I am getting a new piston and rings and I need to know what the stock piston size is. I dont know if my blaster has ever been bored of if it has the stock size piston. It says 150 on top of the piston. Is that stock?

 

If I'm not mistaken, 150 on the top of a blaster piston means it has a total bore size of 67.50mm. Stock size is 66mm so your at 60 over. you have 2 more bore sizes left.

 

i dont know if its stock find out if it is or not if not id get a highr compresion pistion it will give you more power and be about the same amount of money.???

 

they don't make high compression pistons for blasters, just high compression gasket kits. All I know is the stock piston does not say "150" on the top. I know this much:
50 on top of the piston means it is 40 over
I'm not sure if I'm right about it being 60 over.

Someone clear this up!!

 

Now you got me worried! My dad already ordered a standard size wisco piston. I am pretty sure its not bored 60 over because I barely beat a 300ex. Can anyone else help?

 

Being bored 60 over doesn't mean it makes your blaster a banshee killer or anything. It brings the displacement up to like 202cc, not 260. Even being bored to 80 over brings it to something like 207, but that still doesn't make a noticable difference in power. If your dad already ordered a stock size piston kit, your screwed.

Good Luck