Scooterguy Mount With Tanaka 47R Engine

[5-7HEAVEN]

All my motorized bikes were friction drive...until this center-framed shift kit project.

Now this is all that I'll considerriding.

Once you shift your first gear, you'll understand.

 

[roughrider504]

The last of my parts are scheduled to be delivered tomorrow, so right after work I'll run to the garage and get it together. All I have left are the front sprockets and the rear brake.

Hopefully it all falls in place!

 

[5-7HEAVEN]

Good luck!

Give yourself a few months to sort out the problems.

 

[roughrider504]

The drivetrain is a bit more complicated than a friction drive, but it has to easier to get working right than a HT

 

[roughrider504]

The 49cc 2 stroke really flies with this set-up, I couldn't resist the allure of speed. :helmet:

I'll get some pictures once I finish it up. The derailleur needs a little work.

 

[roughrider504]

Here it is so far. The main problem that presented itself was the bike chain jumping off the front chainring. The crank-forward design of the OP Roller meant I couldn't use a front derailleur, so I cobbled something together.

I left the cables a tad long just in case I want to switch to apes.

Also, I re-arranged the cogs on the cassette so I have three useful gears, which keeps the chainline straight and makes for less downshifting when coming to a stop.

It's a boat load of fun.

 

[5-7HEAVEN]

Your bike looks fantastic!

How many teeth on your cassette?

 

[roughrider504]

Thanks 5-7!

The cogs I put in line were 1st, 3rd and 5th, so I believe that would be 22x32, 22x24 and 22x18. 3rd gear is my overdrive.

The cheapo Shimano cassette was riveted together (for ease of installation), but luckily the rivets drilled out easily.

If I can find an individual Megarange cog, I'll use that as my first. But most are fused together in 3 cog sets.

 

[5-7HEAVEN]

Interesting that you would only choose three of eight gears.

I use first, third and fifth gear to accelerate. For top speed on the flats, I use sixth and seventh gear.

My 11-34t gear cassette was damaged. Since there was no spare, an 11-32t cassette was installed. This proved unacceptable, so two sets of 11-34t cassettes were reasonably purchased. Also looking to install an 80-tooth chainring sprocket for lower first gear.

i have a short, steep hill that gridlocks with traffic. luckily, I can use a narrow footpath on the shoulder to climb the hill. However, if there are pedestrians, I get off my bike and wait for them to pass.

How's your bike doing with hillclimbing?

 

[roughrider504]

I have trigger shifters, and only having to shift up 3 gears makes things easy. I might give myself another gear before 3rd, though.

There are only a couple hills around, and those are train tracks and bridges. I climbed the steepest inclines I have with no problem and the engine revving up nicely in 1st. I guess my hills aren't that bad. Parking garages are steeper.

I even took it off-roading after a day of rain over the weekend, that was pretty fun.

Now if only it would stop flooding every day so I could ride it to work.