Join Date: Aug 2005
Location: Georgetown, ON Canada
Thanked 216 Times in 212 Posts
Sled: 95 ZRT 800 AGLT, 92 Jag 440, 14 XF9000
10-11 Mileage: 800
09-10 Mileage: 679
08-09 Mileage: 1000
07-08 Mileage: 1600
06-07 Mileage: 728
I went through the 2001 manual and didn't really find a definitive answer on this. Inside there should be a spring holding the idlers together to create an hourglass shape in the chain. When tightening that adjustment bolt the only thing really happening is manipulating that hourglass into more of a 'B' shape. In that case it's possible to get rid of the rear idler since the tensioner is taking all the play out.
My 95 never came with the tensioner system and only has the spring holding the idlers together.
My theory on this; I use to have a motorcycle with a chain and I use to tinker a lot, so I was always adjusting the chain tension. I found as I rotated the tire, while it's on the center stand, the chain would actually have tight and loose sections. It was never consistent throughout the entire revolution. I assumed, since it was a fairly new chain, it was more of a characteristic of chains. I figured snowmobile chains would be the same. If the tensioner was adjusted fully at the loose part and was constantly going through a tight section with each revolution it seems to me there would be excessive stress on other components of the system.
I like to adjust it with the chain case cover off until it looks like an hourglass shape, then tighten the lock nut and forget about it. Tightening the adjuster anymore then that doesn't seem productive to me if the spring is installed.