[2006 trx250 ex not starting] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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2006 trx250 ex not starting
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Posted by: tazman79

i only have 30 psi the values appear to be ok and seat ok the pistion looks ok and rings are fine. timing is ok any ideas to do or check?

Posted by: 44oEX

30 PSI of what??

if your talking about compression thats WAY WAY to low....but if you have a auto decompressor on it ( it probably does ) you can't check the compression.

do you have spark? is your timming ok? Is your carbed plugged? kill switch are working? valves are set properly? Jetting is good?

it can be ALOT of things that cause a motor not to start

Posted by: tazman79

no i have a motorcycle comp on it. timing is good values are adjusted and has good spark and plenty of fuel i get back firing

Posted by: 44oEX

what do you mean by a motorcycle comp?

I know most engine just like 180PSI + ....30 won't do it.

Posted by: tazman79

i have a compression tester for motorcycles i need 185 psi i know that

Posted by: sandmanblue

So, you do have it cranking, but it only reads 30 psi, right? And this is with the throttle WIDE open during the compression test, right? I would check Honda's recommended setting on the auto-decompressor. 30 psi seems really low. I set mine to about 70 psi, but that's on a 450.

I think a good ballpark would be in the 50 psi range if the auto-decompressor is adjustable (which I don't know).

Posted by: 44oEX

yeah with the auto decompressor, you won't get even close to 170psi, maybe you have a bent valve?

Posted by: tazman79

where is it at? so i can check it the values were ok i allready pulled the head