Sur-Ron - New Mid drive Bike

DanGT86 · Apr 20, 2018

Raisedeyebrows said:
One of these certainly would look good on one of the green bikes.

Green is definitely the right color for those $$$$. Would be a hard sell considering they cost half as much as the entire bike. Also pretty rare around here where 90% of bikes run a $400 DNM.

ES is not exactly full of suspension snobs.

3DTOPO · Apr 20, 2018

Enginepy said:
Does anyone have thoughts on the must-do upgrades? (chain, tires, handlebars, lights, etc).

Here are my first upgrades/accessories. I have a 3" riser handle bar on order:
https://amzn.to/2qNo8cF

Front fender. I cut off the rear of it, and had to trim a little plastic off where the fender was making contact with the fork:
https://amzn.to/2HPKBh8

Mount for my GPS/dog tracker:
https://amzn.to/2HgwKn1

Some velcro straps to hold the included toolkit. I added a Bic lighter in case I get stranded and need to start a camp fire. :wink:

Luna's space blanket. Got extra large:
https://lunacycle.com/luna-space-blanket-bike-cover/

I also plan on adding 3" tires at some point.

3DTOPO · Apr 20, 2018

jph3 said:
I still have one issue with the red bike... power is either on or off based on the cable coming out of the Computer, and if it moves I lose all power to the bike. Not sure if I am going to have to break it open, or replace the entire thing, but its not looking good for that bike right now.

Does anyone know how the break cut off circuit works? I would like to know how to by-pass it in an emergency (and the kickstand switch for that matter too).

It would suck being stranded 20-miles out in the wilderness from one switch.

Raisedeyebrows · Apr 20, 2018

efMX Trials Electric Freeride said:
Raisedeyebrows said:

One of these certainly would look good on one of the green bikes.

Click to expand...

question for Sur-ron dealer / distributors :

what is the headset size / standard used on light bee, 1.5 standard, 1 1/8 standard, tapered, integrated or external bearing cups.. this will be a factor in what after market forks can be fitted (and headset bearing / frame head tube durability)..

example : motoped uses 1.5 head tube standard with 1.5 to 1 1/8 reducer cups and external bearing cups..

motomoto did you ever disassemble your headset for damage inspection after the double jump??

reference : https://www.parktool.com/blog/repair-help/headset-standards#article-section-9

Yeah curious too do these bikes come with straight steerer tube fork?

Rix · Apr 20, 2018

efMX Trials Electric Freeride said:
Raisedeyebrows said:

One of these certainly would look good on one of the green bikes.

Click to expand...

question for Sur-ron dealer / distributors :

what is the headset size / standard used on light bee, 1.5 standard, 1 1/8 standard, tapered, integrated or external bearing cups.. this will be a factor in what after market forks can be fitted (and headset bearing / frame head tube durability)..

example : motoped uses 1.5 head tube standard with 1.5 to 1 1/8 reducer cups and external bearing cups..

motomoto did you ever disassemble your headset for damage inspection after the double jump??

reference : https://www.parktool.com/blog/repair-help/headset-standards#article-section-9

Its a standard 1.5" top and bottom. I don't know if there are reducer cups as I haven't taken the forks off. I can tell you the fork tube is a 1 1/8 diameter and uses a regular clamp style MTB Stem.

Rix · Apr 20, 2018

58T Sprocket? Check, Renthal Chain 420 pitch Check. Power wheelies? Check. So my indicated speed is 76Kh/H with the 58T. We all know that aint correct. Took it down the road to a police radar trailer which confirmed top speed at 36MPH. It would appear that speed is measured off the motor. Anyone going to a 58T sprocket, just subtract "30" from your top speed in Km/H and you will have your MPH speed.

I know Motomoto is making some super sexy light weight aluminum 58T sprockets, but if any one wants a steel 58T sprocket, I got 2 available for $45 bucks plus shipping. BTW, Motomoto, when will your 52T be ready?

jph3 · Apr 20, 2018

Rix said:
BTW, Motomoto, when will your 52T be ready?

Looking for a couple 52’s as well! They are looking good Kim!

motomoto · Apr 20, 2018

I finished the 58 tooth sprockets in black and pewter. The 52 tooth sprockets will be finished tomorrow in clear and pewter (dark gray)

I want to protect the raw 7075 material that is exposed from rounding the pocket edges. One metal finisher says alodine after the
anodize and another one says it will come off and he says he has a customer that protects the raw aluminum with polishing wax.

