at my whits end with my 200x

[RodKnockRacing]

i told you you probably had it 180 out lol but if it coughs and stutters your gettign closer.

maybe today ill get her runnin

[RodKnockRacing]

Well today went and bought a compression tester and i only have 60 psi of compression and its suppose to be 164 psi so something aint right.

[200XMichigan]

Yeah right around 160. Might not be that high before the rings seat but it should be a lot higher than 60.

[Shorty]

Yea when I rebuilt my stock 200x It had 195PSI. So its either the builder or screwed up parts....

[RodKnockRacing]

Yea when I rebuilt my stock 200x It had 195PSI. So its either the builder or screwed up parts....

Hell I'm still learning so it maybe something i messed up I'm not afraid to admit it. I'm thinking the valves arn't seated good enough I need to get some new top end gaskets then tear it back down and see.

[sportsfinat]

find an adapter to fit in the spark plug hole. the one off you compression tester might work if it isnt 1 whole hose/unit. then take the piston to tdc on the compression stroke/power stroke. make sure is is perfectly at tdc and then chuck up an air hose to is and start adding air pressure. On aircraft we put 80 psi in and check for leakage. if you are right on tdc then the piston will not move back down. after you have some air pressure in there then you can figure out where you are leaking...or where it is the worse. If you can hear air hissing throught the carb/airbox, then it is an intake valve.....exhaust=exhaust valve......and if you can hear it through the oil fill or crank breather then it is your rings. this is why i recommended a differential compression tester instead of the absolute pressure tester like the one you bought. it will help out find the problem instead of just telling you that you have one.

[RodKnockRacing]

find an adapter to fit in the spark plug hole. the one off you compression tester might work if it isnt 1 whole hose/unit. then take the piston to tdc on the compression stroke/power stroke. make sure is is perfectly at tdc and then chuck up an air hose to is and start adding air pressure. On aircraft we put 80 psi in and check for leakage. if you are right on tdc then the piston will not move back down. after you have some air pressure in there then you can figure out where you are leaking...or where it is the worse. If you can hear air hissing throught the carb/airbox, then it is an intake valve.....exhaust=exhaust valve......and if you can hear it through the oil fill or crank breather then it is your rings. this is why i recommended a differential compression tester instead of the absolute pressure tester like the one you bought. it will help out find the problem instead of just telling you that you have one.

I will give that a try thanks

[elanharper]

not enough

[RodKnockRacing]

Well took the top end back apart and the top piston ring was stuck so i guess I'm just gonna have to get a .50 over piston kit from wiseco in less someone has one on here they wanna sell.

[oldskool83]

why was the ring stuck?

[RodKnockRacing]

why was the ring stuck?

I couldn't figure that out the groove was clean but it was stuck in there good

[Grizzlypeg]

Wrong size ring? It should have a little gap top to bottom, and be free to expand and compress within the groove. Was it gapped properly?

[RodKnockRacing]

Rings were 65.5mm and i need 66mm I'm kinda pissed about it but life goes on and she will run soon.

[x200x]

if you're spark isn't good enough, i just found a way to boost the spark for a few minutes. (enough to get it started) takee the plug out, test the spark (see how strong it is) and spray a little carb cleaner on it, check the spark again and you'll see that the spark is huge, then see if you're getting gas in the cyllender, if not you can try droppin some gas in the carb, if that don't work drop some in the cyllender, "boost" your spark, and if it doesn't start, or at least fire, then i don't know what to tell you, if it will fire, keep doing that to try and work some gas into it... good luck, and send a post to keep me updated on your progress..

[sportsfinat]

before you buy new.....make sure the ring was in right side up as well...some of the piston rings will bind if put in upside down because they have a beveled edge