Hey guys, I just got ahold of 2 very nice ski-doo tnt's. A 75' tnt 340 and a 74' tnt 400 f/a. Got both for 65 bucks a peice. Both sleds are in excellent condition. I got the 340 runnin but no luck on the 400. The 400 has a bad piston on the left side (pistons are side specific). The problem is I can't find a piston anywhere, my parts guy searched through three different companies. This sled is super nice, It kills me not to be able to bring it back to life. Please, any help would be greatly appreciated!!