Testimonials

Dial-A-Jet:

"The Dial-A-Jet does what it says and a lot more."    Dirt Wheels Magazine

"We use Dial-A-Jets on all of our world record holders as well as out personal street bikes.  Call us if you want to talk Dial-A-Jet on Harley's."   - Lenny, ABC Performance Cycle 609-743-6555 (holder of 6 world records including World's Fastest and Quickest Hot Street Bike - Harley)

"Every Outlaw Engine that comes out of Whaley Motorsports has a Dial-A-Jet on it.  No Outlaw race has ever been won without a Dial-A-Jet equipped carburetor."  Roy Whaley, Whaley Motorsports

"The Dial-A-Jet works great on any quad.  You can ride from Mexico to Flagstaff and run at peak horsepower without rejetting" - Neil Affinito, ATV Racing, Phoenix, AZ (623-516-8640)

"I have had a KLR650 Kawasaki, and XT550 Yamaha and a TT500 Yamaha with a Dial-A-Jet.  It is the easiest way to take the mystery out of carburetor tuning.  I have worked with carb tuning for many years and Dial-A-Jet has solved all my problems.  I love the low end throttle response.  My fuel mileage on my KLR went from consistent 47 mpg to 52 mpg."  "I am installing Dial-A-Jets on my TDM Yamaha because of my previous success with the product.  My 1995 Triumph Trophy 1200 was the most impressive in my mind.  I installed a Daytona cam, K&N low restriction air filter and opened up the exhaust pipes.  I installed the Dial-A-Jets and had it running absolutely perfect in a little less than one hour.  Great product!" - Don Youngs, Athens, GA

"I have spent a lot of money for more HP for my snowmobiles.  It is pleasing to know that there are some products out there that do give you that extra HP at a very reasonable cost.  I have tried and still use on all my Lake Race motors and High Performance trail motors, “Dial-a-Jets”.  It is the best bang of HP on the market today.  It seems harder to find Manufactures/Dealers that actually know how the product works and is willing to explain it to you.  Lonn, at Thunder Products is one of those individuals. Every time I have called, he has always had the answers I was looking for. Along with other questions I haven’t asked yet.  It’s nice to hear honest knowledge on the other end of the phone. Keep it up Lonn."
Dominic Cantafio, Mechanical Engineer/Journeyman Machinist

"It's so easy to make fine tuning adjustments!"  Denny Henderson

"I took out my Brand X jet kit and installed Dial-A-Jet.  My holeshot is great now!  The Dial-A-Jet made a night and day difference."   Rod McCarn, Benton, AR - 700 Brute Force

"We run Dial-A-Jets on Blaster and Banshee 4 wheelers.  It's unbelievable what a difference they make!  We sand drag our machines and they run great everywhere regardless of temperature or altitude."   Stephen Poe, Antlers, OK

"The Dial-A-Jets made my Banshee feel like it's fuel injected.  Man, I can punch the throttle anytime and it's gone!  I can also ride different areas without rejetting."  Mark Smith, Carthage, TX

"Dial-A-Jet works perfectly for altitude changes.  It helped my ATV a lot." J Slatte, Gardnerville NV - DS 650X

"I am extremely pleased and would recommend Dial-A-Jet to everyone." DC Walker, Oakhurst TX - 500 HO Polaris

"I am very pleased with your Dial-A-Jet.  It fixed problems that nothing else would fix."  D Ungard, Philadelphia PA

"The Dial-A-Jet made a night and day difference in my 750 Brut Force.  Even with my big tires I have plenty of power in high range.  It has more horsepower everywhere."  Jace Matthews, Pacagoula, MS

"I just followed the simple directions for installation.  We rode in New Mexico, Colorado, Wyoming and Utah reaching altitudes as high as 12,000 '.  The Dial-A-jet worked great!   I had all the power I wanted all the time.  I would highly recommend this product to anyone with a carbureted engine."  Chuck Whittle, Travelers Rest, SC - Yamaha Grizzley

"I bought my 700 Ski-doo brand new in 2002 and was never happy with the performance and reliability of the DPM (digital performance management) carburetion.  Unreliable and frustrating were the words I used to describe it.  Rather than sell the sled I removed the DPM system and replaced it with a pair of swap meet 40 mm Mikuni round slides.  Wanting the performance of the flat slide carb I added dual Dial-A-Jets and U.F.O.'s from Thunder Products along with their Thunder Shift kit.  What a ride.  7000 miles later I still hear from my buds, "what have you done to that thing"  My hole shot is great, mileage is 13/15, and she pulls like a freight train between corners.  Thanks Lonn Peterson and all the folks at Thunder products for the support after the sale."  Ken Dumar, Rhinelander WI

"Dial-A-Jet solved all my carburetor problems with my aftermarket carburetor.  The scooter now runs great!"  Jack Brady, Waukegan IL - 2005 Yamaha Zuma 50cc with 70cc kit

"We are very happy with our Dial-A-Jets and TPI Valves.  We ride from 300' to 11,000'." Dwayne Farmer - 350 and 650 Honda Ranchers, Arctic Cat 500

