I wondered the same thing. My scrammy wouldnt start maybe 1 in ever 200 cranks of the electric starter. I tore my engine apart and noticed the spring on the compression release wasnt on correctly. Someone put a new cam im it. I fixed the spring and now waiting on gaskets put i noticed its very hard to pull now but it will go riggt after the compression stroke, it didnt do that before. I hope its fixed.

if you pre-wind the spring you will get way too much return spring tension and your compresion release will not release at idle.. (you can hear it stuck on tapping the valves open when it should be released no suprise this will also effect your abilty to idle and probbly does wonders for the cam follower and the Exhaust valves) the spring return force needs to be very light , that is why he is making such a point as to slightly unwinding the spring so that when you install it will provide just enougth tension to return the compression release back to the dowel pin , But as soon as the machine starts , the cetrifical force on the weight must be enougth too overcome the spring and rotate the rod into the release position. I made the mistake of adding prewind to the spring and had to take it apart again , as it would not disengage the compression release untill I got over 700 RPM

@@brianperkins6121 I’ve learned that the info in this video is entirely wrong. If the spring is modified to increase tension, the engine will run but it makes a hellish racket because the ball beats against the cam rocker. But when installed as per factory specs / spring, it works fine. In short, this video is full of it IMO.

@@russchastain9375 The issue I have experenced myself is replacement cams where the compression release's spring tension was incorrect out of the box,, the spring tension has to be just barely strong enougth to return compression release weight to the dowel pin , otherwise , the compression release wont kick off after the engine starts , tweaking the spring so that it just barely provides enougth counter torque to return the weight to the dowel pin , '"but" not so much counter tension that the centrifugal force acting on the weight will dissengage the compression release at idle , its quite a delicate ballence , I have also had issues with very weak return springs causing the compression release to not work and the starter being unable to overcome full compression .. the design polaris used is very prown to even tiny issues causing issues with its operation .., his point is correct you cant wind a turn onto the spring its return force will be to high , you have to unwind the spring adjusting its tenson if you run into an issue with its counter torque being to low to spring back the weight to dowel pin , you cant wind an extra turn onto the spring the return force torque will end up being so high the compresion release will refuse to disengage and you will also hear the racket it makes in the process.. you should not have to mess with it at all it should just work but in my findings that has not been what I have run into ,,

If the spring exerts to much force , you will have the opposite issue , the compression release will be stuck on at idle , this will cause issues with idle and in many cases you can hear it tapping aka bumping the exhaust valves open. if your increase the engine rpms and this goes away your spring is exerting to much return force,, the spring return force needs to be very light . .

Yes

wow...they obviously didn't set the decompression assembly correctly. That's a real unprofessional move on their part. A magnet on the cam lobe and putting the spring on like oem works perfect. Doing it like the video shows will add to the tension it takes to release the decomp. Definitely don't want to add tension.

Exactly what I have going on.. impossible to pull start

I'm having this issue

yes, take the cam cover off on the side of the head. You'll have to take the valve cover off as well and use a magnet to pull the decomp ball forward so the pin slides all the way in. the cam has a hole in the bottom of the lobe where the ball is made to stick out for the decomp of the left exaust valve.

I pulled the rod out rewound the spring and now the rod stops about a half inch front seating back all the way in

Your check ball is down in the hole, turn it over and see if it’ll fall back down

thank you I tried than and it did fall back down all is good so if anyone ever tried this no way no how can that ball fall out I found out ur good but thanks for thr response

You have to take the valve cover off and use a magnet. Stick the magnet on the cam lobe that has the decomp ball hole so it pulls the ball towards it then the pin will slide in. It's on the exaust side so take off your gas tank and front plastic.

I would half to agree with you he mumbles around for 5 mins can’t see the part then you can’t tell what he doing I was hopeful for a good video explaining this but i just took stills of his close ups to try and tell about how it goes . Also did anyone see how wore out that exhaust lobe is !!!

First , I start my video by identifying MY POLARIS 1998 500. Polaris changes designs like a high schooler changes dresses. The ball in MY POLARIS IS TRAPPED FOR LIFE. SECOND ,MAYBE just maybe by 2022 polaris MIGHT have learned how to make the spring. Obviously they are STILL MAKING DEFECTIVE CAMS .EBAY has page after page of venders selling REPLACEMENT CAMS for polaris. I am a tool and die maker and spun my cam in my lathe. The spring disengaged at 500 rpm, the idle speed is around 800 rpm.This is perfect. Edwin Dirnbeck

@@ed631941. Engine rpm is measured at the crankshaft. The camshaft rotates at half the crank speed. If the compression release stays engaged until 500 rpm on the cam alone then the engine would need to be running at a minimum of 1000 rpm to get full compression. That’s too high. Cam speed is not the engine idle speed.

Then what’s the fix? My 2001 is getting 125psi on compression

​@@thegoodstuff-gs3slwhat's wrong with 125 psi of compression? You mean it's too much and the starter wont spin the engine?

Can that cause the starter to not spin the engine as it should? Or just the pool start?

@@thegoodstuff-gs3slyours probably isn’t closing the spring is loose maybe overheated and took the temper out .