| Re: summit x 670 I'd leave the motor stock and upgrade the track to a 144 or 151. You can get a good used track for 4 - 500. Move the skid back in the tunnel (poor mans drop and roll) to improve the track angle of attack and you can build your own tunnel extension or buy one. Did mine for just over $500. Huge difference. Best mod you can do to that sled. |