The Viper didn't come with a torque limiter from the factory, the SRX did. Since the Viper & SRX share the same type of engine, you can install an SRX torque limiter on a Viper. These limiters are available used fairly common, and Yamaha also offers the SRX limiter new in kit form for the Viper, although I seem to recall they were on backorder earlier in the winter, not sure of current status. The aftermarket has also made torque limiters for the SRX & Viper, some are adjustable.
I don't think the above will interchange with the Redhead tripple 600/700 in Vmax, SX, SXR, Mountain Max, etc models. The aftermarket may have made a limiter for these models at some point, but I'm not aware of any. You may have to do some more digging to find out, or fabricate something that will work, if you have one of these models.