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ZXR250 1990 will not start; 250 will not start
Topic Started: Jul 28 2014, 09:41 AM (517 Views)
acko6
Newbie
[ * ]
Machine is a ZXR 250 1990
Reported hard to start, not used for 7 years. Cleaned tank and carburettors and would start every time first time. Did so for a week or so. Left it for about 10 days then would not start.
Cleaned carburettors again, checked levels, new filter all seems Ok
Have checked compression and cam timing all seem fine. Seems cylinder plugs 1 and 2 are almost clean where as cylinders 3 and 4 are slightly black as if not firing on cylinders 1and 2
Coils seem fine on input continuity but as coil one does cylinders 1 and 3 don't think they can be an issue. Plug leads seem to have about 5,400 ohms resistance all seem the same as do plugs.
Does anyone have any idea why the engine will not run. What should i check next.
Plan to see if HT leads are shorting out on each other by separating but running out of ideas
thanks John
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andy-750
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Grand Master Poster
hello !
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steviebhoy
Member
[ *  * ]
Take the plugs out and make sure you are getting a spark on all plugs it could be the petrol was off in the tank and that blocked something after it ran the first time you shouldn't have to check the valve timing if you had it running ok last week let us know how you get on.
Stevie
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