USI Triple Threats

Joined
Oct 26, 2005
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Location
Sylvania, OH (Warwick Ontario Snowmobile Club)
Website
www.klim.com
Country
USA
Snowmobile
2009 Yamaha Apex GT
Does anyone have a recommendation for the set-up of the USI Triple Threats on an Apex. Mounting hole location, stage of fins installed, and what carbine style and length.

I am on my 3rd season and have failed to consider my set-up "dialed in". Any advice would be appreaciated. Thanks
 
Need to know what you are looking for, riding style, type, etc.
 
I have run mine for three years now and have stuck with the stage two front and rear with 6" duce boy carbides and run the spindle in the middle hole. You do not need the duce carbides because they do not dart but will chase a bit at slow speeds, the duces eliminate at all speeds. I ran the power steering plates for two years and they do help the effort a bit but your carbides will wear mostly in the center. To keep them planted in the corners I take most of the transfer out but not all as you would spin too much. I keep more pressure on the front springs to minimize body roll and ski lift. I know this will raise the front end a bit but find it works better than lowering with soft spring set up. I also set the pre-tension on the rear shock to max as I am 6'1" 215lbs. You will never miss a corner!! This works for me.
The only change I would like to make is to lower the front end to flat but keep tight springs, not sure how to do this yet.
 
the kitchen said:
I have run mine for three years now and have stuck with the stage two front and rear with 6" duce boy carbides and run the spindle in the middle hole. You do not need the duce carbides because they do not dart but will chase a bit at slow speeds, the duces eliminate at all speeds. I ran the power steering plates for two years and they do help the effort a bit but your carbides will wear mostly in the center. To keep them planted in the corners I take most of the transfer out but not all as you would spin too much. I keep more pressure on the front springs to minimize body roll and ski lift. I know this will raise the front end a bit but find it works better than lowering with soft spring set up. I also set the pre-tension on the rear shock to max as I am 6'1" 215lbs. You will never miss a corner!! This works for me.
The only change I would like to make is to lower the front end to flat but keep tight springs, not sure how to do this yet.

Pretty much it.

They will steer a bit harder but that's the nature of an aggressive ski. I didn't use the power steering plates because I preferred the more positive steering. For what you ride I would think using them would be fine. Adjusting the mounting makes a huge difference in effort and bite. Remember to check your toe adjustment as well, not sure what is recommended by USI but I would think 3/8" to 1/2" toe out would work. Remember you've got the front strap on the rear suspension to play with as well.
 


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