Hi. Kinda new in here, but today I have bought a new bike. Its a 1998 KTM 625 frame, with a 2004 KTM 640 engine,forks and plastic. I bought it in pieces, so I have something to do in the winter period.. (I live in Norway,un-isolated garage, at -25c.. nice life) The thing is, this is my garage-weekend, and after getting done with my RS250, i wanted to get the LC4 engine in the KTM frame... I could not get it in. No chance. It got hydralic clutch,the engine is grey, and it says "motorex" on it (just to give a clue on what engine it is) It also got a balance-shaft. - The frame is a 1998 with a filter in the bottom. The frame, and standard engine it was delivered with was with a balance-shaft. Thats what the workshop manuel says anyhow. And I thought this would work, because both had balance-shafts, and both have filters in the botom, and both are LC4. Is there a special how-to get the Lc4 engine in? Up-side down, no cylinder mounted, cut the frame up, and weld it together? Jeez. Im tired. haha. Please help?