Left Hand Throttle ?

[adrian_sm]

The way I have my bike set-up keeps my right hand a bit too busy. It does the throttle, front brakes, and rear shifter. While my left is doing nothing, except occasionally helping out with the rear brake. There is also the problem of clearance between the throttle and the rapid fire shifters. Making changing rear gears a mild contorsion act.

So..... I put my right hand half twist throttle on the left. Brilliant.

Felt really good for the test ride. Shifting gears was now unimpeded, easier to do hand signals when merging right across traffic while keeping the throttle wide open (I am in Australia, so we drive/ride on the left side of the road) But, twisting the throttle in the opposite direction is pretty uncomfortable for long rides.

So now I am looking for a left hand half twist throttle. Only place I have found them in stock is here: www.poweridestore.com. Anyone else options I should be aware of. Justin seems to be out of stock ebikes.ca

 

[PIM - Joey]

Hate to be self promoting on my first post, but...

http://us.itselectric.ca/category_s/56.htm

I'm assuming you wanted a Crystalyte throttle of sorts.

We should have them in

Left, Full, Half or Thumb varieties in stock.

Email ahead just to check, but we had plenty last time I was in the store.

 

[boostjuice]

If your current throttle is a hall effect type, then it is possible you may be able to modify it to rotate the correct way when on the LHS handlebar (What i have done with my "ORO" brand throttle as bundled with Cyclone motors). I pulled mine apart, flipped around the magnet inside to the opposite orientation together with the spring (required drilling a new small hole to capture the spring hook). If you've got some practical skills and are good with your hands then it may be worth a shot.

 

[adrian_sm]

If your current throttle is a hall effect type, then it is possible you may be able to modify it

Ah good thinking. I'll give it a go.

Joey,

Thanks for the link. If I butcher mine too much, I might just be ordering one.

Cheers.

 

[spinningmagnets]

Adrian, if you cut your throttle open...ES rules require that you to take and post pics of the patient during and after the surgery...

 

[adrian_sm]

Your wish is my command. Here we go....

Here is the before and after pics of my half twist right hand throttle, that came with my crystalyte kit.

Before:

After:


But I suppose you want a few more details...

 

[adrian_sm]

Well that wasn't too hard. I have now converted my right hand half twist throttle, into a left hand.

So what I did was pull it apart. Inside the handle there are four snap clips that hold the pivoting portion on the stationary. So once these were disengaged, you can pull the twisting handle off.
View attachment 5
View attachment 4

The hall sensor looked like it was glued in place in the main housing. The magnets were glued into little recesses in the handle side.
View attachment 3
A quick check with another magnet confirmed they both had the same pole facing towards the hall sensor, so I either had to flip the hall sensor over, or flip the magnets. The hall sensor looked pretty hard to dig out, so I opted for the magnets.

I marked the top edge of the magnet so I new which side was which, then a small blade broke the glues hold on. Pulled them out with a pair of needle nose pliers, flipped them over, and pushed them back in.
View attachment 2

 

[adrian_sm]

Next was to get the handle sprung in the opposite direction, so it was still a roll back of the wrist to accelerate, rather than a roll forward. I also wanted to lower the spring force if possible.

So I needed to reverse the hand on the spring. Simple, turn it inside-out, then bend the axial leg in the opposite direction. But the hardened spring wire material work hardened, yeilded and broke. So I just bent the remaining bit over instead. By some miricale, the position of the two legs on the spring located back into the original holes in the main housing and handle, and provided the return force I was looking for. I love it when luck is on your side for a change.

Here are the pics of the spring mod.

View attachment 2


Here we have the spring mounted ready for the twist grip half.


Put it all back together, tried it on the bike and hey presto it works. No throttle and full throttle voltages are still the same (0.82 & 3.85V). But I did notice the CA is saying that something is drawing about 10-30 mAmps at zero throttle, I can't remember if it did that before or not. Hmmmm. If I turn the controller off, or unplug the throttle it returns to zero current draw. Maybe the throttle LEDs are to blame. But 1W seems excessive for those piddly little LEDs.

Oh well.