Throttle resistance

[JohnnyD]

I have a recent model (not sure of year) E-motion Street. I have found the PAS doesn't work well for me because I have a weak right leg which messes with the assist. I switched to using the half grip throttle. It is still really jumpy on a full charge but evens out as the battery drains a bit. Still better than the PAS. Anyway, my wrist begins to ache from holding the throttle after a while. I added a wire tie to the grip to use it as a thumb throttle, but now my thumb is cramping. I think the problem is with the spring resistance in the throttle. I'd like to make it super easy to twist so it takes very little pressure to keep it steady. Are there differences in the spring tension (I assume there is a spring involved??) between different throttle brands? Is there a way to modify the one I have to twist more easily?
Thanks!

 

[RunForTheHills]

I am not familiar with that bike. Most throttles use hall effect sensors, but not all of them. There are usually three pins (ground, +5V, and signal), but sometimes the throttle has other functions such as a battery level display or a cutoff switch and there are more pins on the connector. Even if there are only three pins, the pinout order can vary, so you may have to do some soldering if it is wrong.

There also might be a way to program the PAS sensitivity to work better for you. Check with the manufacturer.

I bought a couple of these. They offer different pinouts on the connector. The spring is very light and the throttle is low profile. However, they are pricey for a throttle and they ship from Eastern Europe, so it takes a while to get it.

https://e-bikestuff.com/en/12-throttles

I also have this one. The spring is a little stronger on it.

https://www.amazon.com/gp/product/B08T6Q82TV/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[Lindalou]

I have a recent model (not sure of year) E-motion Street. I have found the PAS doesn't work well for me because I have a weak right leg which messes with the assist. I switched to using the half grip throttle. It is still really jumpy on a full charge but evens out as the battery drains a bit. Still better than the PAS. Anyway, my wrist begins to ache from holding the throttle after a while. I added a wire tie to the grip to use it as a thumb throttle, but now my thumb is cramping. I think the problem is with the spring resistance in the throttle. I'd like to make it super easy to twist so it takes very little pressure to keep it steady. Are there differences in the spring tension (I assume there is a spring involved??) between different throttle brands? Is there a way to modify the one I have to twist more easily?
Thanks!

If your hand is getting sore by twisting the throttle, there are several types of "throttle holders" on the market. Check on amazon.

 

[theemartymac]

There are also a range of throttle aids in the motorcycle world sometimes generically called Crampbusters. They slip on and allow you to use your palm weight to maintain the pressure. A poor mans cruise control, but also increases leverage, reducing the perceived spring tension.

https://fortnine.ca/en/crampbuster-cruise-assist?pk_cid=12810931413&pk_campaign=pla-1627835979552&pk_source=google&pk_medium=paid&pk_content=121671145896&gclid=CjwKCAjw2P-KBhByEiwADBYWCrKsoayksQDthzz3TcHPo1hECe0bGGxtdXKnIP73l3bXZrk1v2xR4RoCnFwQAvD_BwE#76=21&493=19125

 

[PedalUma]

Two ideas: Assuming you have a half-twist, half-grip throttle, there are a pair of nylon rings between the throttle and the grip. This prevents it from binding against the rubber grip. If removed the throttle would be harder to move in both direction but would more easily stay in any position. Throttles tend to have about five winds on their springs. If you took it apart you could take the five down to four, decreasing its return tension by 20%.

 

[6zfshdb]

I use this device which was primarily designed for motorcycles:

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It clamps around the throttle, either half or full grip, and rests against the brake lever. It's convenient and holds the throttle at any speed you choose.

 

[AHicks]

Something that might act like a "cruise control" sounds scary from where I'm sitting. With the idea that it's going to be fully canceled when/if I hit the brakes makes it seem a little better, but it's going to "resume" as soon as you let go of the brake.....

Here, I think my focus would be on converting it to some type of thumb control. They require very little pressure and speaking for myself, seem much more wrist friendly. That's me though.... -Al

 

[6zfshdb]

Something that might act like a "cruise control" sounds scary from where I'm sitting. With the idea that it's going to be fully canceled when/if I hit the brakes makes it seem a little better, but it's going to "resume" as soon as you let go of the brake.....

Here, I think my focus would be on converting it to some type of thumb control. They require very little pressure and speaking for myself, seem much more wrist friendly. That's me though.... -Al

The advantage of the "New Go Cruise" mentioned above is it uses the brake lever to hold the throttle position. When you pull in on the lever to brake, it twists the throttle, effectively shutting it off. It has to be installed correctly to work though.