Stark Varg Electronic Clutch

Has anyone seen/tested this? Not sure if this is an actual product.


Youtube video:

It is nice to see the aftermarket solution that so many people have been wanting. I prefer the rear brake but some riding buddies have remarked they would prefer the foot brake and a clutch.

Interesting teaser video, I'd like to see some footage on some tight single track, some hard enduro stuff, and on an mx track. And some information on how it works. Looks like it has some programmability built in too, would be good to see more information on that too.

F451 said:

Interesting teaser video, I'd like to see some footage on some tight single track, some hard enduro stuff, and on an mx track. And some information on how it works. Looks like it has some programmability built in too, would be good to see more information on that too.

Click to expand...

This might help for some situations, but it has at least 2 major limitations.
1. In a low HP map it cannot be used to help loft the front.
2. It cannot be used to eliminate engine braking.
(and there might be more)

fsfs said:

This might help for some situations, but it has at least 2 major limitations.
1. In a low HP map it cannot be used to help loft the front.
2. It cannot be used to eliminate engine braking.
(and there might be more)

Click to expand...

1. This should be easy to achieve by programing of the controller. If the throttle is opened while the clutch is pulled in then a torque multiplier could be applied to the current controller torque limits. This would be short term but allow the bike to behave as if it was building rotating inertia.
2. Engine braking could also be set to be reduced in a linear fashion depending on how much clutch is being pulled.

I was always curious as to why an electronic clutch wasn't standard on the Stark Varg since its inception. It is almost necessary for hard enduro riding. It helps prevent whiskey throttle when fatigued.

MountainMadnes said:

1. This should be easy to achieve by programing of the controller. If the throttle is opened while the clutch is pulled in then a torque multiplier could be applied to the current controller torque limits. This would be short term but allow the bike to behave as if it was building rotating inertia.

Click to expand...

Good idea... Yes, there may be a solution out there. This is a piggyback controller though, so it cannot tell the metor to change its max torque. But... it should be possible to set the power to 80hp and then limit it with the piggyback to whatever is comfortable for riding. Then, the piggyback could be programmed so that dumping the clutch unleashes the max power temporarily.

MountainMadnes said:

2. Engine braking could also be set to be reduced in a linear fashion depending on how much clutch is being pulled.

Click to expand...

Same with pulling the clutch. It could partially open the throttle to cancel out the engine braking / regen.

Philip said:

Good idea... Yes, there may be a solution out there. This is a piggyback controller though, so it cannot tell the metor to change its max torque. But... it should be possible to set the power to 80hp and then limit it with the piggyback to whatever is comfortable for riding. Then, the piggyback could be programmed so that dumping the clutch unleashes the max power temporarily.

Click to expand...

Well I would imagine you don't need max torque to lift the front end. Having not ridden a Stark Varg, I don't know how easy it is to pop the front end at different power settings. However on a gas bike it can be achieved with very low power just of idle. The clutch controller could perform this action depending on how it is wired. I am not sure weather the throttle is an analog outputs like a voltage, or current. Or if it is a digital signal. Is this clutch lever just connected in series with the throttle?
The clutch looks like it can be controlled with an app so while the max power settings and curve within the bike aren't changed the throttle application over time could be. It would be very cool to be able to hold the throttle wide open and bleed power and traction for short sharp climbs and steps. I have been thinking about this since the Stark Varg was released.