IN THE CHECKOUT COMMENTS BOX, LET ME KNOW WHAT SLED YEAR, TRACK SIZE, RIDER WEIGHT WITH GEAR. (body weight plus 30 lbs)
Clutch kit for 800etec or 800R Summit 146 to 174
Fuel blends and octane commentary at bottom of page
A video at bottom of the page
Mountains - This clutch kit can be taken to the highest of elevations 13k+feet with only changing the pinweight for the major elevation range differences.
The first time you roll on the throttle, a big engine feel will come through your handlebars.  Your thumb tells you, a tighter connection between the throttle and ground.  A pull from deep in the engine starts to tug on your arms as you hang on through twisty trees, following up and down roly-poly hills to long time full throttle pulls.
Lower engine speed at part throttle and press, then bam... max engine speed, right now and increased track speed with smooth acceleration.
- The kit draws a lot of Turbo power from underneath the hood.
Momentum gained quickly in technical riding, breaking fresh snow.  Ability to run in the trees and have crisp throttle response ready for when you want to pin the throttle.  Keep the momentum with ability to quickly increase track speed and hold it harder than stock spongy clutching mounted with the turbo.
Precision throttle control, with longer time at a lower engine speed to make a decision which gives the confidence to go into places you might have before said (nah!)  The kit renews with more track speed to get through compared to getting stuck with stock clutching.  High track speed and ability to get to 1:1 on the primary clutch when topping out.
200/290 dalton purple primary spring
Mountain ramps (DJ Blend) 415/441
23 gram pin kit
225/330 Dalton Yellow/Orange secondary spring
part that customer supplies  (ask me, i might have some though)
1 set of second (2nd) oversize rollers from FETT Bros
Skidoo - 2mm oversize rollers - at FETT Bros
(with the USA/CAN exchange rate, it drives up the cost too much for me to get them for you and send with a kit- better for you to order them from Thundershift directly)
in Canada can get from http://motsmachining.com/ and call Tom himself and he will have them.
Set 21.5 grams in clicker #3(800etec), #4(800R)
Turn key, pain free.  We took care of everything so you can just install and drive and not fuss with anything except think about finding more deep snow.
$447 Canadian + shipping (tax if applicable)
To find out your country currency today, click on the blue currency convertor button at the top of the page.
Below, my buddy FastZap - one of the most competent, knowlegable turbo tuners I been blessed to know.
Read the caption at youtube so you know what turbo brand it is and also "why" the rider is running around on/off the throttle like he's doing.
Fuel blends and octane
Because of the power shape of the engine, how much bottom end it loses to 5300 rpms and how much power it has past 6700 rpms I had to shape the clutch kit parts to the shape of the engine power. The turbo does not have close the same shape of powerband as a natural aspirated engine.
We found even with the impulse turbo which in my opinion has the most strong bottom end in the rpm range I mention, with the start angle of the D2 helix, it is too big. Loads the engine too hard. So I made a different helix with a lower start angle and did some funky work to that helix to help bottom end accelerate hard and overcome the way all turbos engine manage off the bottom end.
Different boost level and different octane require different flyweight grams.
You need to be consistent with the fuel octane, whatever you are running, have that ratio all the time.
Some owners run out of their fuel then have to substitute their AVGAS for some RACE GAS and then engine speed is off.
It is because they set up the clutching to conform to the shape of the power their blend (example 50 % x 91 / 50 % x Avgas) of fuel provided.
Ran out of Avgas and used race gas 98 to 116 octane. Wait - now the fuel octane shape has changed, then do not expect the engine to run correct engine speed with the applied flyweight.
Be consistent with your fuel blend all the time and adjust the flyweight to get 7900 for your fuel blend.