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Post by wontstart on Aug 14, 2005 9:20:52 GMT -5
hello,after about 3 weeks of troubleshooting and replacing parts, i finally checked compression and only have about 50. tried the oil in the plug hole,it didnt increase compression so i think it may be my valve seals, whats involved with changing these. thanks
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Post by chanito on Aug 14, 2005 9:48:05 GMT -5
 alve seal will not make you loose compression, just use oil, probably your vaslve are not seating properly, remove the shims and crank to check compression, if it gets better then you just need to adjust your valves, if not you probably burnt a valve, just make sure that you can crankit with the shims remove, i do not know how deep the shim pockets are, if they are too deep this ideas might not work
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Post by wontstart on Aug 14, 2005 12:10:30 GMT -5
i removed the shims but compression only went to 55 ! is it a big undertaking to relace a burnt valve ? any pictures posted anywhere? thanks for the help !
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Post by Dandy Dan on Aug 15, 2005 17:46:52 GMT -5
The shim pockets are maybe 1.5mm deep as a guess. Have you tried using the kickstart to crank the engine to top dead center and then checked to make sure both valves are closed? This will ensure your timing is correct. There are marks under the valve cover that are supposed to line up at TDC.
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Post by chanito on Aug 15, 2005 18:13:58 GMT -5
 i will take some pictures of the service manual so you can see how to replace a valve, it is not that hard, but the easiest way would be to take the head to a machine shop and have them do it, should be no more than fifty and it is maoney well spent if you have never done it, however if you fel brave then go ahead and do it ;D
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Post by chanito on Aug 15, 2005 19:10:32 GMT -5
Ok here are the pictures from the service manual, first a troubleshooting guide for low compression  now some schematics of the head and the valve train   some instructions on how to check  |
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Post by wontstart on Aug 15, 2005 21:52:11 GMT -5
i appreciate the pics,,,,hopefully i wont have to do the valve job,,the shims seem to fix the problem,thanks again!
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Post by moose1752003 on Sept 9, 2005 17:50:52 GMT -5
I agree. Good pics. Where can you get these shims that you talk about?
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Post by Dandy Dan on Sept 9, 2005 18:13:46 GMT -5
any honda dealer sells em. the use the same shim size on all there motorcycles so the mechanics should have the right ones in the back. Some times the service guys are ignorant/anal and want you to order shims but the mechanics always have a box so they can adjust bikes when they're brought in.
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