Puch maxi stock piston size is under 49mm?

Aidan Schmidt /
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Hi all, its been a while since I've posted, bike still isn't running but I recently the will to try at it again.

I was told it was making a bad sound before it died because the new piston I installed was too long and was slamming into the spark plug. So I measured the new, too long piston and the old stock one I had replaced. Looking for replacements on treats it seems that a stock piston should be 49mm from the bottom to top not including the crown. Sure enough, my newer piston is actually around 51mm, too long (checked the page for the product and it said 49mm so I suppose mine just wasn't perfect.

But here's the issue - I measured my old piston and its 47mm in length, not 49.

So im probably just going to order the 49mm now and try it out since I dont see 47mm pistons on treats. If the next one I order is once again too long, could I just dremel it down a bit?

Would appreciate any thoughts, thanks!!

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