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Post by justin010304 on Apr 3, 2013 14:46:27 GMT -5
Bent valves from plastic. Plastic melted onto spark plug disabling spark. Dirty carb. As said before, if it starts with starting fluid than it is a fuel problem. If it doesnt start on starting fluid, then check for spark. If you have fuel and spark by no run then next thing would be an air issue. Bad compression or something.
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Post by chops on Apr 3, 2013 14:48:45 GMT -5
It defo has a spark as I checked that this morn. Quite worried now you mention bent valves!! Doesn't sound good!!
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Post by justin010304 on Apr 3, 2013 14:53:38 GMT -5
Doesn't seem likely as you were just ridding it the day before but its still a possibility. Could just be a tight valve sticking open, or neither! When was the last time you adjusted your valves?
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Post by chops on Apr 3, 2013 14:55:50 GMT -5
The bike is only 6 months old and I have already adjusted the valves once (last time I had a problem).
Suppose my next step really is the compression test. At least that will tell me I I have a knackered engine!
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Post by justin010304 on Apr 3, 2013 14:57:06 GMT -5
Yea, it's a simple check that can bring a lot of relief
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Post by alleyoop on Apr 3, 2013 14:57:56 GMT -5
Have you checked the compression? If you do not have a compression gauge use the old finger trick. Take the plug out stick your finger in the hole and hold it nice and firm in there. OPEN the throttle wide open and HOLD IT AND CRANK IT. If it has compression it will blow your finger off the hole if you just fill a little pressure or nothing then you have an internal problem.
After that I would adjust your valves .004 inchs both of them Leave the valve cover off and crank it over and see if the valves are moving up and down.
Alleyoop
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Post by chops on Apr 3, 2013 14:59:40 GMT -5
Cheers fellas. Maybe have to make a trip into work and pinch the compression tester for the day.
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Post by chops on Apr 5, 2013 8:42:21 GMT -5
still no joy!!!!!
Ive checked valves and they are still set at 004. There is absolutly no sign of life at all. its not even trying to start!
ive changed the coil and spark plug and its still getting a good strong spark.
i havnt managed to check compression with a tester yet but have put my finger over the spark plug hole and cranked the bike over and although i cant keep the hole plugged, i wouldnt say its a super strong force.
really really struggling for ideas now.
it wouldnt be so bad if it at least showed signs of starting but it doesnt.
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Post by chops on Apr 5, 2013 8:43:46 GMT -5
is there any way of checking the side stand kill switch? just to check if thats causing it?
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Post by gatekeeper on Apr 5, 2013 11:54:00 GMT -5
is there any way of checking the side stand kill switch? just to check if thats causing it? If you are getting spark while the plug is grounded on ther motor it is not any kill switch. |
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Post by chops on Apr 5, 2013 11:55:08 GMT -5
Ok. Thanks,that's good to know.
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Post by gatekeeper on Apr 5, 2013 11:59:38 GMT -5
Spray some carb cleaner or dribble some gas in the intake nipple and see if it fires. If so then you need to figure out why gas isn't getting thru the carb.
I've got to leave for the dentist now. I'll check in when I get back.
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Post by chops on Apr 5, 2013 12:05:50 GMT -5
Which intake nipple?
Can't do anything just now as its freezing and bike is back in the shed for the night.
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Post by gatekeeper on Apr 5, 2013 17:48:46 GMT -5
Pull the vacuum hose off of the nipple on the intake manifold in front of the carb.
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Post by chops on Apr 5, 2013 17:50:57 GMT -5
Ok. Will try in the morning thanks. Will have to be some fuel though as I ain't got any carb cleaner at hime
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..BAD TO THE BONE..
