the engine looks totaly diffrent to me. 4 valves insted of 5, one throttle body insted of 2 carbs, the casting of the cylinder is completely different. yamaha wanted to update the grizzly powerplant and just carried it over to the raptor. its a damn 4x4 utility quad motor in a sport quad frame. http://www.yamaha-motor.com/sport/pr...0/compare.aspx
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84 RZ350
96 Banshee w/ rz engine
91 LT250R w/ 03 z400 rear shock and 98CR250 engine (ITS ALIVE!!!)
86 TRX250R w/ f4i engine
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