Hi,
I once went there when I wanted electrical for silence, but never built it because it was expensive and batteries were too much of a problem.
Gas makes more noise, so I couldn't take the shortcuts at night anymore. But running longer distances, and probably faster, It would probably end up as quick.
So I'm back, but this time, I'll go gas!
I just got an idea that may work on my bike, and I'd like to know what you think about it.
Ok, what are the requirements?
- Low noise
- Steep hill climbing
- Cheapest
- Ultra simple
- Shouldn't look aggressive.
So I want a 4 cycles. To go cheap, I'd buy the Harbor Freight 2.5HP 80cc or 6.5HP 200cc. Which one should I choose? I have very steep roads where I live (up to 15% easily and maybe more!).
I don't want a frame mount because I'd like to avoid the "motorcycle" look, and avoid policemen questions too.
I though about rack mount. These motor are not that small and light (especially the 6.5HP!) and I fear having 35lbs just right behind my back for gravity center reasons.
The last solution was push trailers. They require way more metal work, not that easy to make. They are too large and ugly to my taste.
I then realized I had 2 mounting holes near my rear wheel hub, symetrical. Maybe for rack mounting.
I would then just have to screw a tube on each side, and make a push trailer directly attached there, saving this big ugly curved tube attached to the seat, and making build WAY more easy and good looking.
Then I simply thought: why not just make a trailer, with a non-motored wheel? Put the motor on it, a gear of the left of the rear wheel, and run a chain between both?
This way, I have something working like a rack mount, but on a trailer, with low gravity center. I can have the motor very close to the wheel saving space, metal work is ultra simple, and the build looks rather innocent.
My questions are then:
Should I choose the 2.5HP or the 6.5HP motor?
Should I mount this trailer on an horizontal axle or not? Not having one may cause problems on irregular roads. Having one may let the motor assembly bumps. The mounting axle being 2-3 cm appart the rear wheel axle, may it cause problem with chain lenght? Mounting without an axle but using suspension on the trailer wheel wouldn't be a (complicated) solution?
The ultimate solution to the last question may be not to add a wheel for this trailer, in fact, not make a trailer, just make a rack at the place of a trailer. Do you think tubes attached on each side, with two mounting points 40cm appart, would handle motor weight and vibrations?
Is there something special about this build that you think I should think about?
I have no experience, I just am thinking at how I could create it to reach my goal. In fact, the solution I stressed in bold would be my preferred: costs nothing, ultra simple, should work well.
Oh last question: Would using a belt instead of a chain reduce noise much? Are they easily available and cheap?
Thank you,
Nicolas
I once went there when I wanted electrical for silence, but never built it because it was expensive and batteries were too much of a problem.
Gas makes more noise, so I couldn't take the shortcuts at night anymore. But running longer distances, and probably faster, It would probably end up as quick.
So I'm back, but this time, I'll go gas!
I just got an idea that may work on my bike, and I'd like to know what you think about it.
Ok, what are the requirements?
- Low noise
- Steep hill climbing
- Cheapest
- Ultra simple
- Shouldn't look aggressive.
So I want a 4 cycles. To go cheap, I'd buy the Harbor Freight 2.5HP 80cc or 6.5HP 200cc. Which one should I choose? I have very steep roads where I live (up to 15% easily and maybe more!).
I don't want a frame mount because I'd like to avoid the "motorcycle" look, and avoid policemen questions too.
I though about rack mount. These motor are not that small and light (especially the 6.5HP!) and I fear having 35lbs just right behind my back for gravity center reasons.
The last solution was push trailers. They require way more metal work, not that easy to make. They are too large and ugly to my taste.
I then realized I had 2 mounting holes near my rear wheel hub, symetrical. Maybe for rack mounting.
I would then just have to screw a tube on each side, and make a push trailer directly attached there, saving this big ugly curved tube attached to the seat, and making build WAY more easy and good looking.
Then I simply thought: why not just make a trailer, with a non-motored wheel? Put the motor on it, a gear of the left of the rear wheel, and run a chain between both?
This way, I have something working like a rack mount, but on a trailer, with low gravity center. I can have the motor very close to the wheel saving space, metal work is ultra simple, and the build looks rather innocent.
My questions are then:
Should I choose the 2.5HP or the 6.5HP motor?
Should I mount this trailer on an horizontal axle or not? Not having one may cause problems on irregular roads. Having one may let the motor assembly bumps. The mounting axle being 2-3 cm appart the rear wheel axle, may it cause problem with chain lenght? Mounting without an axle but using suspension on the trailer wheel wouldn't be a (complicated) solution?
The ultimate solution to the last question may be not to add a wheel for this trailer, in fact, not make a trailer, just make a rack at the place of a trailer. Do you think tubes attached on each side, with two mounting points 40cm appart, would handle motor weight and vibrations?
Is there something special about this build that you think I should think about?
I have no experience, I just am thinking at how I could create it to reach my goal. In fact, the solution I stressed in bold would be my preferred: costs nothing, ultra simple, should work well.
Oh last question: Would using a belt instead of a chain reduce noise much? Are they easily available and cheap?
Thank you,
Nicolas