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Showing results for tags 'autodecompression'.
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Hey guys, I've recently purchased a 05 crf250x and noticed a loud noise coming from the top end. It looks like it is the auto decompression thing. From the 2 videos (linked below) does everything look good? When riding if I am low rpm, the top end makes a horrible noise but it seems to go away once I open it up. Any help would be greatly appreciated! Also it looks like it is running aftermarket cams, Hot Cams it says on them which I presume isn't standard. Video 1): Video2): Thank you! -Sean
Kieran Black posted a topic in WR250F/YZ250F/YZ250FXI freshly rebuild top on my 09 yzf250 with new valves and piston. I put it back toget her and it ran mint, turned off starting back up and really out noise coming from top end( not normal ) so I was freaking out. I took the valve cover off after guessing it was the auto decompression sticking and played with it a little and it had stopped, pUT it back together ran mint, thought I had solved the problem. Yet when starting it up again after a oil change the noise was back again. ffs, tore it apart and took the exhaust cam out and it was sticking a little but nothing to worry about ( I thought ) I gave it a good clean out with brake cleaner and air compressor. as the decompression comes on it gets stuck half way and feels like something is grinding away in the shaft. sometimes I cant even get it to return. I can even see a edge pointing off the exit of the shaft, means it's being grinding away the insides, so something is stuck in there but how do I remove the decompresson system to clean out? cheers