|
|
Post by trucker on Jun 24, 2011 12:42:24 GMT -5
:sos:
I just got my first scooter was not running when purchased.wasn't firing
so I replaced the CDI now its firing but will only start and run if I hold hand 0ver carb intake. the instant I move my hand away it dies any ideas ?
|
|
|
|
Post by 90GTVert on Jun 24, 2011 13:01:12 GMT -5
|
|
|
|
Post by trucker on Jun 24, 2011 13:42:09 GMT -5
Just tried to adjust mixture scew,It was jamed all the way in ,whenI backed it out fuel poured out bottom of carb.
|
|
|
|
Post by ltsride on Jun 24, 2011 13:47:19 GMT -5
wrong screw, you opened the float bowl drain
|
|
|
|
Post by trucker on Jun 24, 2011 14:42:01 GMT -5
O.K. I should have put my glasses on when I looked at pic, first time on site and already let everybody see how dim my light shines.lol
|
|
|
|
Post by trucker on Jun 24, 2011 16:08:13 GMT -5
Went back and tightened bowl drain and found mixture screw.ran it all way in and back it back 2 1/2 turns check for vaccum leaks, still won't run unless I choke with hand.
|
|
|
|
Post by marshinman on Jun 24, 2011 17:30:30 GMT -5
I would pull the carb off and do a cleaning. You may find the main jet blocked up.
|
|
|
|
Post by trucker on Jun 24, 2011 20:33:01 GMT -5
O.K., I've cleaned carb,removed intake and inspected,no visible cracks, checked vaccum lines,fuel filter O.K., still won't run unless hold hand over breather opening
|
|
|
|
Post by reveeen on Jun 24, 2011 21:50:41 GMT -5
The intake manifolds crack right along side the clamp that holds the carb on.
There is a plastic heat insulator between the intake and the head that could be cracked too.
(both above usually caused by over tightening)
You also want to check your pilot jet in the carb.
A "tight" intake valve can cause the same thing, check your valve adjustment (there is a guide in the tech section)
(These are the things I would check in order)
|
|
|
|
Post by trucker on Jun 25, 2011 13:28:12 GMT -5
O.K. I've cleaned carb, check intake and intake spacer, checked valves, drained fuel tank and put in new gas, adjusting mixture screw has no effect, checked filter and fuel lines both are clear. Maybe I need a new carb. I don't know what else to try. If anyone has ideas or opinion please post.
|
|
|
|
Post by marshinman on Jun 25, 2011 14:44:38 GMT -5
Have you checked the compression yet?
|
|
|
|
Post by trucker on Jun 25, 2011 14:47:21 GMT -5
just with finger,not sure how much compression it should have.
|
|
|
|
Post by trucker on Jun 25, 2011 14:53:53 GMT -5
This scooter is a 2006 model with less than 100 km showing on speedo.
|
|
|
|
Post by marshinman on Jun 25, 2011 17:02:16 GMT -5
You really need to do a compression check with a gauge.
The other thing you need to check for is to make sure your timing is correct.
The piston should be at TDC (Top Dead Center) and the valves should both be closed.
If you pull the valve cover off and rotate the engine until the crank is showing TDC at this point the valves should be closed meaning the both of the lobes on the cam are going to be pointed out towards the front wheel area. If the crank is at TDC and the valves are showing to be open or even partially open then the timing is off and you need to adjust it. Timing chains can jump if the tension is not properly maintained.
|
|
|
|
Post by marshinman on Jun 25, 2011 17:50:35 GMT -5
I have a complete 4-stroke service/repair manual that I am working on uploading to the forum for everyone to use.
|
|
