I trail ride a 141 MTX. I am a 75/25 on/off trail rider. I assume you have addressed the clutching and gearing. If not there is way more untapped capability in your Viper. The heavy steering is a well-known problem on the MTX and XTX Vipers. Easily corrected with a stiffer front skid shock spring. Search “stingray spring”and you will find plenty of info. I bought my spring from ZBroz Racing but if you contact one of the forum moderators, Cannondale27, he can hook you up with the spring that you need.