Question 1

Wheel, Offset Axle & Track Size Guide

Accepted Answer

This information is provided by one of our suppliers of wheels and offset axles.  The diagram in the information refers to their dual offset axles.

Offset axles are generally designed to be run with the offset facing towards the front of the sled. However, in some applications the axle can be run with the offset facing the back of the sled. It can become confusing when you are trying to change the size of your rear wheels, as sometimes you may require a longer track, or special offset axle for certain applications. In this guide we will teach you how to make these decisions so the products you buy are compatible with the ideas you have!

Forward Facing Offset
For application using a forward-facing offset there is some information which must be considered. Forward facing offsets allow for a 1” – 2” increase in wheel Diameter. Wheels should be mounted in “Hole 2” for a 1” increase in wheel diameter and “Hole 3” for a 2” increase in wheel diameter. This means that you can go from a 7.1” wheel to an 8” or 9” wheel, or from an 8” wheel to a 9” or 10” wheel. (NOTE: 11” wheels are only viable in specific and custom applications). “Hole 1” is where the offset axle mounts to the windows of the rails. With a 136” track or longer a 2” offset (wheel diameter increase of 2”) is the maximum amount achievable without any further modifications.
Figure 1.

Backward Facing Offset
Backward facing offset axles are commonly used for drag racing applications. This generally means using a larger rear wheel as well as a longer track. This reduces the friction coefficient of the wheel which conserves horsepower, which is lost in the transfer of energy from the drivetrain to the track. The longer track also improves the traction the track gets. Both scenarios together ultimately enhance the performance of the snowmobile for drag racing applications.
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The problem arises when trying to determine how much extra track length the wheel utilizes, as well as how much track length the backward facing offset utilizes. The next part of this guide will explain how to determine the total track length that is used by these two different situations.
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Firstly, we must determine what the half circumference of the wheel is. The half circumference of the wheel is the surface of the wheel which is engaged with the track which is generally half. The equations and results are displayed below for our oversized wheels.

The next step in this process is to subtract the wheel size you’re currently using from the wheel size which you desire to use. The equation is shown Below.

As an example, if we want to go from an 8” wheel to a 10” wheel you must subtract 12.56 from 15.70 the result of this subtraction is 3.14 inches. This means that your track must be an additional 3 inches longer. However, we must then consider how much track length is taken by the backward facing offset.
​
The distance between “Hole 3” and “Hole 1” from Figure 1 is how much the rail is being extended by (considering where the axle is in the adjustable window of the rail). That distance is 1.65” this number must be multiplied by 2 to become 3.3” the reason we multiply it by 2 is because the increase in relative rail length is equal to 2 times that in track length (because the track of the snowmobile runs in a loop around the rail meaning there is an increase in length on the top and bottom).
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Considering 3.3” and 3.14” from our earlier example; we add those values together to get the total amount the track needs to be increased by, which is 6.44” roughly 6.5”. We find that most people looking to use their sled in drag racing applications have a 137” track and go to a 144” track while also increasing their wheels from 8” to 10”, this is because the additional 7” of track length is taken up by the backward offset and increase in wheel size. It is also important to acknowledge that the window in the rail which the axle is mounted to has roughly 1.25” of adjustability in either direction ([2.5” Rail Window]/2 = 1.25”). This means that in our example if the axle was originally mounted in the centre of the window, we would have 6.5” ± 1.25” of required track length increase, which is 5.25” ~ 7.75”. this means that increasing your track length from 137” to 144” (7” increase) is well within the acceptable range.

Question 2

TAPP Clutch Tuning

Accepted Answer

TAPP Primary Tuning Parts (G = grams)

Allen Screws – 2.6 G
Roller Bolts
            - 1.5” – 5.8 G
	- 1.75” – 6.8 G
	- 2” – 7.5 G
Washers – 1.2 G
Heavy Race Washers – 8 G
Rollers
-          Size 0 (15.5 mm)  – 9.9 G
-          Size +1 ( 16.5 mm ) – 12.5 G
-          Size +2 ( 17.5 mm ) – 15.3 G
-          Size +3.5 ( 19 mm ) – 19 G
Springs
Blue     100 - 190lbs      
Brown  120 – 200lbs
Black   140 - 210lbs      
Red     160 - 270lbs      
Notes:
Allen screws inserted into arms from outside of clutch have largest effect on earlier portion of the shift curve.  Clicker bolt adjustment has largest effect on later portion of the shift curve.  Adjustments must always be made equally on opposing arms.  Each pair of arms can be adjusted differently.

