Parts & Accessories Spare parts Harley V-Rod Throttle Rubbers 2002 - 2017 New set and a very clean used set are available. If you have a problem with sputtering or irregular RPM air pressure, these are often the cause. Any cuts or air leaks will cause this problem, and it is very common in the V-Rod because the rubbers are installed directly on the engine head and are exposed to high heat.