MC18 & MC21 Piston differences

**Tue Feb 28, 2012 7:35 pm » Post: #1 » Download Post**

Just a quickie, are the mc18 and 21 pistons the same?

Cheers
Paul
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More **** two strokes than you can shake a **** stick at.

**Tue Feb 28, 2012 8:02 pm » Post: #2 » Download Post**

No,

The MC18 has a longer skirt than the '21's. The '18 also has a different piston pin boss.

You can use '21 pistons in 18's but not the other way around, well you can but have to be careful.
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If I have to take the carbs off once more...

**Tue Feb 28, 2012 9:44 pm » Post: #3 » Download Post**

Ah good news cheers Stephen. My '16 has lunched a piston (was still running fine, typical Honda..) so am after some replacements. 21 Pistons are cheaper!

Thanks
Paul
_________________
More **** two strokes than you can shake a **** stick at.