I am new to this page, I have a 1993 ttr 250 and need to find the main fuel nozzle the original size and a smaller size also. My mechanic told me that the brand of the carburettor I have on my bike is (TK), anyone can help me?
Main jet sizes were different for US and European markets, and if you have after market exhaust, or airbox modifications. I think European/Japanese Open Enduro models had a 147 main jet, and US versions had a 137, if I remember correctly, but there is also information on the Frequently Asked Questions page under Carb Information