120 monster

[pit rydar]

hi guys

just wondering how do you know i you have a big valve lifan also known as the lifan 120cc monster motor?

also i need to know what my bore and stroke is, i have a pitpro rr 125cc with the black motor as i want to buy the tbolt 141cc big bore kit.

thanks guys

 

[Le|Garage]

The 125cc pit pro with the black motor would be 54x54 (not start in any gear) as far as i'm aware they have the big valve head aswell, you have the screw on tappet covers don't you? if so then yes it is