K157fmi 150cc Cam Question

[lagerlout07]

Hi,

Had my bore kit fitted for awhile and happy with it, installed a 30mm carb which was a pain to set up but again was another nice boost. But as everyone who does this knows top end power tails off pretty quickly. I've read a few times someone saying they have a 200cc cam for their bike which should help with this abit and I'd like to try that as my next mod. But what engine is it off?

thanks in advance.