so i did a compression test

[joser1993]

i went and bought a tester and my blaster got less than 25 psi and my 4.0 hp lawn mower got more than 75 i kicked it down hard and it was on rite and every thing and is there something i didnt do its less than 25

 

[stephen12091985]

did u hold the throttle wide open when u kicked it?

 

[darealblaster]

Did you make sure it was sealed right?? I think you only kicked it once, you have to keep kicking it till the neddle stops and thats your correct compression. If you did it right, then that cylinder is f*cked up lol

 

[joser1993]

yeah i opened the throtttle all the way but i only kicked it once how many time am i supposed to kick it

 

[justtwistit]

until the needle stops moving

 

[joser1993]

thats alot of kicking ill go do it right now

 

[darealblaster]

thats alot of kicking ill go do it right now

LOL that reminds me of this scene hahahahahahaha f*cking classic.

 

[joser1993]

i kicked like fouty times and all it got was to 30 psi ,when ibought it from the owner he said that the piston blew becouse they didnt mix the gas and they told him that the cylinder didnt have to be bored so he just installed a new piston and worked until thanksgivung day and i got it like three months ago and only been rhode like thrity hours since i bhought and he didnt use it very much. could that be the problem????

 

[darealblaster]

you need a new top end, open it up and take a look at the cylinder, you will probably need the next size bore and new piston kit.

 

[2strokepower]

yes it needs a new piston and rings,and the cylinder honed or bored

 

[joser1993]

any cheap places and should i get it honed is hone the same bore ,or get a bigger bore

 

[darealblaster]

It depends on the damage, with 30psi more than likely you will need 1 bore size over or maybe 2.

 

[joser1993]

if it is the bore then wouldnt it not move at all

 

[StrokedTater244]

if it is the bore then wouldnt it not move at all

yeah it will still move if the bore is just really worn out....im curious does it run with 30psi???

 

[J4M1E333]

im curious does it run with 30psi???

yeah i am too, 30 Psi is way low.... do you have another quad, car, truck to check your compression tester on?

 

[yb200]

first things first take the top end off and inspect it.......and go from there....most likely you need to bore up one size and get a new piston kit....your looking at around 250 bucks for a top end rebuild...that includes piston kit bore and gasket set....take it apart and post up some pics.....

 

[stephen12091985]

first things first take the top end off and inspect it.......and go from there....most likely you need to bore up one size and get a new piston kit....your looking at around 250 bucks for a top end rebuild...that includes piston kit bore and gasket set....take it apart and post up some pics.....

175-180..............

 

[joser1993]

i did it on my lawn mower and got more than 74 and 4cycle and it s 4 hp is there a differnce betwen auto and motorcycle or they the same

 

[Blaster200boy]

When i did a comp. test on mine, i had to hold my thumb over a small valve on the comp. tester hose. See if there is one. If so that "might" be your answer.

 

[yb200]

100ish piston
50ish bore
20ish for gaskets

knowing you have a fresh bore and piston......PRICELESS!!!!!



lmfao I:I