Skip to main content
our facebook page
Yamaha Rhino Performance Accessories Teryx Kawasaki Teryx, Can Am Commander  Maverick, Polaris RZR XP 900
Local Customers
Products and Accesories
Tech Articles
  
Polaris Clutch Articles
16 Newer Clutch Noise
Grinding Into Gear/Creeping
Gates Belt Fitment
Clutch Shift Speed Explained
Gate C12 Belt Break In
Secondary Rollers
Polaris Secondary Clutch
Wet Clutch Slug Kit
Ranger 900 Clutch Kit
Polaris XP 1000 Clutch Kit
Presales Dalton Kit info
2015- RZR 900 Dalton Clutch Kit
Polaris Primary Bearing Info
Mapping in 3D
Polaris Engine Braking Explained
Duraclutch Tuning Info
Viking Clutch Info
Wolverine/Viking Clutch Kit
Hitting limiter after Clutch Kit
Sheave Coating
Slippery Washers
Belt Temp Gauge
HD XP 9001000 Secondary
Clutch Tool and Lock Plate
High Velocity Clutch Weights
RZR XP 1000 Belt Issues
2016 RZR Clutch Kit Tech
2016 HD Roller Article
Shift RPM Explained Deeper
Duraclutch Pre-Sale Info
Duraclutches and ECU Flashes
Why is top speed important?
Nano Coating Explained
2015-17 900 RZR Belt fitment
Installing Map in PCV
Wolverin Fuel Maps
Inline Clutch Blower
Slow Clutching
Basic Clutch Kit info
Gen 2 Expectations
17 Two Seat Kit Info
Expectations of a Clutch kit
Razorback Belt Temp
Wolverine Sheave Disclaimer
Sheave Tower Machining
Viking/Wolverine Clutch kits
AIS Block Off Plate
Belt Dimensions
HW Belt Thickness Article
HW Belt better than OEM
Clutches good til they are not
Turbo RZR Kit Info
17 and Newer Secondary
Lower Belt Temps
Top Cog Belt Damage
Private Label Belts
2nd Belt Life
Roller Comparison
X2/X4 Sheave Article
White Washer Info
2015 900 Belt Info
Free Install Videos
About HunterworkLLC
Contact
Join Mailing List
Payment Methods
Our Philosophies
International Orders
Site Map
Map To Us
Site Map

We accept all major credit cards and Paypal.
Additional Options
Clutch Shift Speed Explained 

Due to me having to talk about or type in a e-mail or forum what shift speed is, I thought I would just write a tech article to point to on it.

Shift speed is basically the engine RPM the engine runs at all the time under load due to the properties of the CVT clutch system. When we are tuning a clutch this RPM is the main focus of the tuning.

Assuming you have a clutch set up that is in the ball park to begin with then fine tuning shift speed is where it is. Also we use it to determine if you have a big issue with what you have now stock or modified.

To get shift speed, get on flat ground in high range and floor it, watch tach and the RPM where the engine just starts to level out is shift speed. The wide open RPM is not it and wide open RPM can NOT be controlled by clutching unless it is way off like a super stiff secondary spring that will not let the primary open. On a dyno and graphing RPM, you will see RPM ramp up quickly, go flat then ramp up again when the belt is fully shifted out. The flat part of the graph is the shift speed.

Typically with a 800 polaris, we shoot for 6200 RPM at shift speed and on a 900 XP we shoot for 8200 RPM. Modified engines with cam changes etc will operate at a higher RPM  but for the most part and most people these two RPM's is what we are shooting for.

If you ride in the dunes alot or sand, or mud or wherever and you know your clutching is off there, then you need to get shift speed where you ride at so you can tune your clutch for that.

Keep in mind, a clutch tune for sand tires in the sand is going to different than when you get back home and put your stock tires back on. Each tire set will require a different set up which makes the Dalton adjustable clutch kit so desirable, just too easy to change and can be done right on the vehicle.

With a clutch kit assuming you have all matching parts from one company like Dalton, you simply change the weight of the flyweights to affect shift speed. Say you are running 5900 rpm on a 800 and 7900 on a 900 then take one set screw out of the weights to lighten them up to raise the RPM.

On my own vehicle I went to 26x9x12 rear tires and my shift speed went to 8450 to 8500 which is the rev limiter so I had install a Dalton kit and use the set up for small tires which was heavier flyweights which brought my RPM back down to 8200 where I wanted it. Then I could hit shift speed like I was supposed to, no premature rev limiter hitting and my top speed went back up.

One more thing, a clutch kit should never hurt top speed if it does then it is off, way off. Switch brands or adjust it if it is a adjstable kit.

Hope this cleared up what shift speed is.

Todd

Hunterworks Inc.
12097 Kelly Lane

Collinsville, MS 39325
Phone: 601-771-0070
Fax 601-771-0073

Email: todd@hunterworks.com

Our sister site

www.nutnbutbelts.com 

Site Powered By
    Site Manager - Web site design and shopping carts software

google-site-verification: google21ba2559bba4baba.html
Search
 

 Free Shipping DOES NOT apply to Alaska , & Hawaii.nor unless the package can go flat rate USPS 

Free shipping does not apply to international orders either