so did you replace the coil?

 

by the way thanks lynn for the info it makes alot more sense now. thanks jaster for the comment

china bike rookie

 

thanks lynn for the info makes sense now

thanks jaster for the comment

china bike rookie

 

well lynn i found the info on the net for the compression rating but as i said it doesnt seem to be quite right to me. does anyone know what the compression rate for a 70cc chinese bike should be? like i said maybe i should just by a new engine if that is even possible i cant even verify that type of engine the serial #'s come up as unknown

thanks china bike rookie

 

what's the compression? <90 psig? what you'd look for as far as a replacement if you ain't gonna rebuild it is this: just a few pointers. which CDI powers the thing, 2 stroke or 4 stroke, horizontal, 45° engine, or vertical engine. then, how does it bolt up to your gearbox/driver/transmission? those are a few things to consider.

another thing, it doesn't have to be replaced with a 70, you might get a 90-110cc in there.

 

ok i am posting here again if i repeat myself i apologize but when i quick reply it is not posting so i am trying here

Lynn I am not even sure myself about the compression info, i found it on the net myself i find 130 psi to be strange but that is what i found.

does any one know what the compression rate of a 70cc chinese engine should be.

I was thinking of maybe swapping out for a new engine but i cant even figure out what type of engine i have because the serial #'s come back as not found.

I have replaced the coil and the carb. compression to me is next also going to check the see if the spark arrestor maybe plugged causing no fire up.

china bike rookie and a very patient little 10 yr old

 

I beleive it was around 90 psi, bought a nw compress. tester going to try it tomorrow. using old marking paper type hard to get exct reading. I was wondering if it was posssible to get a larger engine in there? dont really want to buy new engine but I cant find any specs on this engine and it is hard to rebuild an engine without specs never mind having never done it before.

china bike rookie

 

there's a few places online to buy replacement engines. as far as dimensions, it'd be a phone call away. 90 psig is close to borderline on low compression i think. but it ain't totally worn out. .
130 psig is much better though