Juddery Deceleration

[GazzyG]

As the title says, my H100 is juddery under deceleration.

When I got her, I changed spark plug and battery, so now she starts up and runs sweet as a nut. She'll pull well and she'll idle happily, once she's given a few mins to warm.

But here's the weird thing. Immediately after startup, whilst choke is on, if I come off the throttle, she'll decelerate nice and smoothly.... silky smooth.

But after she's warmed up some more and the choke is off, if I let go of the throttle, she gets a little juddery as she slows. If I keep a little bit of throttle on, but not enough to maintain speed, then this juddering goes away.

I'm no expert in these things - but does this sound like a fuelling issue? Cos as I said, choke on and she decelerates smoothly.

Ta

Gaz

[Guest]

My car does this in the lower gears. I'd be interested to see if its a similar problem!

[Colin the Bear]

The first part of the choke picks up the revs. Then it chokes the air off. Feathering the throttle is a good tactic, as is using a higher gear.

[GazzyG]

Feathering the throttle is a good tactic, as is using a higher gear.

 

Yup, I use both those tactics Col, ta But using a higher gear on a 100cc bike isn't always an option. Feathering the throttle is okay too, but doesn't help if you're braking pretty harshly (and yes, even with looking ahead and leaving a gap, this will sometimes happen haha! )

I'll have a monkey about with it, see what happens. Can always adjust things back to factory settings, as they're in the owners manual.

Ta guys.

[Colin the Bear]

Your brakes are much more effective than engine braking. When hard braking pull in the clutch. For gentle deceleration , roll off the throttle.

From what you've described, there may well be nothing wrong with your bike

[GazzyG]

From what you've described, there may well be nothing wrong with your bike

 

Well, the bike does weigh as much as an empty packet of cornflakes, so perhaps it's just exaggerating the jerkiness, with it not weighing anything?

I imagine on a 500 or w/e the sheer weight of the bike will stop you feeling any deceleration judders as much?

[Guest]

if your braking hard in a high gear the bike will stutter through the back wheel, basically theres not enough weight on the back and its in too high a gear... lower the gear to maximise soem of the engine braking along with the front brake.

one of the power rangers at devils does this on his fly-by, and then locks the rear, yep complete prat..

or is the symptom kangaroo juice,... moving but jerkily, when travelling at low speed..