Stock motor won’t be the problem, fuel will be the problem. You will have to run really good fuel, or possibly a fuel controller depending on your elevation.
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I havent done the reflash, but i did advance timing 2.5 degrees along with numerous motor mods. tuned my sled and primary clutch on a dyno at close to 4000ft. peek hp was at 8090rpm and average run for all runs was 187hp. I'm running 72.4gr, 5 days on hill so far and seems to be weighted ok. have hit 8200 a couple of times but really havent been in anything deeper than the boards so far, so waiting for a deep day at elevation before i change anything.
positive im not getting this to the snow, has to be the secondary is holding it back, ive tried 42, 45,and back to a 48 degree helix. super happy in all snow and most riding, my riding buddies say and feel i have it dialed as good as it can be, snappy and clean throughout the power band, but i cannot get her track speed up and hook up to do a straight climb pull. stock 164 doo will make me look stupid everytime once it gets steep and bottomless. now it isnt a huge deal, but the last option is drop and roll with 8" drivers. nowhere else to look as i geared up to 21/49 from new
These racer tunes are just another example of why racing is dead,hill climb, hilldrags,grass drags don't matter it spoils it for everyone.Why would anyone invest the time in setting up sleds,haul all over the place to run and never be competitive??.If it's not available to everyone it should not be allowed in stock class racing.