So what's really going on here?? - Wrist Twisters
 
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post #1 of 27 Old 05-11-2011, 09:46 PM Thread Starter
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So what's really going on here??

Hey guys. So I just got a new front tire (PR2) from Cycle Gear, who mounted and supposedly balanced said tire. In the process of changing out the tire, I went a head and raised the forks about 5mm and then made sure I torqued everything down properly and in the right sequence. I lubed the front axle and gave the bearings a little push of grease while they were in the open. Problem is, I start to get a little head shake around 110-120 mph going in a straight line. I don't ride that fast often, but I don't want this problem manifesting itself at lower speeds. My first guess would be improperly balanced tire, second would be forks... Anything else I should check or did I just so happen to mess something up?

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post #2 of 27 Old 05-11-2011, 10:35 PM
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im gonna bet imbalanced tire. When i got my 919 i would get a weird head shake when i let go of the bars at like 30, small but it was there... continued to stay there through the original set of tires... next set i took all the weights off the rims before gettin tires mounted n balanced and havnt had a problem since.

The stock clamp on weights in the center of the tire are less than adaqute as you cant balance from side to side... stick on weights are the way to go.

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post #3 of 27 Old 05-11-2011, 11:56 PM
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post #4 of 27 Old 05-12-2011, 02:08 AM
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Quote:
Originally Posted by The Shadow View Post
Dynabeads
+1

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post #5 of 27 Old 05-12-2011, 06:52 AM
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Quote:
Originally Posted by The Shadow View Post
Dynabeads
I just put DynaBeads in the tires on the F250, oversized tires with rim saver sidewalls kept tossing my wheel weights off on the freeway. The DynaBeads do a remarkable job on the 33" all terrain tires, I'm going to use them on the 9er at the next tire change.


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post #6 of 27 Old 05-12-2011, 09:10 AM
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I put Dynabeads in the 9er on the last change and they're awesome!

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post #7 of 27 Old 05-12-2011, 12:20 PM
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Dynabeads all the way!! And you can do it yourself!!!

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post #8 of 27 Old 05-12-2011, 02:52 PM
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How do you know how much (oz) to use of the dynabeads?

I have two 5oz bags just waiting....

I was going to put 1 - 1.5 in the front, and 3oz in the rear. I'm assuming you can't overfill, as any remaining amount will just float around and re-balance, correct?

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post #9 of 27 Old 05-12-2011, 03:05 PM
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http://www.innovativebalancing.com/c...otorcycleChart
Motorcycles
Motorcycle applications are easy for all bikes, 2 wheel or 3 wheel

Front
80 - 120 mm tire width 1 oz
80 - 120 mm tire width (BMW Telelever only) 2 oz
130 mm tire width 2 oz
Rear
130 mm - 240 mm width 2 oz
250 mm - 360mm tire width 3 oz
195 - 205 car tires on the rear 3 oz
Scooters
10" diameter wheels (scooters) 1 oz
12" & Up diameter wheels (scooters) 2 oz
Dual Purpose / Off Road with Rim Locks
Front - 80 - 120 mm tire width 2 oz
Rear - 130 -230 mm width 3 oz


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post #10 of 27 Old 05-12-2011, 03:29 PM
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Quote:
Originally Posted by voodooridr View Post
Tire Balancing Charts for Light Truck, Commercial and Motorcycles
Motorcycles
Motorcycle applications are easy for all bikes, 2 wheel or 3 wheel

Front
80 - 120 mm tire width 1 oz
80 - 120 mm tire width (BMW Telelever only) 2 oz
130 mm tire width 2 oz
Rear
130 mm - 240 mm width 2 oz
250 mm - 360mm tire width 3 oz
195 - 205 car tires on the rear 3 oz
Scooters
10" diameter wheels (scooters) 1 oz
12" & Up diameter wheels (scooters) 2 oz
Dual Purpose / Off Road with Rim Locks
Front - 80 - 120 mm tire width 2 oz
Rear - 130 -230 mm width 3 oz
THANKS! So 1oz up front and 2oz in the rear.

