Hi Guys! Ive posted before about this bike but Ill start from the top. I think it may be hard to explain so bare with me and I hope I dont miss anything. I bought an RM250 as a bit of a project. The fella told me it was a 98 with a 99 engine. After putting some pics up here a few of you good people comfirmed that it was a 98. And after doing a fair bit of research I found out the engine was a 99. The fella had broken a piston up and there was lots of pieces in the crank area. He didnt say but I assume he just got fed up with the bike and wanted rid of it. He already got a KXF so didnt need it. When i picked it up the cylinder/piston were stripped off the bike. I had the cylinder which looked fine to me. Anyway when trying to fit the cylinder on the engine it clearly didnt fit! After more research and help again off you guys turns out he gave me a 98 cylinder with the 99 engine! Obviously no chance of it fitting. So I was missing a 99 cylinder and head and obviously the power valve assembley. So I found a perfect cylinder and head on ebay for 75 quid. He 100% promised me it was for a 99 as he brought the bike it was fitted to in 1999. Its pretty much brand new, and it fits the bike! Then all I needed was the power valve assembley. I couldnt find one in the UK, but found one in the States which is on its way over. I have a clymer manual now and im even more snookered now. This is the confusing part... The 99 and 2000 cylinder are identical in everyway apart from two things. The 99 has a breather pipe with a filter on the left, and the 2000 has a pipe on the top which I believe goes to a solenoid. So it turns out I have a 2000 model cylinder! This is now a problem as I dont have the powervalve solenoid as my loom is a 99 to go with my 99 engine. Here I think are my options.... Buy a solenoid (but how would I then fit it to my loom?) Buy a solenoid and a whole new loom (expensive) Buy a solenoid and get the soldering iron out (dont fancy this) Change the pipe that would normally go to the solenoid for a much longer pipe and use it as a breather (the 99 cylinder does this only the pipe fitting is on the side not the top?) Block off the pipe that goes to the solenoid Any ideas? Sorry for such a long post. Bit baffled with this one. Thanks!