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Discussion Starter · #1 ·
can anyone tell me how to tell if a motor is a black magic 670? is it a stock 600 bore? is is a smaller motor with bigger pistons and cylinders? i just really need to know how to ideentify one by inspection, thanks alot[confused2]
 

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I would speculate it is a 680 big bore (678cc), not 670. Stock 600 bore is 78mm, where as a 680 big bore is 83mm. If it is a complete motor, odds are it will look like a stock 600cc motor.
 
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