Why is my hub motor skipping lightly when accelerating

[recumbent]

Ever since i changed the front tire on my bike, the motor has been pulsating on acceleration?

Sort of like missing a beat, perhaps a hall sensor signal not getting a good connection.

Works wonderfull otherwise, if kept under 700watts. And when the motor skips a beat it's only here and there for a milisecond at a time. Even the top- speed is the same.

I cleaned and checked all the connections, the only thing left is recalibrate my Cycle Analyst for my new tire.

 

[mwkeefer]

Is there any noise from the hub when it "skips" a beat?

Not sure why cycle analyst would give you trouble or could cause this issue - have you tried without cycle analyst to rule it out?

-Mike

 

[dogman dan]

Sure walks and quacks like a bad connection duck somewhere. The wonderfull thing about it is, it could easily have nothing to do with the tire changing. So look at everything on the bike.

 

[recumbent]

Is there any noise from the hub when it "skips" a beat?
- have you tried without cycle analyst to rule it out?

Yes it does make a noise, the familiar "thud" noise of a missed electrical pulse. Like the motor is cutting out for a millisecond. But works fine otherwise.

I've never unplugged the cycle Analyst, i thought it could be an current over-ride, perhaps trying to tone it down. Because it only happens over 1,000 watts.

Just wonderin if this will put strain on other components, which have over 8,000kms, or (5,000mi)

 

[nineball]

thud....sounds like a bad hall or connection to it

look for a rub/break where it goes in the hub/axle