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The stock head is already 12-1. I could see a 13.5-1 maybe adding 3 track hp. When your spending $1500+ your getting pretty close to BB $$$. Bang for your buck i think BB would be the route. RK Tek drop in $800 Slp pipe/can $670 Fuel Box $400 Clutching $300? $2170 Big Bore $2200 Fuel Box...

How much do you weight? I am in dislike with the factory shocks. Can you take a pic of your rear sock settings? I miss having fox air's. So easy to adjust and rebuild.

Impact from a big jump or casing a big jump probably. Shock bottoms out creates a lot of pressure on the bottom a-arm.

Are you thinking of a new yammi viper? I know pg yamaha is doing snow check packages with a long track and a turbo option.

I will believe it when i seen a non biased dyno results with before and after. I am just sceptical thats all.

No way your getting 12-15hp out of that.

Better off to lose the extra 20-30lbs that a lot of people carry around lol.

To bad the pro isn't 150hp stock. I think more like 13-15hp increase at the track with big bore.

I believe the terra alps kit is $2200. Head, exchange cylinder, pistons, tuner.

I am still on the fence about going with a kit. I have had really good luck having a stock sled this last half of the season. First half was a mod sled nightmare. If I get a snow bike as a second ride I will go terra alps kit. Price decent, he's in BC and I can get stuff over night from him...

The would be deleted from the clean conversation rooms.

Honestly this year I have seen quite a few people riding who worry more about how their sled sounds and a few HP than their riding skills.

And what is your skid set up like? Soft on rear shock and stiffer on front is my guess.

Mind you I ran a 2012 with a 174x3" with 13lbs of boost and never had an issue for 1500 miles.

How did it break? ie: wfo landing on hard pack, wfo up a hill and using a stump for traction..

Clutching will take it away. I like mine with higher engagement, steep up shift and a fast back shift. Green pink, 64gr, 62/42 helix stock spring. I am 190lbs plus gear, 155 2012

Big bore with pipe and can :)

Lol leave them unlock and move them to a section called Measuring Tape, where everyone can measure they deal. Lol

I have hit the snowbank doing 80 and it stopped pretty f'ing quick. Sleds didn't move one bit. I have see a truck that hit the ditch and the sled deck and 2 sleds where secured together 50' in front of the truck up side down. On a trucker note, when you low bed you just keep the stuff from...

Well retail is $475, so I am guessing $425