I have a 1995 DT25C that is not making any top end power. The motor has spark, compression is 125 even on all 3 holes. I have cleaned carbs and fuel system, tried new tank, new fuel hose and primer. It starts well and idles, but when run at WOT, it produces what feels like 1/2 throttle. Someone mentioned maybe a bad crank seal? I started engine and sprayed starting fluid towards flywheel and also bottom of block. When I sprayed the bottom of block, engine immediately died. Tested this several times with same results. Iíve experienced failing seals on two-stroke twin cylinder snowmobile engines and they behave differently, with hard starting and revving higher when starting fluid is sprayed. Iím at a loss. Any opinions out there?