Northstar Performance

Snowmobile repair, pre-season service, race set-ups, shock rebuild, stage tuning, & more! SLP, Jaws, BMP, WPS, and RK-Tek authorized dealer.

Huge stock of sport bike and cruiser style Michelin motorcycle tires, Fly, Scorpion, and GMax helmets. Bobster sunglasses, Flydana’s, Highway 21 leather vest, Tire Slime, and a Yoshimura R77 Slip on exhaust with Suzuki bandit link.

Take advantage of this awesome deal from Indy Specialty. This has easily been on the best improvements we’ve made on our Assault.

For the month of May we are going to offer 20% off our primary clutch service making the price $200 for primary clutch service. This service is a CNC cutting and precision balancing and shimming to your desired belt. Allowing for cooler clutches and longer belt life as well as a better engagement and belt grip. Also this is the perfect time to order your clutch kits, covers, springs, and have them professionally installed while your clutch is being serviced. Any additional parts that may be needed are still standard price. Don't forget about those driven clutches also! Start your season off with a fresh start. visit our website at or email us [email protected] for any questions or to place an order.

Dialing in these 850’s

[03/16/19]   In the market for a nice used sled? Check out this awesome 2017 Switchback Assault 800.

Taking advantage of some mid week riding.

Another great day on the 🍊 beast...3” of fresh snow and more on the way!

89 mph...fastest sled so far.

Another day and another axys in the shop for some quick fixes.

2nd annual Super Bowl Sunday ride...Let’s go Patriots!

Apres ski with Veno’s has never looked so good!!

Come grab all the fixings to make the most delicious burgers including our house-made blue cheese dressing!!

Don’t forget we also offer a wide variety of beer and wine!

#apresski #venos

[02/02/19]   Good luck to Gabe Bunke & Bunke Racing, and the rest of the Polaris racer's at the 51st running of the Soo I-500 today!

Fly Zone and Focus Snow Goggles in stock and ready to ship. These are some of the best and most affordable goggles on the market.

SLP pipe and can install on a 2018 SKS 146...

(Sound clip included in the comment section!!!)

[01/31/19]   Good news...Polaris 850 clutch kits are ready to ship!!

Shipping out lots of products today!!

...We apologize for any delays with private messages on here or on HCS. We have been extremely busy as of late. We are doing our best to get everyone’s questions answered and products sent out in a timely manner. Thank you for your patience and understanding.

XCR’s, clutch kits, and a little bit of grease...

Safe to say the Assault is dialed in...🛷💨

Giving an 850 some extra grip!

24” of snow expected in the next 24-36 hours...btw the Assault is feeling dangerous!!

A few photos from a top end rebuild on a 2014 Polaris Switchback Assault 800. Checking ring gap, installing VForce reeds, and cleaning power valves. We also checked and set the tps as part of our detailed service.

Another mountain sled 👍🏻

Another very impressive sled!! 2016 Pro-X 800 with a BMP Pipe/Can and NSP clutch kit.

Not a bad looking lineup...

The battle between 800 and 850 continues...

SLP lightweight silencers for the Polaris 850 Patriot are in stock and ready to ship. $299.95 plus shipping.

850 Indy vs. 800 Assault in back to back testing today. Indy is 100% stock and the Assault has our NSP clutch kit and 114 studs. Both sleds are incredibly impressive!!

Barry’s 2019 Ski-Doo XRS Backcountry 850 is at the shop. This sled will be going head to head against our 2018 Assault 800 and our 2019 Indy XC 850. We will have videos and results in the near future. All sleds are stock. Who do you think will win?

This is why you need to rebuild your Walker Evans shocks after the first 1,000-1,500 miles, and every 2,000-2,500 miles afterwards. The pictures below are a prime example of why this needs to be done...

The first picture shows that the nitrogen charge is about 150 psi, which is 50 psi below what it should be. Excessive wear on the floating piston o-ring/wear band allows the nitrogen to leak by and into the oil in the main shock body. Look at the next few photos and you’ll notice lots of tiny bubbles in the oil that’s in the main shock body and a grayish tint in the oil that’s in the oil pan. This is caused by nitrogen leaking past the floating piston in the reservoir.

Next there are two pictures of wear bands. The first picture is a brand new wear band and the second is the wear band that was in the reservoir. Notice the difference in thickness between the two.

The next group of photos is to show you what goes into our typical shock rebuilds. Nothing goes overlooked here at NSP. We check everything to ensure that the finished product is of the highest quality.

