But the porting and flow characteristics in the head design can change that rule of thumb drastically which in this case it does.mainly because it was later ported to the 500 model. usually up two sizes on the main is a rule of thumb when going to pods/pipes/and emission deletes to run well. This of course takes into account of removing the epa crap etc. If you don't care so much about fuel economy but lean towards more performance then a 50 pilot and 145 main. Research into this model's head design and into a few boards bring good pod jetting brings it to a 40 pilot and 137.5 main.for best performance and fuel economy. The type of jets needed for this carb are pilot Mikuni VM22, and main is a Mikuni Small round. I'm not sure what it has in it now 's a lot of years is a long time for a bikes carbs to go without being cracked and changed at some point, stock jets may be in it but may not be. Simply because the same carbs were used on different bikes, and they were jetted to match the needs of that particular engine.įor your bike model that carb had factory jet settings of 17.5 pilot and 115 main. Going by the carb number seems logical to find the jet sizes but you have to go by bike model.
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