hi,just bought a montesa 315r 2000. Its my first bike and needs some repairs to the engine, this included a new top end which the seller stated on the advert. Just wondering if anybody could tell me what specific parts i would need to replace, the piston needs replacing and the cylinder is badly scored. Any help would be much appreciated, particularly a place where engine parts are available, prefferably in the Leeds/Wakefield area.
Thanks