OS engines
 

I just picked up a rc8.2 and it came with 2 motors. One says OS max 21xz on the crankcase and the other says OS max vz on the crankcase. Looking for part numbers for cylinders and rods for each motor. I've looked then up on amain but can't be sure what exact engine they are. Some say v spec and v spec II. Any help would be greatly appreciated. If I can't figure it out I may just sell them and get 2 brand new motors that are new and fresh. Thanks for the help.

You might want to repost that questions in the Nitro section here: http://www.rctech.net/forum/nitro-off-road-130/ as very few Nitro guys come through this part anymore.

Thanks for the help