These guys boast a 15% increase in HP, but I'm not sure I believe it: Honda Rubicon 500 EFI MAGNUM Dyno-Boost ATV Performance Chip
Other than pipe, fuel contrller, and airbox, everything else seems pretty invasive. I think you'll be going into your engine and gearbox if you want any significant gains.
Larry says 105km with his chip , make sure you are at least a 9.5 rider though .
What kind of chip are you using? Did you do any other mods to get that speed?
Ps that's not a dig against VD.
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You like VD? Lol
No he swears at it.....Not sure which one he uses but swears by it .