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WVxNitemare
Well-Known Member
Only difference was the pipes on 85 were less restrictive and not legal over here so they restricted the exhaust and dis something to the intake to make the same power....
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It's just an urban legend.They all made the same power 145 crank.The European Vmax really took a beating on power though.
RaWarrior
Well-Known Member
The myth stems from the fact the '85 had a louder (as in not meeting highway noise requirements) and less restrictive exhaust. This was revised for '86 up.
To compensate, the v-boost tubes got 2mm larger in diameter. Peak power was unchanged(145hp, or ~112 at the tire), though now it occurred at a slightly lower RPM than it did on the '85 bike.
European models lacked v-boost and thus only had like ~90ish hp, to comply with the 100hp restriction.
Japanese models lacked v-boost, and also had a speed limiter(built into the speedometer) that cut ignition to 2 cylinders at 180km/h (112mi/h), per Japanese federal regulation. This is easy to disable though, IIRC you just have to either cut a wire, or short two together since it's essentially just a switch that is tripped by the speedo needle.
I think I'll add this to the FAQ.....
To compensate, the v-boost tubes got 2mm larger in diameter. Peak power was unchanged(145hp, or ~112 at the tire), though now it occurred at a slightly lower RPM than it did on the '85 bike.
European models lacked v-boost and thus only had like ~90ish hp, to comply with the 100hp restriction.
Japanese models lacked v-boost, and also had a speed limiter(built into the speedometer) that cut ignition to 2 cylinders at 180km/h (112mi/h), per Japanese federal regulation. This is easy to disable though, IIRC you just have to either cut a wire, or short two together since it's essentially just a switch that is tripped by the speedo needle.
I think I'll add this to the FAQ.....
KJShover
Proud Vmax lover
If you were to put a pre-neutered version of the exhaust on an 86+ or put the larger vboost on the '85 you would see some additional power.
thor_eyerdhal
Well-Known Member
The 100HP restriction is only for France! Full power bikes for all other european countries...
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