TopCat
100 W
If its not broken dont fix it.
I should have heeded that old saying and left well alone.
Last night I sat thinking about this freewheel malarky until my head hurt. Today I thought bugger it it'll do, the motor will just have to continually turn as it did before I added the freewheel, So I spent the afternoon fixing my on my - Towbar/rack/battbox.
Once I had everything wired up I turned the throttle and found that the freewheel was freewheeling not driving.
ooh, lightbulb moment.
After a few whacks with a hammer n' chisel I had the freewheel assembly off, flipped around and hammered back on.
I reconnected the batt wires and crossed my fingers as I turned the throttle. Whoooopeee the motor was driving and freewheeling as it should. Problem solved - or so I thought!
I took the bike for a spin around to my mates a few streets away. He wasn't in so I just kept going around the block a few times and back home. During the short trip I thought that the bike didn't accelerate as quickly as before, it also seemed to take longer to get up to speed?
When I parked up the bike I noticed smoke comming from the motor? I put my hand on it and nearly took the skin off my fingers. I put my hand on the battbox in the area where the controller sits and could feel that this was warm as well?
I never had any smoke/heat problems (motor or controller) when I had this setup with the 11 tooth motor cog and 54 tooth minimoto sprocket.
Here's me thinking that I'd improve things by adding a freewheel (to create less motor drag) and moving the motor. NOT!!!
This heat/smoke problem is probably all to do with Cog/Sprocket ratio? but im no good with all these calculations?
I need to get naked to count to 21 :lol:
If it is a ratio problem, I have a few options to try...
1. The sprocket on the rear wheel is 49 tooth I think? I can swap this for a 45T. I got both these from SoSauty ... http://endless-sphere.com/forums/viewtopic.php?f=28&t=22908
I'll need to file out the center of the sprocket so it slips over the hub.
2. Try the pedal crank of a kiddies bmx type bike. I'd have to file this out also but its roughly the same size as the minimoto sprocket.
Finally option 3. Do away with the freewheel and weld the 11t cog back onto the motor, put the minimoto 54t sprocket back on the wheel and get a longer 8mm pitch chain.
I cant remember walking under any ladders or smashing any mirrors but this project seems jinxed?
Regards
Tom
I should have heeded that old saying and left well alone.
Last night I sat thinking about this freewheel malarky until my head hurt. Today I thought bugger it it'll do, the motor will just have to continually turn as it did before I added the freewheel, So I spent the afternoon fixing my on my - Towbar/rack/battbox.
Once I had everything wired up I turned the throttle and found that the freewheel was freewheeling not driving.
ooh, lightbulb moment.
After a few whacks with a hammer n' chisel I had the freewheel assembly off, flipped around and hammered back on.
I reconnected the batt wires and crossed my fingers as I turned the throttle. Whoooopeee the motor was driving and freewheeling as it should. Problem solved - or so I thought!
I took the bike for a spin around to my mates a few streets away. He wasn't in so I just kept going around the block a few times and back home. During the short trip I thought that the bike didn't accelerate as quickly as before, it also seemed to take longer to get up to speed?
When I parked up the bike I noticed smoke comming from the motor? I put my hand on it and nearly took the skin off my fingers. I put my hand on the battbox in the area where the controller sits and could feel that this was warm as well?
I never had any smoke/heat problems (motor or controller) when I had this setup with the 11 tooth motor cog and 54 tooth minimoto sprocket.
Here's me thinking that I'd improve things by adding a freewheel (to create less motor drag) and moving the motor. NOT!!!
This heat/smoke problem is probably all to do with Cog/Sprocket ratio? but im no good with all these calculations?
I need to get naked to count to 21 :lol:
If it is a ratio problem, I have a few options to try...
1. The sprocket on the rear wheel is 49 tooth I think? I can swap this for a 45T. I got both these from SoSauty ... http://endless-sphere.com/forums/viewtopic.php?f=28&t=22908
I'll need to file out the center of the sprocket so it slips over the hub.
2. Try the pedal crank of a kiddies bmx type bike. I'd have to file this out also but its roughly the same size as the minimoto sprocket.
Finally option 3. Do away with the freewheel and weld the 11t cog back onto the motor, put the minimoto 54t sprocket back on the wheel and get a longer 8mm pitch chain.
I cant remember walking under any ladders or smashing any mirrors but this project seems jinxed?
Regards
Tom