Hello all I hvae just bought a 2000 yamaha wr400. Fancied one after reading the mag actually. So decided to buy a 2000 model just to smash up green laning in the winter months. Problem i have is that when u pull away fast. (give it a handful) it boggs right down and stalls as if it's flooded itself. I have done the basics cleaned air filter changed plug etc. But I did noticed that the return throttle cable is freyed very badly. Would this maybe be the cause? I noticed also that when u open the throttle fully it gets stuck then after say 2 seconds returns again. Any ideas you helpful bunch?