We also attached a few photos of some pitted Walker Evans factory shafts, as well as a HyGear Suspension shock cover install. You’ll notice some damaged threads on the main body of the shock. This was caused by the RTS spring on the external rear shock Polaris sleds rubbing against the shock body.

Be sure to periodically inspect your shocks for any damage or defects. A pitted shaft can tear the seals on the head of the shock body and cause a nitrogen leak and an external oil leak. We replace all pitted shafts with HyGear Suspension shafts. The shocks pictured had 3,000 miles on them and had not been rebuilt previously. Please follow the maintenance procedures on your Walker Evans shocks or be prepared to spend a lot of money on repairs and rebuilds. A typical rebuild, when done on time, is a new charge, fluids, and an o-ring is around $45 a shock.

Polaris 850 SLP silencers available.

Competition series $299.95 plus shipping.
Lightweight series $299.95 plus shipping.

A couple 850’s showed up today...

Ricky Gaudreau of the Conway Police Department is playing in the 2019 CHaD Battle of the Badges Hockey Championship in Manchester NH on March 16th, 2019. Please support his efforts to help the kids and programs at CHaD! 100% of donations go directly to the families.

There is a link below that will redirect you to Ricky's page on the CHaD website. Click the donate now button and choose an amount that you would like to donate. Thank you!

Snow is falling in NH ❄️☃️

Indy Specialty

A pretty cool video of what goes into a full clutch service at Indy Specialty. 😎👍🏻

A short overview of clutch service here at the shop.

Indy Specialty did an incredible job on this primary clutch off our 2018 SBA. Every piece of the clutch has been disassembled, soda blasted, and balanced. The clutch face was also machined to a single angle like the IQr and the new 850’s. Delrin washers were also added to reduce binding in the primary spring. We highly recommend you send your clutch to Indy Specialty for all your balancing and cleaning needs. Reliable performance at a very reasonable price with a quick turn around. Indy also gave us some very nice clutch weights to test for the upcoming season.

Snowmobile season is upon us...this Indy showed up for a 136 extension install, a Doo T-stat install, and a pre season service.

check out fellow granite state rippers #lowbudgetbackcountry on instagram and give them a follow. 👍🏻

Northstar Performance's cover photo

BMP Bullydog install complete on this 17 Pro RMK. A huge thank you to Joey at Bikeman for all his technical support!! Lowbudgetbackcountry Bikeman Performance.

[01/15/18]   2015-2017 Polaris Axys 800 SLP pipe & can combo $650 plus shipping.

2018 Polaris Axys 800 SLP pipe & can combo $650 plus shipping.

2015-2018 Polaris Axys 600/800 SLP competition series lightweight silencer $299.95 plus shipping.

2015-2018 Polaris Axys 600/800 lightweight silencer $299.95 plus shipping.

2015-2018 Polaris Axys 800 BMP single pipe $475 plus shipping.

2015-2018 Polaris Axys 600/800 BMP Full Velocity lightweight silencer $325 plus shipping.

2015-2017 Polaris Axys 800 Jaws single pipe $350 plus shipping.

Installing some VForce reeds on a very cool looking Ski-Doo Renegade. This sled belongs to our good friend Barry, seen here in the camo hat. Barry is a long time customer here and has always been a huge help with small jobs around the shop. Barry is a very special member of our small snowmobiling family and we can’t thank him enough for all that he has done for us!

Finishing up a track change on a 2012 RMK Assault.

Stud Boy and Woody’s carbides for Polaris Gripper, Pro Steer, and Pro Ride skis.

Stud Boy 6” shaper bars for Gripper skis $94.95
Stud Boy 7.5” shaper bars for Pro Steer skis $94.95
Stud Boy 7.5” shaper bars for Pro Ride skis $104.95
Woody’s 6” 60 degree Blazer IV for Gripper skis $79.95
Woody’s 6” 60 degree Blazer IV for Pro Steer skis $79.95
Woody’s 6” 60 degree Blazer IV for Pro Ride skis $79.95

Prices DO NOT include shipping!!

BMP pipe for 2018 800 Polaris Axys/Assault/SKS/RMK. $475 plus shipping.

SLP competition series can for 15-18 800 Axys $299.95 plus shipping.

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1454 N.H. Rte. 16 P.o. Box 171
Conway, NH

Opening Hours

Monday 08:00 - 17:00
Tuesday 08:00 - 17:00
Wednesday 08:00 - 17:00
Thursday 08:00 - 17:00
Friday 08:00 - 17:00
Saturday 08:00 - 12:00
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