7075 isn't as corrosion resistant as 6061 which also corrodes. I just want the sprockets to look good in a year or two and not just now.

Aebrennan · Apr 21, 2018

The steerer tube is 1 1/8 straight, the frame headtube is tapered 44mm and 55mm.

Rear tyres can be 95mm wide, i run Dunlop MX71F and they are 84mm with 9mm clearence from the chain.
The front is super tight with this tyre, but does still clear fork tubes.

The brake/throttle cut sensors are annoying, usually only fitted finger tight they should be easy to unscrew and remove if you get stuck.
After getting caught out i removed them completely, they plug in behind the keyswitch cover.

Rix · Apr 21, 2018

3DTOPO said:
Enginepy said:

Does anyone have thoughts on the must-do upgrades? (chain, tires, handlebars, lights, etc).

Click to expand...

Here are my first upgrades/accessories. I have a 3" riser handle bar on order:
https://amzn.to/2qNo8cF

Front fender. I cut off the rear of it, and had to trim a little plastic off where the fender was making contact with the fork:
https://amzn.to/2HPKBh8

Mount for my GPS/dog tracker:
https://amzn.to/2HgwKn1

Some velcro straps to hold the included toolkit. I added a Bic lighter in case I get stranded and need to start a camp fire. :wink:

Luna's space blanket. Got extra large:
https://lunacycle.com/luna-space-blanket-bike-cover/

I also plan on adding 3" tires at some point.

Missed this earlier, front fender looks good. Like the way you attached the tool kit to the frame.

Rix · Apr 21, 2018

motomoto said:
I finished the 58 tooth sprockets in black and pewter. The 52 tooth sprockets will be finished tomorrow in clear and pewter (dark gray)

I want to protect the raw 7075 material that is exposed from rounding the pocket edges. One metal finisher says alodine after the
anodize and another one says it will come off and he says he has a customer that protects the raw aluminum with polishing wax.

7075 isn't as corrosion resistant as 6061 which also corrodes. I just want the sprockets to look good in a year or two and not just now.

Isn't anodizing the best for toughening up aluminum?

3DTOPO · Apr 21, 2018

Rix said:
Missed this earlier, front fender looks good. Like the way you attached the tool kit to the frame.

Thanks! I also added a under bicycle seat bag that fits practically perfectly. Size medium:
https://amzn.to/2qPFUfi

I attached the back of the bag with a zip tie:

With the other straps around the seat frame:

I needed something since the MX pants I got don't have any pockets! My jersey doesn't have any pockets either. :wink:

3DTOPO · Apr 21, 2018

Aebrennan said:
Rear tyres can be 95mm wide, i run Dunlop MX71F and they are 84mm with 9mm clearence from the chain.
The front is super tight with this tyre, but does still clear fork tubes.

Nice. What size MX71s?

Aebrennan said:
The brake/throttle cut sensors are annoying, usually only fitted finger tight they should be easy to unscrew and remove if you get stuck.
After getting caught out i removed them completely, they plug in behind the keyswitch cover.

Thanks! So if the wire is cut it is allowed to run? Or does it have to be jumped?

Aebrennan · Apr 21, 2018

I have fitted 100/70 in 19inch, they are a front tyre suited for a big wheel 85.
Probably 3 times heavier than the CST factory fitted tyre, but 3 times the rubber.

Sur-ron have advised that you can cut the brake sensor wiring, although i chose to unplug and remove them completely.
Remove the cover surrounding the keyswitch and unplug the connectors, then unscrew the flare nuts at the levers.
There may also be a grub screw securing the sensor in the body of the master cylinder.
The bike looks a lot neater too.

motomoto · Apr 21, 2018

Isn't anodizing the best for toughening up aluminum?

Sure, but I have this bling obsession to cut the chamfers or in this case corner rounding after anodizing. You can't anodize
over anodize. I will rub the bare surfaces with a polish that also leaves a protective film. Done.

I will be selling the sprockets at www.sur-ronusa.com about Wednesday

Rix · Apr 21, 2018

Aebrennan said:
I have fitted 100/70 in 19inch, they are a front tyre suited for a big wheel 85.
Probably 3 times heavier than the CST factory fitted tyre, but 3 times the rubber.

