Templar X 250

[Nutcracker]

Originally Posted by Thumper

The other thing I was thinking about is what potential is there in this 249cc engine? 2 or 4 degree advance? Porting work? And that header section seems like a narrow pipe. And how about airbox mods. All together, maybe add 4 or 5 horse power?

I purchased a replacement engine off eBay for this reason/ parts. I've studied a fair amount on all the things you listed. These engines do have the potential for HP gain. No replacement for displacement. The biggest gain is a 174 big bore kit and advance flywheel key. This will ensure internal temperatures stay below melting point because these motors run very hot from factory. "245°" Seems like you can't overcome this engine to be as reliable as factory specs. Once you approach 21+ HP you surpass the ability to cool the engine with air and will require a secondary cooling source. By increasing HP your putting the internal drive line in a vulnerable state. Go rip on this bike a use a thermal heat temperature gauge to see the external temperature this thing gets up to.