Link to complete tuning manual: https://docs.google.com/document/d/e/2PACX-1vSOWPlR8k3BQv754S8deTnk0eo4WAX9n5jQAh50Oqv-CSmRszt47alUWruK2oTpgTozNLOkLNn-Ki39/pub

Question 3

Belt Sizes for 998 Turbos - Stock and TAPP Clutches

Accepted Answer

AC 998 with stock clutches - model year 2017 - XS827
AC 998 with stock clutches - model year 2018+  - XS829
Yam 998 with stock clutches - all years - XS825
Yam 998 with TAPP primary and stock Yamaha secondary - XS825
Yam or AC 998 with TAPP primary and TAPP 11" Secondary - XS827*
Yam or AC 998 with TAPP primary and 11.25"-11.5" secondary - XS811*

*If you were previously using a TAPP primary with a stock Yamaha secondary and the XS825 belt and switch to the TAPP secondary,  your clutch will need to be re-shimmed for the XS827 belt.  Contact us for details. If you plan to use your new TAPP primary with a 11.25"-11.5" oversize secondary, it will need to be custom shimmed for the XS811 belt.  Please let us know and we will shim your clutch prior to shipping.

Question 4

Flashing Options & Instructions

Accepted Answer

You have options for flashing your ECU and Cluster with our performance tunes.

Option 1:  Send your ECU (and cluster if purchasing a cluster flash) to us for programming.  Be sure to package it carefully.  You may want to ensure the parcel is tracked and / or insured as we are not responsible for loss or damage of your components when they are in transit to us.

Option 2:  Purchase a flash communicator tool and install the flashes yourself as per the instructions below.

Cluster And ECU Removal

The cluster is held into the top panel of the body by some plastic clips molded into a round extrusion on its back.  Remove the vent or accessory bag in front of the steering post to reach the back of the cluster.

Press on the clips to release it from the panel.

The connector is held on by a locking clip on the underside.

Removing the ECU:

Thread on Totally Yamaha:  https://ty4stroke.com/threads/location-and-tips-for-ecu-removal.146926/

OR

If you have purchased or own a flash communicator:

Warning: If you have equipped your sled with an AFR module, always disconnect if before flashing the cluster or the ECU to prevent failure of the flash.

Download the Hurricane Flashing instructions:

Question 5

Flasher Fortress Installation

Question 6

Tune/Flasher Functionality Table

Accepted Answer

This is a table of the different functions available for flashes with single tunes and jukebox tunes (bundles) when the flasher tool is attached verses not attached (or the flasher is not purchased).

Question 7

Cluster Flash Demo Video

Question 8

STM Super Tips Clutch Weight Instructional Video

Question 9

SnowTrax Dalton Clutch Weight Video

Question 10

Yamaha 911 Clutch Cover Installation

Question 11

Yamaha Secondary Clutch Helix Recommendations

Accepted Answer

Our recommendations:

Use stock helix angle for mountain riding
35-39 for trail riding with performance tunes
41 for drag racing with tunes up to 350 hp
40-44 for drag racing with tunes over 350 hp

Question 12

Clutch Alignment Tool Videos

Question 13

Drive Sprocket Installation Diagram - Sidewinder / ZR9000 Thundercat

Accepted Answer

Taken from the 2019 Yamaha Technical Update Manual

Dimensions are in mm.

Question 14

Belt Deflection Adjuster Installation

Accepted Answer

first remove the secondary retaining bolt and aluminium plug at the end of the jackshaft as well as any washers present.
you can now set the belt deflection as desired by either manually raising the belt in secondary or driving the sled at low speed while on a track stand securely.
now loosen the jam screw locking the deflection adjuster dial on threads
screw the dial all the way out to edge of the threads where the head of the retaining bolt will be
install the Hurricane Belt Deflection Adjuster and steel washer included and secure with stock bolt
screw in dial until snug against helix and lighten the jam screw to hold it

Question 15

Sidewinder Clutch Offset Specifications

Accepted Answer

Diagrams and specifications as listed in the Yamaha service manual with our own note added on the spec we have used.

