I got a 78 Yamaha dt 125 an i am looking to rejet the carb for an aftermarket exhaust "head pipe" an K&N air filter, My bike runs good with stock jets Main jet is 115, pilot jet 22.5.,I got holes drilled in the air box " for more air flow " i am using the stock head pipe,no silencer an if it makes any difference it has a smoothed out exhaust port,also the air cleaner i am using is actually not an air cleaner but it's panty hose wrapped over the filer cage lol i know go ahead an 
but it works for now
Does anyone know or can you guys help me decide on jets sizes ? i have found yamaha forums an youtube vidz but i wanted to ask on here PLEASE HELP
but it works for now Does anyone know or can you guys help me decide on jets sizes ? i have found yamaha forums an youtube vidz but i wanted to ask on here PLEASE HELP
