plug gap for 89 gsxr 750....

[sc2dave]

If the stock gap is .028 and i install an mc-3,what should the new gap be?

[msdpstech1]

Hello,
Provided your bike is still stock and you have not raised the compression on the engine and/or are not running a turbo or running nitrous then the plug gap can be raised up to .040. If you have increased compression and/or are running a turbo or nitrous then the stock gap would be a good starting point (raise or lower in small increments if need be until a sufficient gap is reached). Please let me know if you have any other questions. Thanks, Bret -MSD Powersports Tech

[sc2dave]

It was bored over from 750 to 770.No turbo, no nos.

[sc2dave]

it was bored 1mm

[msdpstech1]

Hello,
A good starting point would be .040 and then adjust the gap in small increments up or down accordingly until you get the best performance out of your bike. Thanks again, Bret