Author Topic: Head Shake  (Read 826 times)

DryFly

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Head Shake
« on: August 14, 2019, 01:19:03 AM »
I have a (new to me) 2007 People 250 with just under 19,300k. The scoot is in good shape and has been well taken care of from what I could tell, plus the PO is local and I know where he lives :)
I've only owned and ridden motor cycles in the past, so this scooter thing is new to me.
Anyway, I went out for a ride this afternoon, the first decent long ride since buying, out in the country on twisty and hilly roads. As I was decelerating while going down a small hill to a stop, the bars started doing a head shake! I've never experienced this in 50 years of riding. It wasn't a frightening or violent thing, not like a Nicky Hayden thing, but it definitely let me know it was there. I kept on riding and it would happen occasionally, again as I was decelerating at least as best I could tell.
The roads were flat and well paved, minor, speeds were generally between 35-45 mph, very little wind.
I know this scooter has a tendency to lean in at really low speeds in tight turns. Is this related? Is this head shake behavior typical for this scoot, or is there something loose maybe in the front end somewhere?
Thanks for looking

CROSSBOLT

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Re: Head Shake
« Reply #1 on: August 14, 2019, 01:46:44 AM »
Front tire? Really don't know. Head bearings snug?
Karl

Three motorcycles 1960-1977 (restored a 1955 BSA)
Agility 50
Yager 200i
Downtown 300i
Navy tech, Ships Engineer, pilot and aircraft mechanic

mousejunks

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Re: Head Shake
« Reply #2 on: August 14, 2019, 03:16:53 AM »
When riding on a smooth flat downhill road, let go of the handlebars slightly. If it wobbles or shakes then it is possibly caused by an uneven front tyre, bent front forks or loose steering bolts. I suggest at least changing the front tyre based on that mileage.

The speed wobble on my Downtown 300i disappeared when I replaced my very old Michelin Pilots with new Pirelli Diablos.
'09 Kymco Espresso 150i
'11 Kymco Downtown 300i ABS - 79,500km
'17 Kymco Downtown 350i ABS

LidoCA

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Re: Head Shake
« Reply #3 on: August 14, 2019, 03:49:08 AM »
 There used to be a guy on this forum that was a Kymco mechanic in Oregon. His screen name escapes me at the moment. He mentioned that the People 250 and 250S both had issues with this. I believe that it was mostly when he would try to go hands free. Do a search on the subject. I do not remember the details.
Steve
I have ridden well over 17 miles on my scooters.

2013 LIKE 200i LX.
2016 Yamaha SMax
2014 Yamaha Majesty
La Mirada, Ca.

john grinsel

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Re: Head Shake
« Reply #4 on: August 14, 2019, 10:55:41 AM »
First, leave hands on bars!   Scooters just do not handle as well as a good motorcycle---I would first look to rear of scooter----is there top box? Loads placed above and behind rear axle center are like tying a rock to the rear of an arrow.…..steering head bearing set up and of course fresh tires make scooter handle well.

CROSSBOLT

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Re: Head Shake
« Reply #5 on: August 14, 2019, 12:55:22 PM »
First, leave hands on bars!   Scooters just do not handle as well as a good motorcycle---I would first look to rear of scooter----is there top box? Loads placed above and behind rear axle center are like tying a rock to the rear of an arrow.…..steering head bearing set up and of course fresh tires make scooter handle well.
I think John is on to something here! It is kinda like Doc Campbell said: "Well, just stop doin' that!" The Kymco scoots we have had all did that when you would take your hands off the bars. Never felt ANY tendency  while even just one hand on the bar.
Karl

Three motorcycles 1960-1977 (restored a 1955 BSA)
Agility 50
Yager 200i
Downtown 300i
Navy tech, Ships Engineer, pilot and aircraft mechanic

DryFly

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Re: Head Shake
« Reply #6 on: August 14, 2019, 03:35:17 PM »
Thanks for the replys :) I've done more research and I agree that it is probably a geometry thing with the scooter - seems to be fairly common. When I first got the scooter the rear shocks were set on the "stiffest" setting, i.e. more of the riders weight was sent forward. Soon after I got it changed the setting to the mid-range and I was thinking of lowering it all the way to the final setting. I may play with that a little just to see if by changing the shock settings around I can make it worse or better.
This winter I'll probably try to check the head bearing just for grins

Viper254

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Re: Head Shake
« Reply #7 on: August 14, 2019, 07:42:29 PM »
I've never had a scooter that didn't flutter at the front a bit!
Rides;

Suzuki GW250 Inazuma (2016)
Honda C70C (red, 1983)

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