Ok Polaris professionals. I have an ‘02 Sportsman 500 that lost the cam. I have the new cam installed and my mechanic buddy has reset the timing 3 times. We have lined up all the Mark’s and it did start this last time, but only when we held the throttle about 1/2 way. As soon as you let off the throttle it dies.

Can anyone give me a sure fire way to get it right? This bike is fun to ride and I want to get it going again. I have several bikes to ride but this one needs to be running if it wants to stay in the garage.

 

As long as you have all the timing done correctly then the next thing is valve clearance.006 for both intake and exhaust
I just did it on mine 02 sportsman 500 Freedom edition

https://www.google.com/url?sa=t&source=web&rct=j&url=%23&ved=2ahUKEwimiaP btr7mAhXXWc0KHUoPDJEQxa8BMAB6BAgAEAI&usg=AOvVaw0VT JzWxrN8ZFOD4xbU2nov6:07
Polaris 500 HO timing marks
YouTube app · humbuckingstrat
Jun 2, 2016

This helps and works not best quality but once you watch it and look at it in person you will get it
sorry for sloppy link copy and paste