Question 16

Driveshaft Saver Installation Videos

Question 17

Fuel Supply Kit Installation Video

Question 18

Race/Trail Ram Air Installation

Accepted Answer

For maximum effect the stock plenum under the hood centre section that feeds the airbox should be removed along with the rubber seal.  A simple blockoff plate to cover the original inlet where the seal was located should then be affixed as shown below:

Question 19

Secondary Intercooler Installation Videos

Question 20

iGrip Screw Stud Info

Accepted Answer

Detailed information is listed on our iGrip Studs page.  The link is located on each iGrip product listing as well as on the home page if you click the iGrip logo.  Here is our most popular version of the iGrip Screw Stud:

Question 21

Snow Drag Race Chisel Stud Installation Reference

Accepted Answer

All of the studs and wide body chisels listed on our site are designed for installation on 2-ply tracks ONLY!  Should you wish to add traction to a single ply track please refer to our line of iGrip traction screws.  The SS line in particular has yielded great results for us on taller lug single ply tracks (such as the Backcountry X).

The graphics below are installation reference charts for our Snomaxx and Scorpion aluminum race chisels.  If using re-purposed 5/16" studs for bases, their total height should be .875" - 1".  Please refer to the diagrams below.  For the ultimate lightweight  combination, and to save time not cutting your old studs, consider our Titanium Base Studs listed in the Traction section of our on-line store.

Also listed here is a sample installation pattern that has proven to work well for the wide chisels.  It repeats every three rows.  It is merely a suggestion as your best pattern will depend on the number and type of chisels you use and your particular track specifications.

Question 22

How are Ceramic Hybrid bearings better?

Accepted Answer

You can get all the details on our Ceramic Hybrid bearings by clicking the button below:

Question 23

Bearing Cross Reference Chart

Question 24

Sandale 3" Heartbreaker Sound Comparison

Question 25

ISR Drag Racing Rules

Accepted Answer

Download the PDF here:

Question 26

Hellevation Offset Axle Installation Diagram

Tech Support and FAQ

Wheel, Offset Axle & Track Size Guide

TAPP Clutch Tuning

Belt Sizes for 998 Turbos - Stock and TAPP Clutches

Flashing Options & Instructions

Flasher Fortress Installation

Tune/Flasher Functionality Table

Cluster Flash Demo Video

STM Super Tips Clutch Weight Instructional Video

SnowTrax Dalton Clutch Weight Video

Yamaha 911 Clutch Cover Installation

Yamaha Secondary Clutch Helix Recommendations

Clutch Alignment Tool Videos

Drive Sprocket Installation Diagram - Sidewinder / ZR9000 Thundercat

Belt Deflection Adjuster Installation

Sidewinder Clutch Offset Specifications

Driveshaft Saver Installation Videos

Fuel Supply Kit Installation Video

Race/Trail Ram Air Installation

Secondary Intercooler Installation Videos

iGrip Screw Stud Info

Snow Drag Race Chisel Stud Installation Reference

How are Ceramic Hybrid bearings better?

Bearing Cross Reference Chart

Sandale 3" Heartbreaker Sound Comparison

ISR Drag Racing Rules

Hellevation Offset Axle Installation Diagram

Contact Us

Please watch your "Junk" or "Spam" folders for replies. Many
email systems will filter out responses from website responder systems

Tech Support and FAQ

Wheel, Offset Axle & Track Size Guide

TAPP Clutch Tuning

Belt Sizes for 998 Turbos - Stock and TAPP Clutches

Flashing Options & Instructions

Flasher Fortress Installation

Tune/Flasher Functionality Table

Cluster Flash Demo Video

STM Super Tips Clutch Weight Instructional Video

SnowTrax Dalton Clutch Weight Video

Yamaha 911 Clutch Cover Installation

Yamaha Secondary Clutch Helix Recommendations

Clutch Alignment Tool Videos

Drive Sprocket Installation Diagram - Sidewinder / ZR9000 Thundercat

Belt Deflection Adjuster Installation

Sidewinder Clutch Offset Specifications

Driveshaft Saver Installation Videos

Fuel Supply Kit Installation Video

Race/Trail Ram Air Installation

Secondary Intercooler Installation Videos

iGrip Screw Stud Info

Snow Drag Race Chisel Stud Installation Reference

How are Ceramic Hybrid bearings better?

Bearing Cross Reference Chart

Sandale 3" Heartbreaker Sound Comparison

ISR Drag Racing Rules

Hellevation Offset Axle Installation Diagram

Contact Us

Please watch your "Junk" or "Spam" folders for replies. Many email systems will filter out responses from website responder systems

Please watch your "Junk" or "Spam" folders for replies. Many
email systems will filter out responses from website responder systems