Hello everyone, I have a 02 yamaha Blaster, and I wanted to do a race with her. I do not want to change anything in the engine, only the stock material. My question is what to replace the engine. crankshaft, transmission bearings... the race has 80km on the first day and 200km on the last day are two days of race .
What is your opinion for the bike finish the race, What should I replace?
Sorry for the English'm Portuguese
Please help-me 
What is your opinion for the bike finish the race, What should I replace?
Sorry for the English'm Portuguese

