jeff.page.rides
100 W
- Joined
- Aug 13, 2019
- Messages
- 295
scrolltonowhere said:jeff.page.rides said:scrolltonowhere said:Thank you for that. I have a 250/350W 36v motor I actually rarely use the high gear now after I heard that slipping sort of grinding sound. It seems to only occur when I'm going pretty fast in a higher ger (6 or 7) with higher torque especially while going up a hill. Would you recommend I check the blue gear even if this is basically brand new? I heard it the sound and the slippage I described the first time I took it out for a ride and I was trying to cruise along in 7th gear to see how fast it went.
I'll start on a lower torque while taking off from the stoplights as you mentioned.
The sound you hear is most likely the one-way bearing in the blue gear. Just like all the parts, the quality is not consistent. It can be larger than should be bearing, and or the motor shaft could be smaller. It turns up most of the time when there is too much torque, like riding or trying to take off in too high of a gear. I watch Candance and stay above 60 on a light load and 80 on a heavy load.
Thank you for your assessment of my issue. You wouldn't believe it. Or maybe you will. I don't know much about bikes and I tried to do everything by myself with this 90's bike with old broken components. I finally decided to take it to a local expert down the street at my LBS. I told him about my indexing issues. I couldn't get it just right and it was really frustrating. It turns out there was a little ferule wedged into the rear deraiuller. I thought it was a part of the derailleur but it turns out it was just an old one. I was using that with another feurle. He told me that you want to reduce the amount of these things to improve shifting. He removed the ferule, helped me fine tune the indexing and now the shifting is working as normal. I'm not getting any slipping on the chain or anything like that anymore. So I'm thinking the motor and blue gear are just fine. It's amazing the things you learn IRL :lol:
Next, I noticed that my motor is now in the bottom bracket as firmly as I thought. I can wiggle it up and down very easily with my hands. I realized that perhaps the M33 nut is not as tight as it could be. Perhaps tightening this will improve it and I guess that's the first thing I should try. I think it's time to just buy a crank removal tool.
If the large nut that holds the motor in if it is not completely tightened the case can crack. I hit the wrench hard with a rubber or dead blow hammer.