Na...like Ski says...or sumpthin'...Just Do It!!
![Partyman :partyman:](./images/smilies/icon_pidu.gif)
Yes .020" is very easy to see. And the easiest way to check is to put the old and new piston on a common piston pin and slide the two pistons together. Now you can see if the top edges of the pistons line up.Yikes. That would be a pretty big difference in height.
Lacking a suitable measuring device...perhaps setting them up beside each other will point out any obvious difference and .020 is quite visible with a background reference point for your eye.
If the deck height of the German piston is lower, you have nothing to worry about. If the deck height is higher, check the clearance to the head via the solder technique, then report back here. Use a micrometer to measure, a digital caliper is second best. Skirt shape and oil holes are the designer's choice, we hope they have tested their design.rdsrf wrote:Comparing the 2 pistons, there are definitely some differences. The Deck height isn't quite the same but very close. The skirts are a little different as well. The oil holes in the side of the piston are quite a bit smaller as well.
(My bold emphasis)All pistons are forged using a precision heat-treatment process that allows for production tolerances of just .005mm
That sizing is .01mm..less that 1/2 of one thousandth of an inch...the same alpha groupings as the Pro-X.Forged piston kits are available in A, B and C sizing.
Hope it comes with TWO circlipS!2-stroke pistons are made from 4032 silicium. 4-stroke pistons are made from 2618 silicium - the same material used to produce Formula 1 pistons. Both include 3% copper in materials for better heat resistance. All pistons are forged using a precision heat-treatment process that allows for production tolerances of just .005mm. Forged piston tooling allows for the lightest available product. Kits include antiwear coated piston, rings, pin and circlip.
Made in Germany.