Like most things, a lot of love and care will help your snowmobile run its best. In essence, the secondary simply reacts to input from the belt, and that input is determined b y how the primary is reacting to power output from the engine. Ideally, at wot, the clutching would respond to keep the motor right at that rpm until full shift out has occured. A good way to explain this is to look at how a clutch kit modifies the.
At dennis kirk, you will find the best selection of snowmobile clutch weights. Dalton pro clutch components are marketed in north america and world wide by dealers and distributors. The following filters are the attributes for snowmobile clutch. As anyone who has lifted a snowmobile hood after a few miles of fastpaced riding knows, theres a lot of heat built up. Mds weights are capable of running 012,000 feet and are able to be installed and adjusted with a basic primary clutch knowledge and simple tools. There are two options for clutch optimization a a scientific method, or b a not so scientific. Jul 22, 2010 the clutches and belt are one of the mostimportant systems that determines how well a snowmobile runs. Racers prefer the ease of tuning and proven strength of this clutch and high rpm and high power applications. Jan 18, 2012 if theres no information there, then the best way to tell, is to remove the belt and pull the 6 bolts that hold the primary clutch cover on. Here are five tips to maintain or restore a sleds drivetrain.
Changes can be made in the clutches to accommodate changes in the gearing cant do that in a car. Jul 22, 2015 first off its a cvt system and the gearing is only one part of it. Starting line products high quality performance products. High quality billet steel, gram matched, professional heat treating and blackening process. This is a discussion on clutching for dummies within the the performance tuning shop forums, part of the snowmobiles category. If he has my clutch kit, then the 966 ramp will work. Operating rpm is the rpm your engine runs during full.
If the guy has bone stock clutching he can remove the 965 ramps and install the 966 and they will work. Rich thank you i would like to use this clutching setup on my snowmobile but its custom built and i dont know where i should set it up or how. Understanding the clutch on your snowmobile smart tips. Simple and effective, daltonpro clutch weights are cnc machined from high. Not changing clutching when you add horsepower will result in overrevving. Clutching bigger weights or lighter weights to get the. Rage 3 wide spread pin primary clutch completely redesigned stm rage 3wsp primary clutch features a wider, thicker, more durable spider with our new composite spider roller bushings for long life and quiet operation. Here are some tips on how to maintain your snowmobile for better clutch performance. Then put the factory clutch setup in place as a base line. Then slide the moveable sheave and inspect the weights for tuning rivits in the holes. As the engine begins to accelerate, the clutch weights generate enough centrifugal force to close the clutch, allowing the belt to move freely and transmit power. Ricki describes the basics of snowmobile clutch weights, and when and why you should change them. I can see where all this works although im not quite sure why the belt rides higher on the clutch after gearing down, which is where i believe the higher top end comes from. Ive read everything on this site that pertains to clutching, a lot of info thanks guys.
Weve been in business for almost 30 years developing worldclass cvt clutch kits. If there are no rivits in the weights, then its set up for 10,000. Could someone please explain to me what effects changing the weights and spring in the primary will do, and what to expect, and how changing. Straightline clutch kit with adjustable weight fits arctic cat steel. Epi also offers high quality replacement driveline parts such as axles, ujoints, cv joints, front end and suspension parts, braks and more. Adding more clutch weight or decreasing the top spring load are the two ways to increase primary up shift force. You really need to know the peak output rpm of the engine. In most cases clutch weight is the right answer, because it takes very little weight to add several hundred pounds of load to the belt. Cvt clutch tuning basics part 2 understanding the fundamentals. There are many parts to a snowmobile clutch that must be fully understood before you buy or attempt to replace one of these. The easiest way to explain the snowmobile clutch at a cocktail party is to stand up straight and let your arms hang loose at your sides, now spin around as fast as you can. At dennis kirk, we have the best clutch weights in stock and ready to ship to you today. Nov 27, 2015 im fairly new to ths site and even newer to doing my own clutch work.
