Hi i am just wondering if porting the actual exhaust header will make any power improvements. I don't trust myself to take the head off and port the exhaust port itself, and my exhaust header looks quiet restrictive because their is a big lump of welding going around it.
Thanks
Heres some...
I need help on choosing the year of the Yz 125 i want. I am looking into buying an 2005 or 2006 model can someone tell me which one i should get and why.
money is a minor problem if i want to buy the 2006 model because it is around $500 extra. But if you can convince me that it is better than...