dont worry about it?
while my first engines where zbox, since finding identical motors for half the price, i havent been back.
sounds like a plain old baffle on both sides, and for $90, you could make the same thing with an old cordial bottle on the intake and a piece of steel with a hole drilled for the exhaust.
total cost, nothing...
and then...unless you act like a doodlebrain...cops just laugh.
got a helmet on? stopping at red lights? pushing it, unpowered through shopping centres? they couldnt care less.
doing 70 in a school zone, no helmet, facing on coming traffic, tellin the lil kiddies on iphones to open their eyes, all whilst being a known criminal element...just catch a bus.
i live rural. so one, its sort of a necessity when the license is taken, a hobby otherwise.
if you live in a built up area...start actually pedalling, or show some respect and go electric.
electric has the benefit of producing maximum TORQUE at low rpm. unlike petrol engines that need to run at a certain rpm for a certain torque output.
whats the difference?
they measure the OUTPUT power. power is torque per revolution per minute.
you can dump, say, 48 volts at 100 amp through a motor, while its shaft isnt turning...
thats 4800 watts on the INPUT. now that would make for a nasty electric bike!
but as the shaft isnt TURNING, the output power...is zero! at a complete standstill, anyways.
meanwhile...the torque is there, just trying to twist things into pretzels or move you...
once rotating, then the power input needs some moderating. you can still have gobs of torque at low rpm, and keep within output power.
at high rpm, torque has to obviously be reduced to keep within power restrictions by drastically reducing the current available to the motor.
problem is finding an electric motor and battery capable. and engineering a speed control with the appropriate circuitry. things like cars and planes in rc want smooth throttle control with max power at all rpm...
i notice the new version of one of my esc i tried finding the manual for, has a programmable governor. its only good for 300watt max.
its VERY EASY to intergrate a hall effect twist throttle via two 555's into an RC esc throttle. just pwm
um... oh!
http://www.ebay.com.au/itm/RC-Turni...Radio_Controlled_Vehicles&hash=item257fd0dadd
just find a 250 amp ESC with governor function.
look at the SPECS!
7992 WATTS!!!!!
thats ten freakin horsies! and a very very small pony.