Re: Motorized bicycle pre-speed run maintenance
New bike? Old Bike? Wheel bearings are important as well as brakes and other parts.
If it is a new bike we always suggest going through and repacking wheel and pedal crank bearings. The factories seem to be a little stingy with lube in those areas. It goes without saying that if the bike is an older one that you need to disassemble and inspect those same bearings and repack with a quality lubricant.
Brakes? That's a no brainer. Make sure they work and work well.
Good luck but don't be dissappointed if that magic 40 doesn't happen. Keep in mind it's a bicycle, not a motorcycle. 25 to 30 is a good safe speed for a street driven bike.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"