I plan to replace the Cobra ISDE exhaust with a custom made one made form a yz426f muffler. It will almost keepup witha 91 cr250. I plan on motocross racing it later this year I know it ain't pretty but I bought it for $600
- 280cc Bigbore
- Racegring Camshaft
- Cobra isde exhaust
- Progressive springs front and rear