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Discussion Starter · #1 ·
I'm getting a bouncing feeling around 30mph while not heavy on the throttle. It's almost like my front tire is out of balance.

Anyone else experience this?
 

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Mine rides great regardless.
 
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I got it ... all gears, all speeds. At wot it goes in and out, like 3 seconds wobble, 3 seconds smooth like buttah and just repeats
 

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I've found on mine it depends on the road. It does it in the exact same spots every time.
 
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Discussion Starter · #7 ·
Thx for the feedback. Mine seems to go away when I get on the throttle. I'm getting my valves adjusted on Friday. I'll have them look at it then. It's not a show stopper just very noticable occassionally. My gf has a metro and she doesn't experience it. My dealer said he's heard of that on smaller bikes and not to worry. So it's probably nothing.
 

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mine has a warble as well. eyeing the front tire, it is slightly out of round. i need to investigate it further.
 

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mine has a warble as well. eyeing the front tire, it is slightly out of round. i need to investigate it further.
Mine is same slight head shake but thinking its most likely from the crapy v-rubber tires these things come with, 12in wheels, and in my case the craptastic New Jersey roads
 

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mine has a warble as well. eyeing the front tire, it is slightly out of round. i need to investigate it further.
Stock tire?
How many miles?
Notice at specific speeds?
Always from day one or recent?

Can possibly lift front and check with dial indicator.
Can possibly check out of balance by lifting front and checking gravity rotation.

Conditions, potholes, curb jumps, skidding stoppies?
 

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Discussion Starter · #13 ·
I can look over the front and see the wobble even on smooth surface. My guess is that it is the tire. I like idea about using a caliper. Why didnt dealer think of that? Grrrr..
 

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Its a combination of less than stellar road surface and way too soft suspension. Any imbalance from the tire exacerbates this condition.
 

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Stock tire? yes
How many miles? currently 179, did it since new, 2 days ago.
Notice at specific speeds? 30+mph
Always from day one or recent? day one, first time i rode it

Can possibly lift front and check with dial indicator. you can visually see the warble from the tire
Can possibly check out of balance by lifting front and checking gravity rotation. did this numerous times, brake disc is dragging slightly and it must not be out of balance too bad, as it ends up in a different spot every time

Conditions, potholes, curb jumps, skidding stoppies? YES. :)

it needs a tire, i will get it done eventually i guess. no rush, as i am over the Grom and it will be relugated to the back of the garage now... :smile:
 

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Stock tire? yes
How many miles? currently 179, did it since new, 2 days ago.
Notice at specific speeds? 30+mph
Always from day one or recent? day one, first time i rode it

Can possibly lift front and check with dial indicator. you can visually see the warble from the tire
Can possibly check out of balance by lifting front and checking gravity rotation. did this numerous times, brake disc is dragging slightly and it must not be out of balance too bad, as it ends up in a different spot every time

Conditions, potholes, curb jumps, skidding stoppies? YES. :)

it needs a tire, i will get it done eventually i guess. no rush, as i am over the Grom and it will be relugated to the back of the garage now... :smile:
sounds not too bad, suspension light so very noticeable

press the pads back when you check if you can so it doesn't drag.
should be able to hold tire in different places from stopped position and it will roll with heavy point to bottom, not sure spinning will show accurately. Slow and easy, use levels or what you can to ensure good results, lasers, etc., anything available, a popsicle stick mounted to a right angle stand, plumb bob from the ceiling, even a string from a point above to below.

might try breaking the bead, letting out air and rotating the tire for a better balance
a manual tire stand works well. check tire and rim to rule out warpage.

check balance of rim without tire if you're into it that far.

Optional remount of tire with reverse rotation after five hundred more miles, or whenever you want to experiment for better results.

low quality run of the mill tire, eventually just plan for a better tire next time

do more stoppies and keep working it, maybe it won't change

change fork oil to 8w from 5w. maybe to 10w to stiffen stock forks.

note self weight, plus 200, less, more, keep in mind for adjustments, good luck!
 

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Guess I've been lucky. No bounce no wobble.


Sent from my iPhone using HondaGrom.net
 

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You don't really need a dial indicator to check runout. If it's so slight that you can't see it with the unaided eye, it's too slight to cause wheel shake. Raise the wheel so that it can be spun freely and an easily improvised "runout gauge" can be used. All you need is a stationary reference point to see lateral, or radial, runout of 1mm, or more.

Could be the tires. If it is, however, they'll eventually be "force ground" just from riding. That said, it might also be the rim...and the tire will still eventually wear into a more concentric rolling pattern. If that's what you have, then you're in for a rude awakening when it's time to replace the front tire (and the warranty period has long-since expired). Any competent dealership, that's selling something other than financing, should have tire/wheel runout checked within a few minutes. And, either eliminated as the problem...or corrected.

A couple ounces of Dynabeads will plush-out the ride, at speed, unless the tire and/or wheel are really fupped duck. Don't overlook chain tension. Excessive slack can produce enough chain whip, above 50mph, to cause an annoyingly heavy shake at higher speeds.
 
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