"I am very happy with my Dial-A-Jet.  My engine pulls hard all the time no matter where I am and I never have to mess with my jets anymore."  Scott Hartze, Reno, NV - 2004 Polaris 500 Predator

"The Dial-A-Jet, UFO, Nology Hotwires and TPI Valve products are unbelievable for the performance.  It got rid of all the problems the sled had from the factory.  Easy install; night and day difference." Dave Loiselle, West Sand Lake, NY - 2003 Polaris 440 fan ProX

"Dial-A-Jet has substantially improved throttle response and power on all my bikes as well as made altitude adjustments very easy."  Greg Valdez, Albuquerque, NM - YFZ 450 and 2 Raptor 660's

"As soon as I put the Dial-A-Jet on my machine, the throttle response was great.  It made altitude compensation easy.  I gained power instantly!"  Mike Meister, Baltimore, MD - LTZ400

"I will never jet another carburetor again after trying Dial-A-Jet.  I love the DJ system.  Man, what a difference."  Scott Holcombe, Albany, NY - 2007 Yamaha Grizzley 450

"With the Dial-A-Jet installed on the 125 KTM, it's as fast as the 144 KTM and is easier to ride due to the improved powerband.  We plan to install a Dial-A-Jet on the 144 next."  Jim Samders, Houston, TX - 125 KTM and 144 KTM

"I'm totally pleased and amazed with the results (Dial-A-Jet and UFO)."  Spencer Williams, Sevierville, TN - 650cc Suzuki Savage

"Our family of four each have Polaris snow machines.  My son and I are tuning advocates.  We installed Dial-A-Jets in two of the machines and operated them in the Fairbanks, AK area.  It is a rare pleasure to have a machine that runs well throughout the Fairbanks area.  We like what the Dial-A-Jets do for our machines!"  Dennis Trabant, Fairbanks, AK

"I am writing you this letter to tell you how happy I am with your Dial-A-Jet product.  I didn't think it would work as well as it does, but now I will install it on every machine I buy.  By the way, my mileage went up 30%.  Thanks again."  Jeff Graham, Anchorage, AK - 1996 MXZ

"Dial-A-Jet is a really great product.  We are a small dealer and sold over 50 Dial-A-Jet kits with no problems (if it snowed, we'd have doubled that)."  Mark Porter, Brookings, SD

"I have installed Dial-A-Jets on 5 different machines and every one of them had more power and got better fuel mileage.  The best part is they all ran great at any altitude or temperature without rejetting."  Pete Rushbrook, Prescott, AZ - Assorted Yamaha's and Honda's

2008 Honda Foreman ES with K&N Air Filter, TPI Valve and HMF slip-on exhaust - "Dial-A-Jet brought it all together and made it run at 110%.  I can also ride at different altitudes without changing jets."  Joe Kuhut, Vernon, BC Canada

"Dial-A-Jet is an awesome product.  Throttle response is unbelievable and its easy to rejet."  Jim Fosmire, Santa Marguirita, CA - KTM 505 XCF

"There's a night and day difference since I put Dial-A-Jets and UFO's on my sled.  My biggest problem now is traction."  Jeff Chesnutt - 2003 Polaris XCF440 (Pro-X)

"Throttle response is outrageous.  I can pick the front wheels up in 2nd gear with the throttle.  Dial-A-Jet is an awesome product." Bob Kuhn, Austell, GA - Honda '07 TRX 450 ER

"The Dial-A-Jet and HotWire made an unbelievable difference.  My bike starts quicker and definitely has more power.  Throttle response is off the map!  I highly recommend these products."  Alan Heinrich, SK Canada - Honda TRX 450R

V.I.P. (Velocity Intense Performance):

"My buddy and I both have Pro X 800 Polaris sleds.  After I installed the V.I.P.'s from Thunder Products, he rode my sled and couldn't believe the difference.  Mine was much quicker everywhere."  Charles Jahnke, NY state - Pro-X 800 Polaris

"Overall running quality was greatly improved.  Very quick throttle response.  Best of all, high erratic idle went away."  Jack Reno, Dubuque, IA - 500ss TNT Ski-Doo

"My sled is equipped with VIP's, Heavy Hitters, Air Box Balance Kit and Glide Washers.  The sled is unbelievable fast and every one of these products I purchased from Thunder Products has delivered what I was told or more.  I'm now considering installing Thunder PowerJets and Deep Well Float Bowl Nuts." Mr. Martial Goulet, Quebec, CN - XCR 800 Polaris Triple

Thunder PowerJet:

"I installed UFO's and Thunder PowerJets and went from mild to wild - an absolute night and day difference and my fuel mileage actually improved."   Gary Grant, Ontario Canada - 1991 Wildcat 700

U.F.O. (Ultimate Flow Optimizer):

"The UFO's dramatically improved bottom end throttle response and made my Bull more than competitive with CR250 Hondas/  I won my class (250 Sportsman Novice Western Regional) thanks to the UFO."  Mike Daley, San Jose, CA - '75 250cc Bultaco Pursang

