Motorized Bicycle #2 Trek 4500

In the past year I got myself a construction job, paying much better then my old job at a sporting goods store. However, the job We have been working on for most of that time is about 13 miles from my home, and has about 900 ft of elevation both ways. Being an apprentice carpenter, I get to do all the hard stuff, so out right bicycle commuting is sort of extreme for my taste. So rather than not ridding I started going on my first motorized commuter bike. This bike was a friction drive and already was in bad shape, In just a few months it was no longer safe (as if they ever can be safe). So I spent way to much money building a better one. This time a belt drive system on a modern mountain bike with good front suspension. I used the first bike's rear wheel witch was rather newer. 8 x 3 system with an Acera rear derailleur and a Deore front, Deore rear shifter, and a Sram front shifter. Upright, flat, cruiser type bars, Deore hollowtec 2 cranks, and a brooks b67 saddle. The last thing i did was to bolt on my homemade pannier directly to the motor kit, as a bike rack has no place on this bike. The bike tops out at 32mph on flatland and can climb 10% grades without pedal assist at 25mph. on steep hills and when taking off it's best to pedal. I like to think of this bike as a hybrid vehicle "Human and Gasoline."

The motor: I originally purchased
a cloned Mitsubishi 2 stroke motor for this bike for $110 US. It ran well and had plenty of power at 43cc. However, after just 300 miles of use the gas tank sprang a leak, this made my junk warning senses tingle, so I just decided to get the good motor.






The PF-4000 is the motor I replaced the junky one with, and really it's the one I should have started with on a heavily used bike. At $330 it is rather pricy as far as motorized bikes are concerned, but it is more powerful, cleaner, and if it's not quieter, it at least sounds better. The only issue I have had so far is the bolts for the muffler coming out, I had to find the right size on eBay. I have also upgraded the muffler to one meant for a bigger motor, it doesn't effect power, it just dulls the noise a little better. Although for sound the best thing I ever did was get my full face motorcycle helmet, it also keeps me warm and not to mention SAFE (bicycle helmets are not good enough for the speeds and traffic I use this bike For).