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vpd66 05-14-2019 10:10 AM

Better quality Mini Bike twist throttle
I have a Monster Moto MM-B212 mini bike and I'm not happy with the twist throttle. It has an 1/8 of a turn or a little more slack in it and makes it very annoying to ride. When I take off I have my hand high on top of the bars then I can get full throttle. When I'm trail riding my hand gets in a more relaxed position and when I get to a field or opening and want full throttle its hard to get it without repositioning my hand. I've tried every adjustment I can think of (pull the cable tighter, adjusting the cable housing to make it longer, and etc.) and it just seem to be in the twist grip itself. I know the cable is taunt and the slack is not in the cable. Is there a better twist grip available? Anyone else have this problem? I'm also thinking about going to a thumb throttle. Any hints or tips?

itsid 05-14-2019 08:31 PM

twist throttles are plenty...
you can find one on nearly every single motorbike.

And frankly all work the same,
if you have too much slack there are likely two main reasons:
1) throttle cable too long and/or has too much slack itself (maybe even play in cable vs wire)
easy to fix and the first thing you should take care of
the shortest viable throttle cable is the correct length ;)

2) sticky throttle (happens to many motorcyclists one day or another).
remove the twist throttle clean handle bar and inside of plastic tube really well,
apply some light grease or dry lube.. reinstall..

If none of the above works for you
you might need to refit a new internal reset spring.
some use a simple tensioning spring wrapped around the handle, it wears over time
some have a more sophisticcated torsion spring which is harder to replace
(since finding a matching one is more difficult)

And if that still doesn't make you happy,
just buy a new one.
I'd refrain from buying a cheap chinese one..
but finding one from a major mfg of mopeds
(Honda, Piaggio or alike)
Moped twist throttles are usually nothing but the throttle
(no light switches, no starter button no mirror arm thread)
and they work well.
I mean sure you might get lucky with a chinese one.. but that's what you have now as well.. soooo *shrugs*

If you're unhappy with the amount of travel of the throttle itself,
then you might want to consider
a) shortening the lever ont he throttleplate of the engine
b) use a quick twist throttle (the internal reduction reduces the travel)


PS frankly: throttle cable is most likely too long..

950speed 05-14-2019 09:19 PM

So what if you changed where the cable connects to the engine.
As in the attachment point is closer to the pivot point of the throttle arm.
Let’s see some pictures and then I can draw some arrows showing that I mean. Because the inside of the arm moves a shorter distance than the outside, exact how tires on a kart and car work. And the reason for why a differential is needed.

Now the only draw back would be a slightly amount of force required, but let’s see some throttle arm pictures from the engine!!

itsid 05-15-2019 05:36 AM

that's what I meant with
"a) shortening the lever on the throttleplate of the engine"


950speed 05-15-2019 05:49 PM


txluke 06-21-2019 11:27 PM

You could always go to a thumb throttle.

madprofessor 09-12-2019 06:20 PM

Only 2 rules to know on a throttle cable: (1): Sleeved sheath. (2): Heavy return spring on motor.
That's it. You pay extra for a quality cable that has internal metal sleeving in the sheath so the steel cable slides back and forth inside of that freely even with a semi-tight bend in the positioning. The return spring(s) on the motor at the point of cable connection should be easily more than strong enough to forcibly yank that cable back when you let go of the throttle. Otherwise you end up sitting on your splitbiscuit while the bike thunders away at 40mph without a rider thanks to the law of angular motion. Shove the end of the sheath all the way into the twist grip while pulling on the cable, then lock the sheath's other end down to the motor, and pull the cable to its lockdown screw. If the spring has retracted the throttle mechanism to the idle position, you've got it, lock the cable down.

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