350 & Warrior Forum

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Bruce

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Put an aftermarket DG exhaust on Yamaha warrior,ended up putting a 1 inch reducer in the pipe, because I was using the stock carb. Now I upjetted the carb and it is backfiring. My question is should I remove the 1-in reducer and the pipe to get more airflow or less back pressure thanks any help appreciated
 

beastlywarrior228

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Remove the reducer. You want as little back pressure as possible. You should be around a 150 main and 45 pilot.
 

Bruce

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Remove the reducer. You want as little back pressure as possible. You should be around a 150 main and 45 pilot.
That is the size of the Jets that I put in did take out the reducer still having a hard time running can't figure it out
 

Bruce

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I did put the 150 and 45 Jets in and took out the one inch reducer when I put the Jets in it came with a needle shin so I put the needle in the stock position and put the shim underneath it. Now it will only run 5-10 seconds popping back firing a little bit and die out should the shim be in there ps it came with the jet kit. I still have another warrior 350 one serial number apart that I need to do the same thing to but I'm doing that one till I get this one figured out
 
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