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04 TE 450 Valve clearance advice please.

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I have been having what seems the common problem of very hard starting from cold & sudden low rev engine stall so have decided to try sort this out,so have started with valve clearances & found both inlet at .006" so happy with that,one correct exhaust valve at .008" but the other valve nearest the de comp lever having no clearance:thinking:...what effect would this 1 wrong valve clearance have on the bikes running..dont think this will solve all the issues but sure wont help it either.

Any thoughts appreciated.

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Having zero clearance at any valve could will cause hard starting and could cause your stalling issue. 04 Huskies also had the Mikuni carb which had issues and was lean from the factory, which also caused hard starting/stalling issues.

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Have had another look tonight & have noticed that the valve lifter is not allowing the exhaust valve to close so no clearance present but if you gently put a screwdriver between the head & the lifter & apply a little pressure the valve lifter snaps back & releases the valve which when checked is the correct clearance,has anyone else had this problem or any ideas what is going on ???

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Remove rocker cover. In the forward RH corner of the head about an inch in is a pin this locates the decomp shaft it's probably popped up and shaft has moved so the pin is not locating properly in the groove of the shaft, when putting the cover on its jamming the shaft.

Later George

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Have checked the pin and its slightly raised above the head but does feel fully home & the de comp shaft feels located,when you engage the de comp with the cam in valve closed position as you would check clearances the sprung dowel/pin in the cam pushes the valve lifter at an angle which then jams the cam tight on the shim untill you prise it away & then snaps free..hope that makes some sense.

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Sounds like the auto decomp is working properly. Lets not assume the pin is in correctly. Look to see how the spring is on the manual decomp for reference. Pull off the cable then pull it out decomp shaft, check around the pin groove for witness marks that the pin was not in the groove it happens a lot. Then reassamble it can feel the pin go in locate in the groove.

Later George

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Well valve lifter does seem to be working & located right so guess the search goes on to cure the starting & stalling problems,so far valve clearanes ok,crank/cam timing correct,strong spark so have had a quick look at the carb jets & all seem stock sizes & clear but will strip the carb down to be sure,still seems strange that hard to start from cold but once started will then start right up on the button but then gets low speed/rpm sudden stall with clutch in or out...this bike is driving me bloody crazy just want to get out & have a good thrash...:lol:

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Have now stripped & cleaned the carb & all seems in order but decided to replace the stock pilot with a size 40,the bike now fires up easily from cold & on a quick outing have had no stall issues.Hope to get out on a longer outing real soon to give the bike a proper test but hopefully all these issues has been down to the pilot,fingers crossed ayway...:lol:

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