professor
Active Member
Got bored last night, so I dragged the bike in to diddle with switching the rear rim to a 24. Here is a pic. It is an old Huffy moutain, now with a 24 inch sus.front end (snagged from another project). The frame is legnthened 3 inches,
I didn't know if I could fit the stuff in the frame, so 3 looked like a good number.
This will be an e-bike with an onboard gen-set. (It will be able to run off batterys even without the engine on for a little while, if needed) - No range issues with this e-bike, also batterys should last a long time because there will be no depletion cycles- just like a car.
I am using the H.F. 2.5hp because it is the smallest new 4 stroke at a cost I can live with.
Put some pull-back bars on it.
The Delco alternator now has a 24v regulator from a vendor on Ebay.
Stock pulley on the alternator and a 4 inch on the engine. Pulls over fine.
I made a little tray for the 2 batterys and the controller will fit right under that.
I was hemming and hawing about wether to go to friction drive on the 450watt motor or chain. Being that I will use the scooter #25 chain to an intermediate hub, I may as well do the full chain drive like I did on my mongoose.
I had to cut about an inch off the engine output shaft to narrow the deal as much as possible.
I also had no intention of getting this far with the build (spring is a long way off) but the holidays gave me a lot of time to tinker.
Next, the exhaust will sweep up over the engine into a muffler I will make that will go in the frame section behind the engine. It needs to be real quiet. Even though it will be completely legal, the engine will be undercover.
By the way, I put the bike up on a table and lash it from tipping with one of those ratcheting straps- wonderful way to work, weld, paint or whatever(wind the strap 2 times around the top tube and it won't tip).
I didn't know if I could fit the stuff in the frame, so 3 looked like a good number.
This will be an e-bike with an onboard gen-set. (It will be able to run off batterys even without the engine on for a little while, if needed) - No range issues with this e-bike, also batterys should last a long time because there will be no depletion cycles- just like a car.
I am using the H.F. 2.5hp because it is the smallest new 4 stroke at a cost I can live with.
Put some pull-back bars on it.
The Delco alternator now has a 24v regulator from a vendor on Ebay.
Stock pulley on the alternator and a 4 inch on the engine. Pulls over fine.
I made a little tray for the 2 batterys and the controller will fit right under that.
I was hemming and hawing about wether to go to friction drive on the 450watt motor or chain. Being that I will use the scooter #25 chain to an intermediate hub, I may as well do the full chain drive like I did on my mongoose.
I had to cut about an inch off the engine output shaft to narrow the deal as much as possible.
I also had no intention of getting this far with the build (spring is a long way off) but the holidays gave me a lot of time to tinker.
Next, the exhaust will sweep up over the engine into a muffler I will make that will go in the frame section behind the engine. It needs to be real quiet. Even though it will be completely legal, the engine will be undercover.
By the way, I put the bike up on a table and lash it from tipping with one of those ratcheting straps- wonderful way to work, weld, paint or whatever(wind the strap 2 times around the top tube and it won't tip).