Ive had my 17 drz400sm from dealer, last year i did the 3x3 mod,jets and full mrd system and absolutely love it. All of a sudden in the middle of riding a average temp, average ride the bike no longer you allow me to do any heavy throttle. I can roll throttle on and full rpm range, and once...

So here's the situation everyone, I bought a 2007 DRZ 400 SM and It has had a lot of butchery done to it and a lot of good engine work too. The engine work that has been done is : Bored and stroked to 462cc, has a full Akrapovic exhaust, a keihin 39mm fcr carb, the guy put as many holes in...