B&S 1150 performance mods

[brokart]

*first post* Ive been searching high and low online , and searched in this forum/all threads and have been coming up dry. I have a "homebrew" kart with a bns 1150 motor and am looking for performance parts. Are there just none available? Are there any other bns motors that share exhaust/intake sizes or any universal options? Am I s.o.l.? Or just not looking in the right places? Any and all help would be VERY appreciated. Thanks!

 

[nascarnation]

I have no experience with Briggs, but increased hp is all about compression and gas flow.
Bigger carb, less restrictive exhaust, head porting and milling, more aggressive cam profile.
All of which are needing a higher speed than the stock governed rpm to really show benefits.
Not sure about the durability of flywheel, piston, rod etc.

If you're somewhat skilled, you can do the carb, exhaust, and head yourself, and look for someone to grind a new camshaft.