125M High Comp piston

[125Mmadness]

Hi everybody, I just picked up an NOS Rocky High Comp .50 mm over piston on eBay for $35, I have been under the impression that they never made them for 125M's any info about how many were made or what all companies made them would be greatly appreciated.

[350for350]

What year is it for? Maybe they were made for the first gens, but not the second?

[just ben]

I don't understand the thread... it's an aftermarket part so a million or 10 could have been made.

[125Mmadness]

It's an 85 so first gen

[125Mmadness]

I was just trying to see if anyone else had ever seen a high comp piston for a 125

[shortline10]

Ive seen big bores but never a high compression piston for the 84/85 125m .

[125Mmadness]

Ive seen big bores but never a high compression piston for the 84/85 125m .

It's a Rocky it is only .5 mill over so not a big bore, and by the looks of the dome compared to the stock ~8.8:1 piston I would have to guess it is 10:1-10.5:1.