Sur-ron have advised that you can cut the brake sensor wiring, although i chose to unplug and remove them completely.
Remove the cover surrounding the keyswitch and unplug the connectors, then unscrew the flare nuts at the levers.
There may also be a grub screw securing the sensor in the body of the master cylinder.
The bike looks a lot neater too.

I just ordered 2 Bridgestone M403 70/100-19 tires for mine. They weigh about 5.5 pounds each. I don't know how much the stock CST tires weigh, but I bet they are heavier than Duro's 24x3.00 Razorbacks which come in at just over 3 pounds. That said, it shouldn't be much of a weight gain, maybe 3 pounds overall.

efMX Trials Electric Freeride · Apr 22, 2018

SUR RON POWER SYSTEMS for DIY and electric motorcycle companies :shock:

8)

"Sur-Ron has expanded their product line to electric motorcycle Power systems ( components ) used in Light Bee and other prototypes for buying as an individual product. Sur-Ron now offers a variety of power systems: Electric motors, FOC Electric controllers, and full power systems ( motor + controller )"

https://evnerds.com/electric-vehicles/e-motorcycle-news/sur-ron-power-systems-for-diy-and-electric-motorcycle-companies/

Rodney64 · Apr 23, 2018

Do we have any Sur Rons in Perth. No sure if the stock chainring will handle Perth sand or if the motor will over heat.

Rix · Apr 23, 2018

Rodney64 said:
Do we have any Sur Rons in Perth. No sure if the stock chainring will handle Perth sand or if the motor will over heat.

Hey Rod, I can tell you the stock gearing does handle semi soft sand with little drama with my heavy weight. If the sand is really soft and deep, no go though. That said, the 58T rear sprocket changes the game. It will handle fairly deep sand, but it will suck the amps doing it. I just rode mine this weekend with the 58T and can believe the level of hill climbing and soft terrain performance it has. Even my Alpha with an 18"MC wheel running north of 8KW will not touch the hill climbing capability of this bike with the 58T. Don't get me wrong, this bike did stall out on me on some really steep stuff, the kind of stuff I wouldn't have even attempted on a hub driven machine.

artisanstone · Apr 23, 2018

Luna now has a 60T aluminum sprocket available I'd just as soon have steel for durability. Don't think much difference between 58 and 60.

artisanstone · Apr 23, 2018

efMX Trials Electric Freeride said:
SUR RON POWER SYSTEMS for DIY and electric motorcycle companies 8)

"Sur-Ron has expanded their product line to electric motorcycle Power systems ( components ) used in Light Bee and other prototypes for buying as an individual product. Sur-Ron now offers a variety of power systems: Electric motors, FOC Electric controllers, and full power systems ( motor + controller )"

https://evnerds.com/electric-vehicles/e-motorcycle-news/sur-ron-power-systems-for-diy-and-electric-motorcycle-companies/

Are any of these plug and play with our bikes?

fechter · Apr 23, 2018

Sweet!
Not exactly plug and play, but with enough work...

The smaller ones might be the same as stock. Interesting they say the controller is FOC.

Rated Voltage 60 V
Operating Voltage Range 36 V ~ 100 V
Continuous Output Power (60 min) 16 kw
Peak Output Power (2 min) 28 kw
Speed Range 0~5000 RPM
Maximum Torque 129 N.m
Top Efficiency 92.4%
Gearbox Reduction Ratio 1：1.297

artisanstone · Apr 23, 2018

fechter said:
Sweet!
Not exactly plug and play, but with enough work...

The smaller ones might be the same as stock. Interesting they say the controller is FOC.

SUR-RON-C2-SERIES.jpg

Rated Voltage 60 V
Operating Voltage Range 36 V ~ 100 V
Continuous Output Power (60 min) 16 kw
Peak Output Power (2 min) 28 kw
Speed Range 0~5000 RPM
Maximum Torque 129 N.m
Top Efficiency 92.4%
Gearbox Reduction Ratio 1：1.297

Be cool if the medium one was plugnplay

3DTOPO · Apr 23, 2018

efMX Trials Electric Freeride said:
SUR RON POWER SYSTEMS for DIY and electric motorcycle companies 8)

Ooooo! Makes me want to build a carbon fiber tube based side-by-side OHV with the biggy! :twisted:

They need to sell battery packs too!

thoroughbred · Apr 23, 2018

I don't read chinese but I think they do offer the 60 volt battery and other light bee parts on the website.

How do these bikes track over trail trash and choppy offroad terrain? twitchy or stable?

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