ENDURO EEB: Help me get rid of high speed wobble

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rockstar195   100 W

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ENDURO EEB: Help me get rid of high speed wobble

Post by rockstar195 » Oct 18 2019 8:12pm

ENDURO EEB: 19" wheels, heavy battery 20S20P, rider is 150lbs, 72150 Sabvoton, QS 205 3.5T, DNM RCP 3, Fox 40

Somewhere over/around 40 mph, the bike starts to wobble. The tubes have green slime in them. I've been trying different things to get rid of the wobble.

1) True/Round/Balance wheels
2) Raise Rear
3) Change Rear Spring from 650lbs to 750lbs
4) Change Suspension settings
5) Increase tire pressure

I've tried #1 only with the front tire to balance but had no luck because of the green slime. Can't balance the rear because of the hub motor. I've tried #5, no luck.
Need any and all ideas. Help me get rid of the wobble.

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serious_sam   100 W

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Location: Australia

Re: ENDURO EEB: Help me get rid of high speed wobble

Post by serious_sam » Oct 19 2019 3:53am

Sounds like you need more suspension tuning tips from flat tyre. The last lot of advice you took from him sounds like it's working out great. :lol:

viewtopic.php?f=2&t=102244&p=1495481#p1495300

Yermommy   1 W

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Re: ENDURO EEB: Help me get rid of high speed wobble

Post by Yermommy » Oct 19 2019 5:43am

Are you running tubes or tubeless tires? Are the wheels balanced with weights? The centrifugal forces the wheel goes through at 40+ are not always apparent at lower speeds and I suspect this may be what is happening.

Jonno   10 W

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Re: ENDURO EEB: Help me get rid of high speed wobble

Post by Jonno » Oct 19 2019 6:31am

Try 720mm or wider handlebars for more stability

Jonno
EEB frame, 888 forks, QS273 40h V3 , Nucular Electronics 24F controller, 84V @ 36ah 26650 cells, Vortecks 300a BMS, Hope 203mm + Regen braking

litespeed   100 kW

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Re: ENDURO EEB: Help me get rid of high speed wobble

Post by litespeed » Oct 20 2019 12:23pm

You definitely do NOT need slime in your tires with motorcycle tires. Get rid of that mess. If you have tubs just replace them. Wonder if your slime stuck to one part of the tire/tube?

After that balance your front rear tires. If it’s just over 40 mph suspension and the rest aren’t the issue unless it’s anything else than a smooth road your on. Keep it simple.

Tom
I'm married so you know I'm no stranger to pain!

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DogDipstick   1 kW

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Re: ENDURO EEB: Help me get rid of high speed wobble

Post by DogDipstick » Oct 20 2019 11:56pm

Is the bike "weaving" and "wobbling?"

or just "wobbling"? If you are weaving, too, there are bigger problems.

Is it a "tank slapper" that gets worse ? Or does it go away at a certaing speed?
Allota Watts @ 83.1v of raw QS power takes me everywhere on my Ironhorse DW link XC... :) Powered by Chevy. :D Broke 10 horses the other day. ( BTW; ...don't get hurt... :? )... (Currently building a battery datalogger.). :roll: Playin with (24) IRFB4115s now. :wink:

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