2003 Blaster Compression Normal

[Blaster Pete]

The most I can get out of the Compression gauge is 75 lbs (it go's to 75 lbs fast too but stops at 75 lbs)

the Blaster will not start , is that figure (75 lbs) to low to start it up?

has spark , has gas , at least has gas in the float bowl , what would prevent gas from being suck into the Engine? is there something on the Carburetor that I should check? or is the Compression too low? what Compression is the stock range?

Thanks.

 

[super noober]

i belive stock is around 125lbs? at any rate 75 is waaay low, time to take the head off and look for damage. mabey its just rings,

 

[Zwiser]

my 03 is at 105 and starts when it feels like it lol

 

[yamahaman126]

My stock Blaster has 140psi. If your at 75psi then it time to rebuild the beast. Anything over about 90 psi will run.

 

[98blasterworked]

idk what mines at.... but mine fires right up... my best suggestion wud be a top end rebuild with a wiesco piston.... usually anything over 90-100 will run but its good to be above that

 

[Blaster Pete]

Piston was Sized and Rings were stuck to the Piston where the Exhaust Port is (maybe a 1 inch section) Clyinder is at the Shop now to get a bore job , the wrist pin looked fine (I did get a new one) my ? is the wrist pin and bearing look fine , no signs of galling , and the rod (rod bearing) look fine , no up and down movement , Crank rotates fine no signs of rough-ness when turning over , I ssume the rod bearing is OK how do you tell for sure?