Here is a zero since major overhaul 503 DISC duel ignition & simple single carb with B gearbox. Engine e $4750 Gearbox $975

I have side mount exhaust here, new & used. The dual ignition 503 is the safest 2 stroke engines ever built. BAR NONE !!!

This engine will have a 2 year warranty that begins on your first flight. All my mods & a completely better than new crankshaft .

Here is a 627 80hp engine with all my mods. Big Torque & super fast throttle response. These are the leading 2 stroke engines !!

This is a 83hp 627 built to fly in a Kitfox. The power is crazy & the engine is smooth & 450 hours & $2850 & it's 0 timed again.