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Messages - Uhao

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Tech Help / Re: '20 SR/F pulsating whine ~13-30 mph
« on: September 06, 2020, 01:05:15 PM »
Thanks Richard and Carissa...

Yep, belt tension ~ 70kg & I aligned the belt to track mid point on the sprocket hub. Originally the belt was riding on the flange of the hub...so I re-aligned. Really thought this belt was my cause.

I ran the bike on it's center stand today, the noise is still pulsating @ the lower rpm(s)...seems quieter now that I got my face closer, not the belt!

I have just over 600 miles...how important are the service checks other than my regular observations?

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Tech Help / '20 SR/F pulsating whine ~13-30 mph
« on: September 04, 2020, 02:16:17 PM »
I'm a new eBike rider, never test rode any electric motorcycle or have any other riders (known) w/ eBikes in my community available to compare this pulsating whine ~ 13-30 mph.

I purchased the SR/F based on reviews that I'd researched, the on-line owners manual, the un-official service manual and this valuable forum.

The Zero SR/F surpasses my expectations, and I'm very happy w/ the performance, BUT...thought I had a belt problem that's been limitated and the "pulsating whine ~ 14-30 mph persists". The various speeds are not w/ loads, but cruising along...

Could this be a new bike during a breaking in period?

Zero customer service insists, "return to an authorized Zero dealer". I'm on an Island in the Pacfic w/ no Authorized Zero dealership.

Any thoughts, please? Mahalo

3
Zero Motorcycles Forum | 2013+ / Re: SR/F belt whining noise ~25 mph
« on: August 27, 2020, 01:13:59 PM »
All good info, thanks. I have been calling several Zero service departments, and the ones where I had good conversation, seem to point to..."put some mileage on the bike, monitor the noise/belt (tension & debri) and most likely noise will disappear or lessen.

Maybe reducing the tension to the lower tolerance of the spec and positioning the belt more in the center of the hub as I put mileage on the blke...

4
Zero Motorcycles Forum | 2013+ / Re: SR/F belt whining noise ~25 mph
« on: August 26, 2020, 01:55:14 PM »
Using the Gates gauge takes time getting the right feel...I did rotate the belt, then take another measurements. Just wanted to convince myself belt tension was NOT problem.

I think I need to align the hub so the belt tracks more in the middle, away and not riding so close to the sprocket flange.

Thanks for the comment...I'm hoping someone has had a similar noise.

Stay safe everyone!

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Zero Motorcycles Forum | 2013+ / SR/F belt whining noise ~25 mph
« on: August 26, 2020, 07:57:56 AM »
My '20 SR/F w/ < 300 miles has a pulsing whining noise ~ 25 mph. Zero tech support has said that this problem is very usual...return to dealer for further analysis. I have no dealership within reasonable range due to oceans abound.

Belt tension is within specs (62, 70, 72kg...) using the Gates tension device. Belt is riding near the sprocket (wheel) hub flange w/ ~ 0.004" gap.

I assume I could re-align the hub by adjusting the right/left bolts so the belt tracks on the center...

Wil increasing mileage break in the Gates belt?

Any suggestions?

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