10/10/2026
I'm not a braggart, but Im very proud of this little motor. This is a 78mm Wossner Piston (300cc) ported stock valve size, 245-.382" intake 239-.372" exhaust camshafts, Kibblewhite springs, 41mm throttle body, homemade intake with a big K&N, BFT exhaust pipe (quiet muffler with db killer out) 93 pump that has been in it for at least a week, stock gearing 520 o-ring chain, 17" CB300R wheels etc....I literally rode it probably close to 300 miles last weekend in the mountains as it sits..... to put this into perspective this thing makes 2.044 hp per cubic inch, my 410 made 1.91hp per cubic inch (of course the 410 made more after some tuning and better fuel, but this was an initial base pull comparison, the 410 makes a ton more torque) Who says you need a big motor! with some tuning and fuel, this is an easy 38hp motor.