Modern Vespa

Take a 1/8th wide elastic band, triple it and snap it into the slot between the throttle and end cap. It causes just enough resistance to overcome the return spring so the throttle stays where you put it. There is little difference in the effort required to twist the throttle.
On long trips especially, it relieves tension on your right hand quite nicely.

Sounds extremely dangerous.

Can you roll it off in an emergency?

Dude, that's a bad idea. Are you competing for a Darwin award?

When that moose wanders into your path is it easily turn-offable!

This has been done for years guys, most people will use an O-Ring. It's just putting a little resistance on the throttle. Just roll you hand forward and you are coasting.
Now, that said, you go over a bump and loose your grip on the throttle you are toast. This is why I have never been enticed into using this set up. And yes I have gone over a big enough bump that my hands have come off the handle bars before, it's a little scary at 60-70 MPH.

Wayne B

They sell the o-ring type just for this purpose. I do not use them but my husband does. I find that the throttle spring is pretty soft on the MP3 so no real need for it. I have had several BMW bikes and those things are killer. The Germans must have some pretty strong hands. My husband uses the o-ring type on a couple of BMWs.

Cheers,
Jill

+1

just when you want to release the throttle to slow down it probably won't.
REALLY BAD IDEA.
just spend a dollar and get a cramp buster they work great.

In actual use whether in city or countryside I twist the throttle to go slower or stop, I never "let go" and let the spring torque slow me down. This just allows me to maintain a fixed speed when needed, especially on long clear trips. In situations where a quick brake/stop is needed, I've found that twisting the throttle to zero happens so fast and natural that the mod is irrelevant.
Another reality for me is that city traffic here in Kitchener is pretty sedate. Like anyone else I'm constantly alert to what's near me and leaving lots of room at all times and even more so for the very occasional time I (have to) go on the 401 Expressway. "Crotch riders" are the worst for taking chances that I've seen whereas big Harleys and Hondas just cruise along sedately.
Our different riding environments, riding styles and amount of riding are also a factor in determining what issues each of us will probably encounter most.
For example, those who use their bikes to commute on a regular basis or are more aggressive drivers or encounter a lot of curvy roads in their area are certainly far more exposed to possible accident situations and especially so in heavy traffic.

I respectfully disagree. Regardless of riding conditions, a need for an emergency stop is always possible and rarely predictable. Having to manually roll the throttle back and then apply the brake is dangerous condition. When you need that emergency stop the only thing you have time for is hitting the brake. Any potential for the throttle staying open is bad news.

This is one mod that has real potential to hurt someone.

Kevin,

Don't mean to flog this thread, but in response to your concern of two actions required, I find that the action of my hand in suddenly squeezing the levers in an emergency (read "non-thinking") situation causes the throttle to immediately turn forward to zero at the same time. The torque resistance as I mentioned initially is extremely low.

Dennis

And that is what everyone should have beeen taught in rider training, but evidently weren't.

You must learn to roll off the throttle as you brake...it's an important safety issue. Having a strong return spring won't, by itself, do it for you.


Cheers

Trevor G

+1 on the roll-off and squeeze.

Dennis, consider what might happen if the bike went over on its side with the throttle unable to return to idle by itself. That back wheel would stay spinning under power until the engine was switched off. Not good if your leg is trapped beside it. A friend was caught in this position just last weekend.
https://modernvespa.com/forum/topic53562#737787

Or if you got hit from behind, your hand might open the trottle as it pulls off the grip. Your scoot could end up as an unguided missile....

IMHO this idea is giving inexperienced riders a way to do harm to themselves and others.
Not a good idea.

is this any worse than selling "foot pegs" on this forum, with the warning,,,"Not intended for full weight".

I have seen several items that I would never even consider on my ride, but to each his own, as they say.

I'll skip the band on my throttle thanks, but I won't scold the driver that tries it.

Remember when motorcycles had a hand clutch on the side of the bike? You would never consider it today.