Viper engine torque kit instruction sheet

B

Big Block Bill

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I just bought a new kit (hard to find) but it did not come with the instruction sheet. Anyone have a copy I can get? Looks like I have to pull the primary clutch first. Do I need to drill any holes? Maybe someone can post a picture of one installed? Any help would be appreciated.

Thanks, Bill
 
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Is this the OEM/SRX style torque limiter? If so, you can install without instruction sheet, once you start putting parts in place you'll see how everything goes. The holes are already in the frame and on the engine case. You'll want to use SRX clutch alignment specs (clutches parallel), instead of Viper (clutches not quite parallel).

I didn't pull the primary to install mine, I just installed the engine bracket and thru bolt "the other way" and made sure everything cleared the clutch. If you have electric start, may not be an option though, you might have to pull the primary.

Info and pics here to get you started, and there are plenty of other threads here if you want to search for them:
http://www.totallyamaha.net/forums/...r-installation?highlight=viper+torque+limiter
 
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Thank you for the response. I don't understand why I have to adjust the clutches to the SRX specs (which I don't have). Currently they measure about 10.5" center to center with 5/8" of offset between the back of the primary & the back of the secondary. The only reason I am installing the Yamaha kit is to reduce belt consumption. The last oem Yamaha 8dn lasted about 400 miles before it pealed the outer ribbed casing off. I have already went through repairing the broken front mount bolts 2 seasons ago. Do you think this limiter kit will cure its belt issue? I have been riding Yamaha snowmobiles since 1971 and wil never ride anything else. I currently drive an Apex GT, and still own 2 1979 SRX 440's one I purchased new in 1978. This Viper is my 29 year old Son's sled.
 
The Viper specs call for the clutches to be out of parallel by 1mm, by moving the LH side of the engine ahead of the RH side so that it is not quite "square" in the chassis. In theory, and practice, the engine will move/twist backwards on the mounts under load to bring the clutches parallel, or close to parallel. When you use the SRX torque limiter, the engine doesn't have the backwards movement under load, so you want the clutches aligned parallel, just like the SRX specs. The SRX torque limiter solves many belt issues, if your clutches are in good shape and operating properly, it will likely solve yours as well.
center to center is 268.5mm
offset is 15mm non-ER, 20mm ER
 
Thanks again. I look forward to getting this kit installed. We're hedding up to the upper peninsula of Michigan on Friday the 16th. I hope to have an uneventful trip as far as repairs go. Will report when I get back. Thanks again

Bill
 
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