Youve come to right place for the best selection of polaris clutch weights. The adjustable feature of these weights allow the tuner to vary engine rpm in distinct phases of the upshift. You will find disagreements on the theory of how clutching is. Outlaw twin pipes for polaris 850 rmk and sks 155 magnum force weights for polaris utv. On some 2stroke snowmobiles you must add clutch weight or rpm will be too low. Ensure you are using warm water when rinsing the clutch. The introduction of new adjustable weights thunder shift kit open up the potential to tune the drive clutch the way it should be done to a finer degree. The clutch guys the belt guys were known by a lot of different names. Snowmobile shows are rife with machinists that have their own version of this. The easiest way to explain the snowmobile clutch at a cocktail party is to stand up straight and let your arms hang loose at your sides, now spin. To help the drive belt, with light pressure, regularly scour the clutch sheaves from clutch to the edge. With all due respect guys, according to jim dimmerman former world champion prostocker, 1 gram of weight added to the primary clutch weights causes a increase of 500 rpms full shift out on a calibrated tach. A snowmobile is a small vehicle that people use in the winter to ride on top of the snow.
The weights are available in twogram increments from 70 grams to 80 grams. If theyre dirty or out of adjustment, a snowmobile wont perform to its potential. Straightline clutch kit with adjustable weight fits skidoo steel. Snowmobile clutch basics american snowmobiler magazine. When riding uphill in deep powder snow, the clutch system keeps the engine at maximum rpm without shifting into a higher. Sep 18, 2008 the company feels that its arctic cat specific clutch weights make the cats clutch system more responsive and puts less load on the drive clutch.
In the end, we had 18 more grams of weight in the primary clutch and had. You can refine your search by selecting one or more filters. You want the highest quality products, but you dont want to have to pay the highest prices. At this point, the snowmobile is in or very close to a 1.
Not only that, but we have them all instock and ready to ship to you today. Physics of snowmachine clutches 1680 words 123 help me. Most small modifications only require adding clutch weight while larger horsepower modifications will require you to change both. Like other vehicles of this type, it has a clutch that is used to adjust its power while you drive. Have any of you guys used the rooster adjustable weights. I think im heading in the right direction but still have questions and dont want to be a pain in the ass. Of course, it follows that a reduction of 1 gram causes a decrease in revs of 500 as well. To help the drive belt hook up, regularly scour the clutch sheaves with emery cloth in a. Let us know your sled and the primary elevation you ride and and well set up your clutch system as well as adjustability for your different elevation rides. Speedwerx the worldwide leader in arctic cat snowmobile and.
Rage 3 wide spread pin primary clutch completely redesigned stm rage 3wsp primary clutch features a wider, thicker, more durable spider with our new composite spider roller bushings for. Goldstar magnetic adjustable clutch weights duration. We carry more snowmobile products than any other aftermarket vendor and have them all at the lowest guaranteed prices. Snowmobile clutch basics october 7, 2010 todays primary clutches are easily divided into two categories. Snowmobile power how snowmobiles work howstuffworks. Removing clutch weights to install rivets, is it hard to do. For the rapid reaction drive clutch, arctic cat and team partnered to design a more durable clutch, with smoother shifting, reduced weight by 0. When the secondary clutch is fully shifted out, the belt is at the bottom of the sheaves. The new design is also rebuildable, meaning no more throw away clutches.
A snowmachine clutch actually consists of two separate clutches connected together by a rubber belt. The weights job is to overcome the force of the primary spring to make the clutch engage and set the peak rpm. Posts on this forum are assumed to be questions aimed at similar model owners, and are not looking for comments of. Snowmobile stm rage primary clutchs stm power sports. The easiest way to explain the snowmobile clutch at a cocktail party is to stand up straight and let your arms hang. A pressure spring holds the primarys two halves apart when the engine rpm is low. Mar 19, 2015 anyone who has attempted to mod their snowmobile by adding a few aftermarket parts probably had to learn that if the snowmobile is producing more horsepower, then the weights in the primary clutch must also be increased or the snowmobile will overrev. Dalton dpa bushed pre04 arctic catcomet flyweights.
Make some wot runs on a surface similar to what you. The evolution of clutching and the cvt american snowmobiler. Clutching and gearing page 10 polaris snowmobile forum. This was a real world example of a 2001 srx 700 in our test fleet. If you drive a snowmobile, atv, utv, golf cart, or other onroad or offroad vehicle venom products has the right products for you. Dalton industries manufactures a wide range of cvt tuning components for snowmobile as well as complete clutch kits for selected atv models applications. Snowmobile clutch tip weight and response explained youtube. If you look at a clutch you will see how the weights swing out against the rollers, this is what causes the clutch to move in, and centrifigural force dictates this shifting out of the weights, along with the primary spring. Snowmobile mods you can do to make your sled perform better. Many clutch weights must be purchased and tested to figure out the correct weight.
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