[ejowrench]

Please bear with me, this is my first snowmobile, new to me. I am at a complete loss, I have a 99 zr700, removed the secondary, pulled out all the shims between the sheaves, belt is riding so high on the secondary and deflection is still over an inch and a half. Brand new Dayco belt. What the hell am I missing? I have crossed referenced the Arctic Cat OEM part with the Dayco part numerous times (AC 0627-020 - Dayco HPX5017)

I do have an alignment bar coming in a few days but I can't imagine alignment is going to affect belt deflection this severely.

Is it possible the sheaves on primary are to far apart (if that's a thing)? And the belt simply rides to low on the primary? I can't find anything in the service manual that defines distance between sheaves on the primary.

I guess parallelism could be WAY off but again, I with deflection of over 1 1/2 inches I can't imagine parallelism will fix that.

View attachment 373659

I use a 0627-035 belt in place of the -020 belt. Expensive belt, but it gives me no grief.

 

[ejowrench]

Is the 0627-035 the same dimensions as the -020? And by the part # I'm assuming that's a AC OEM part.

Pretty darn close, and yes, OE Arctic Cat belt.

 

[ejowrench]

Thanks for everyone's help, I did clean both the primary and secondary using brake cleaner (as well as clean the belt with some standard Dawn dish soap). Check out the difference in belt thickness, Dayco on the left with the OEM belt on the right. The OEM belt definitely fits better and has less belt deflection, after cleaning and removing all of the shims in the secondary I'm going to try it again. I still want to pull the primary and check Center to Center between the two clutches. View attachment 373680

Any way you slice it, that Dayco is the wrong belt. Time to use new references for belt selection.