hey guys/girls just picked up 2 used polaris's and love them loads got a 1994 300cc 2x4 and a 1991 trailblazer 250 cc both 2 wd i wanna upgrade the springs on them the 94 has a blue/yellow spring and the 91 has a black spring my question is what is the best spring for more tourqe and faster take off thanks for taking the time to read this hope to hear from ya all soon

 

Welcome! Send a PM to ftwflh as he's the clutching guru on the forum. He can tell you what springs are best for your needs. OPT

 

You should ask the people where you buy the clutch springs. You tell them if your after more top end or better bottom end and they will chose the proper spring and weights for you since they sell them all the time.

You cant just change clutch spings and leave your stock weights, it all has to work together.

 

If you don't get any answers from other members on your 250 and 300 try these guys at EPI. What few springs and kits I installed mainly came from them and we sold more Epi products than Heel Clicker,etc over the counter. EPI Performance ATV and Snowmobile Clutch Kits: Polaris OPT

 

Thanks for the help giys

 

The first thing to do is look up the numbers on the springs that are in the quads and see what the stall and shiftout speed of the spring is as long as you're sure it's a factory polaris spring.The stall speed determines how much throttle you have to give the quad before it starts moving and the shiftout speed the top end rpms that the clutch will reach.

A primary with a stall speed of 50 and a shiftout of 150 might run better with a little more stall speed of say 60 or 65, but may actually run slower on the top end with a higher shiftout speed of say 175 because it doesn't need the extra RPM's.You also need to be careful not to go too low with the stall speed because if you do the engine will not take off in the right RPM range and feel sluggish, like a car taking off in the wrong gear.

With primary springs you just have to buy a couple of them with different stall and shiftout speeds and find the one that works right for you.At between $20-$30 each they are much cheaper than a clutch kit if you want to put the effort into dialing your quad in yourself.I can't speak for other people but the experience that I've gained in tuning my own clutch is worth its weight in gold IMO.The only other things that a clutch kit comes with is the weights for the primary clutch and a different secondary spring.

Another way to get some extara torque is to switch to a 1 tooth smaller front sprocket or change the rear sprocket to a bigger one with more teeth.

Here's a copy of an old article with some basic advice on how clutches work





Here's a picture of my clutch setup which may be a better reference than the pictures in the article.

 

Is it hard to change the front spocket and would i need a differant chain

 

The front sprocket isn't really that hard to change.My Sports front sprocket is held on by a snap ring so all that you need is a set of snap ring pliers that have an adjustment so that you can position the prongs at an angle to get to the snap ring.With a factory length chain you can go up or down 1 to 2 teeth on the front sprocket without an problems, you just have to adjust the tension on the chain after you put the different size sprocket on.

I don't really have any good pictures of the snap ring on the sprocket but here is the best picture that I have.

 

Dude your bike is sick i want it so jelous