YAMAHOWIE
VIP Member
Does anyone know off-hand if the W-arm is the same on the RX-1 and the Viper ??
LazyBastard
TY 4 Stroke God
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Probably same, check here: http://www.yamaha-motor.com/sport/parts/home.aspx
YAMAHOWIE
VIP Member
Thanks LB.. The first 3-numbers for the RX-1 are 8DF and for the Viper it is 8CV the rest of the numbers are the same.... still not sure 

SARGENT
Extreme
the viper w arm will bolt in a rx1. same part just missing the lame added steel. much easer to mod for strength & cost less. had to put 1 in, in a bind on a long trip.