- Joined
- Feb 15, 2013
- Messages
- 1,903
n2mb said:
depends on your desired torque, top speed and if you have steep climbs or mostly flat terrain.. probably the stock 48t, maybe even the smaller 42t that comes with the supermoto wheel set from luna..
Sur-Ron - New Mid drive Bike
- Thread starter Allex
- Start date
depends on your desired torque, top speed and if you have steep climbs or mostly flat terrain.. probably the stock 48t, maybe even the smaller 42t that comes with the supermoto wheel set from luna..
Rix
100 TW
n2mb said:
In addition to what EMX Trials (Natas) said, something I noticed with the 58T was it seemed that due to the mechanical advantage of the bigger sprocket the inductance load decrease was so much I couldn't draw max power except from launching from a dead stop. In other words, with the 58T, it launched very quickly, but then slowed on acceleration after about 15-20MPH. It would still pull up to about 35-36MPH, but slowly. With the 52T, it launches almost as quick, but pulls waayyy longer to about 30-32MPH before it starts s slowing on acceleration topping out at about 40MPH or so. Being that I don't have a CA hooked up, I don't know if this is the case for sure, but it feels that way. Being that I weigh around 245 ready to ride, I find this very impressive. As far as what is best for on road, use, the stock 48T with the 19" tires or a 42T with 17" tires will be your best bet, especially if you don't climb hills.
Has anybody actually measured the battery current on one of these things? I suspect the thing is running more than 3.6kW input. Way more.
i can see a good case for owning a range of drive ratios for both the super moto wheels and the offroad so you can set the bike up for a variety of conditions, maybe more important to some than others depending where you live.
but for me i got flatland one side and hills the other side so i need a few options.
one thing i noticed is the 58t drive actualy has about a 7kph higher top speed than the 48t on a flat dirt road but the range may be shorter for the 58t at those speeds than the 48t.
but for me i got flatland one side and hills the other side so i need a few options.
one thing i noticed is the 58t drive actualy has about a 7kph higher top speed than the 48t on a flat dirt road but the range may be shorter for the 58t at those speeds than the 48t.
im only guessing because i haven't tried a 52t with the 19inch wheels either but given that with the 48t the bike topped out at 70kph on the flat for a good run and did maintain 77kph under the same contitions on the 58t i would say its possible the 48t is slightly geared below the peak for the motors kv and the controlers volt and amp output. what i think is the 58t is slightly above that peak.
52 might be the sweatspot for flatland runs at top speed for the stock controller.
anyone who knows for sure is welcome to bust my theory.
52 might be the sweatspot for flatland runs at top speed for the stock controller.
anyone who knows for sure is welcome to bust my theory.
How are you measuring your speed? GPS or off the stock speedo on the bars.snee said:
I believe the controller is driving the bar mounted speedo and has no idea of gearing. It's calibrated for stock setup
Suspect what you are seeing is the motor being able to spin faster with the lower gearing producing a higher top speed reading.
I've just gone from stock gearing to the big-boy sprocket and top speed is definatly down a bit but way more fun with the extra torque off-road.
Rix
100 TW
snee said:
This is what I think is going on, it feels like it anyway.
Rix
100 TW
madin88 said:
You are correct.
WHat I think Snee meant was indicated top speed increased. When I went to the 58 from the 48, my indicated top speed on the handlebar mounted speedo increased from 70Km/H to 77km/H. The speed is obviously measured at the motor and not the wheels and the mechanical advantage of the larger sprocket allowed the motor to spin faster. However, the police radar trailer confirmed my speed to be 43MPH with the 48T and 37MPH with the 58T. Yesterday, I hit 40 MPH with the 52T sprocket on the rear and I see 74/km/H on the handle bar speedo which means the indicated measured speed is not as far off with the 52T as it was with the 58T mounted.
Rix
100 TW
motomoto said:
Being that you are much lighter than I am, I suspect if you try your 52T, you definitely won't go back to a 58T.
A bicycle speedometer would work.
Allex
100 MW
3DTOPO said:
Check this one out:
http://www.chainreactioncycles.com/se/en/dvo-suspension-emerald-dh-fork-2017/rp-prod124427
my boxer world cup arrived today, it has a 20mm maxle with 6mm hex both sides and the stock wheel is a perfect fit. it came with two top crown options one standard and a higher lift crown both are direct mount compatible for the bars. also got a full set of seals and O rings plus a shock pump in the box.
if the weather is good this comming weekend ill be out to test that.
if the weather is good this comming weekend ill be out to test that.
Allex
100 MW
fechter said:
Did it today, my clamp meter says ~20A in EP and ~65A in Sport.
Can some1 comfirm this?
This gives us north of 3kW in peak.
Allex
100 MW
I guess it was just assumptions, this is actually even better because of my hill climbing test, but I still want a second measurement.
motomoto
1 kW
- Joined
- Jun 28, 2010
- Messages
- 458
The true measure of what the system puts out is the measured rear wheel hp. We put the test bike on the
Zero motorcycle dyno and this is what it measured. The production bike has 20% more torque than the test
bike according to the factory.
This is the test bike dyno reading.
Zero motorcycle dyno and this is what it measured. The production bike has 20% more torque than the test
bike according to the factory.
This is the test bike dyno reading.
liveforphysics
100 TW
Glad you got it in a dyno motomoto!
The big spike at the beginning of the plot is dyno rpm sensor induced artifact. (i know that dyno well)
The big spike at the beginning of the plot is dyno rpm sensor induced artifact. (i know that dyno well)
maydaverave
10 kW
- Joined
- Jan 13, 2009
- Messages
- 542
That is the flattest squarest Dyno run I have seen. God bless electric.