"I'm totally pleased and amazed with the results (Dial-A-Jet and UFO)."  Spencer Williams, Sevierville, TN - 650cc Suzuki Savage

Thunder Shift/Heavy Hitter:

"We were very impressed with the acceleration when we installed the Heavy Hitter clutch weights in our Polaris ATV."  Kevin Cardinal, Cardinal Polaris, Hereford, TX - Polaris 400 Sportsman ATV Modified

"I have an 04 Rev 950 Straightline motor that I spent 3 years trying to get to run right.  I have spent about $2000.00 unnecessary dollars on clutching.  One call to Lonn at TPI and 3 hours later I have a rocket!  Thanks Lonn.  This man knows clutching!!  All for about $400.00."  Mark Groth - LaFayette, NY

Dave Trygstad:  "Thunder Shift Arms are one of the most valuable clutching components you can get!"  
Trygstad Motorsports - Rochester, MN

Glen Kafka:  "Thunder Shift Arms are a must for fine tuning with a multitude of adjustments."
Advanced Clutching - Stratford, WI

Guy Parquette:  "The Thunder Shift Arms sure made it a lot easier to go fast!"
Parquette Racing - Mosinee, WI

Jamie Bellman:  "The Thunder Shift Arms are the most user friendly clutching components I have ever seen."
Bellman Racing - Bremen, IN

John Wheelock:  "The Thunder Shift Arms make the TRA clutch a lot more tunable and consistent."
Pro Line Chassis - Pine Island, MN

Bill Cudney:  “The Thunder Shift Arms are the best bolt on product I’ve ever seen!”
Cudney Racing – Blenheim , ON Canada

Dave Wahl:  “The Heavy Hitter works!”
Wahl Brothers Racing – Greenbush , MN

Kurt Anderson:  “We like the range of adjustability that the Thunder Shift products offer.”
The Crank Shop – Essex Junction, VT

Dale Fett:  “We use Heavy Hitters in all our clutch kits because they get the power to the track!”
Fett Brothers Performance – Frazee , MN

Greg Goodwin:  “The Heavy Hitters adjustability and consistency is unsurpassed.”
Goodwin Performance – Zion , IL

Randy Baker:  “Simply the best tunable weights in the industry!”
RB Specialties – Alexandria , MN

Gary Drum: “The Heavy Hitters work every time, all the time!”
Maxximum Performance – Cohocton , NY

Shane Zeppelin:  “Without a doubt, the Heavy Hitters are the best weights in the industry.”
Maximum Sled Magazine

Dale Cormican:  “The Heavy Hitters are the best working weights I have ever seen.”
C & A Pro - Mentor, MN

Jeff Meidinger:  “The only adjustable weight that allows you to control the whole shift pattern.”
Dakota Performance – Wishek , ND

Duane Watt: “No other weight even comes close!”
Hi-Tech Performance – Litchfield , MN

Jeff Simons:  “The Heavy Hitters are hands down the best weight we have tested!”
Simons C.P.R. - Richfield, WI

Tommy Hill:  “Without the Thunder Shift weights, we just couldn’t go this fast!”
World’s Fastest & Quickest ATV
1/4 mile 8.79 sec. (154 mph)
1/8 mile 5.1 sec (124 mph)  

Jim Jolliffe:  “Great products with tech support to match!”
Micro Belmont - Grand Rapids, MI

"This sled is unbelievably fast since I installed the Thunder Shift Arms and Pin kit. The midrange flutter is gone.  It pulls hard all the way through to top end". - Mike Woods, Slave Lake, AB Canada - 2009 XP800 Ski-Doo

TPI Valve:

     "Thank you for providing us the opportunity to evaluate your TPI Valves.  We installed a set into a 2002 Yamaha SXViper.  Dyno testing was performed in an effort to quantify that the TPI Valves can alter the amount of intake area and resulting amount of airflow.
     As you know, most every snowmobile features an airbox on the intake.  The airbox is quite often restrictive in airflow characteristics, resulting reduced performance.  Many tuners will modify, remove, or alter the airbox in one fashion or another.  By installing a set of TPI Valves into an airbox, the airflow characteristics can be better matched to the carburetion settings.
     In the example of our testing of the 2002 SXViper, our machine produced 116.8 HP with stock jetting and TPI Valves closed (stock airbox characteristics).  After opening the TPI Valves and providing a greater amount of intake area, the SXViper produced 119 HP, reflecting the increase in airflow to better match the fuel flow settings of the carburetors.  We believe this simple test demonstrates typical results an average user would experience in real-world applications.
     Owners of snowmobiles and many other forms of recreational vehicles should benefit greatly from the ability to install these adjustable air valves.  They will allow riders to partially compensate for various conditions that cause a rich fuel/air ratio.  This will result, in improved fuel economy and reduced vehicle emissions as well as increased performance."  Kevin Beilke, Managing Editor, SnowTech Magazine