Low rev vibration

Drivetrain upgrades, engine upgrades, or any other mods to gain speed or acceleration.

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mrdtrotter
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Low rev vibration

Post by mrdtrotter »

Hi group,

My PCX is now about 18 months old and done a little over 3000 miles, I have noticed recently that the bike has a very noticeable shudder when under low revs like on a hill start or creeping in traffic. If anyone has any idea where to star looking I'd be grateful for the advice.

Thanks

Karl
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Alibally
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Re: Low rev vibration

Post by Alibally »

It's probably the clutch that's glazed. Try a few full throttle starts and see if it's any better. It usually helps a bit.


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BPT7594
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Re: Low rev vibration

Post by BPT7594 »

Screen Shot 2016-07-01 at 11.14.05.png
Screen Shot 2016-07-01 at 11.14.05.png (624.45 KiB) Viewed 1846 times
It's a common problem.
It's either a front variator problem. Change your rollers to lower weight.
Or change your clutch, like me in the picture. Makes the clutch engage much more smoothly.
BPT7594
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Re: Low rev vibration

Post by BPT7594 »

Screen Shot 2016-07-01 at 11.19.20.png
Screen Shot 2016-07-01 at 11.19.20.png (748.76 KiB) Viewed 1845 times
Clutch bell mod to make the clutch catchier, smoother and cooler running, think of brake disks with holes in them ;)
Screen Shot 2016-07-01 at 11.19.42.png
Screen Shot 2016-07-01 at 11.19.42.png (740.73 KiB) Viewed 1845 times
Nice heh?
DeaninMilwaukee
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Re: Low rev vibration

Post by DeaninMilwaukee »

I agree about glazed clutch, mine does this periodically since I probably baby it from starts too often.

The solution is easy though, just hold the pcx still with the brakes and give it maybe 1/2 throttle for about 5 seconds. It will then be nice and smooth until the next time it glazes again.

No need to replace the clutch till it actually wears out.
tomtomclub2005
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Re: Low rev vibration

Post by tomtomclub2005 »

I had to deglaze often with very rainy climate over here- just put your front wheel against a wall, keep the bike perpendicular to wall and give it 2/3 full gas for 5 sec. Doing it with the brakes is tricky to open throttle enough.
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