the compression should be 150 on a stock 583. take the cylinders off and inspect the piston and cylinder walls.

more then likely the bearing on the drive shaft is way gone.

amsnow.com is a good one too and click on forums.

hello all, are there any drags or radar runs in wisconsin area for the weekend of the 6th?

150 psi seems right, however you to need to use 93 octane at that range of compression. loudhandle lmao at yamaha. skidoos + speed = success deal with it idiot.

nitromethane has a tolerance of -20 below. i doubt i would ride at that temperature. there is guys out there that use nitro meth in there sleds. problems is finding them. we have done research on nitro meth just need some more info before we use it.

what can i say im looking for performance. people use it for dirtbikes and cars why not for sleds.

Has anyone used Nitromethane in there sleds? If so leave your number or number for people that have, or you may email me at improved_600@yahoo.com. any info will be helpful

i heard that this sled comes from factory with about 110-112 hp. has anyone dyno'd this sled yet?

i have a 98 MXZX 440 im curious what the horsepower is from factory. i also curious if anyone has any horsepower tips. i heard that this motor should kick out 110-112 hp. any info would help.