2009 Aprilia Tuono - Ginger
2001 XR650R BRP (Big Red Pig)
2006 Honda 599 - Ex wrecked it :-D
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2006 Honda VTX 1300C (sold)
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post #11 of 27 Old 05-12-2011, 03:43 PM
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Should do the trick


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post #12 of 27 Old 05-12-2011, 08:54 PM Thread Starter
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After further pondering, I'm going to have to say improperly placed balancing weight. It's stuck about 3/4 of an inch from the edge of the rim. At 'certain speeds' I can see that as an issue. At innovative balancing's website now. Do the filtered valvestems work on the stock 9er rim?

BTW, I asked my coworker (both of us are heavy truck mechs) if he ever heard of anyone using dyna beads before. He was confused and disturbed, thinking I was asking about a very different kind of bead...

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post #13 of 27 Old 05-13-2011, 03:13 PM
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The filtered cores will not work on the stock stems, or the alum angled ones I bought to replace the stockers. You really don't (shouldn't) need them, just make sure the stems are somewhat upright when you check/add psi.

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post #14 of 27 Old 05-15-2011, 10:15 AM Thread Starter
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So I ordered up a Dyna Bead kit with the applicator and 4oz of beads.

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post #15 of 27 Old 05-15-2011, 01:31 PM
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This is the first I've heard of Dynabeads.


I did go to the website, and looked at the "how it works" page.
Guess I'll just have to trust it does, as I still don't understand how it does.
Can't grasp how the stuff knows where to go, where the light spot is, or why it would automatically gravitate to the light spot.

It is really as simple as not having the wheel balanced, and pouring these in?

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post #16 of 27 Old 05-15-2011, 01:51 PM
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Quote:
Originally Posted by Monkeywrench View Post
This is the first I've heard of Dynabeads.


I did go to the website, and looked at the "how it works" page.
Guess I'll just have to trust it does, as I still don't understand how it does.
Can't grasp how the stuff knows where to go, where the light spot is, or why it would automatically gravitate to the light spot.

It is really as simple as not having the wheel balanced, and pouring these in?
Yup, that easy. Once my tire wears out I cut a whole in the old rubber, dump the beads out.(they are very small)

Spoiler:

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post #17 of 27 Old 05-15-2011, 01:53 PM
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i put dyna beads in a cust. tire then spun it on the spin balancer. never came out balanced. always needed weight ina different spot. now i know that i could not possible spin it long enough to make them balance out but figured i would do it seee what it would do.

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post #18 of 27 Old 05-15-2011, 02:17 PM
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Quote:
Originally Posted by 3dcycle View Post
i put dyna beads in a cust. tire then spun it on the spin balancer. never came out balanced. always needed weight ina different spot. now i know that i could not possible spin it long enough to make them balance out but figured i would do it seee what it would do.

Their site says it happens in "seconds" with no transitional vibration.

How long does the spin balancer spin it?

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post #19 of 27 Old 05-15-2011, 04:11 PM
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Quote:
Originally Posted by 3dcycle View Post
i put dyna beads in a cust. tire then spun it on the spin balancer. never came out balanced. always needed weight ina different spot. now i know that i could not possible spin it long enough to make them balance out but figured i would do it seee what it would do.
I had a shop do the same thing to my front when I first got my beads. I don't think the machine spins it fast enough to make the beads spread out properly.

Spoiler:

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post #20 of 27 Old 05-15-2011, 04:43 PM Thread Starter
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I gathered from the website that it was the vibrating/bouncing from the unbalanced tires that caused the beads to shift where they need to. A balancing machine doesn't bounce or vibrate enough.

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post #21 of 27 Old 05-15-2011, 04:46 PM
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Al I know is I put them in te rear tire, new 919, it had a little over 2oz of weight on the center of the rim, rode it with the weight still on then took the weight off and there was NO difference. If the Dyna Beads didn't work I'm thinkin' I would have felt something after removing the weight.

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post #22 of 27 Old 05-15-2011, 04:48 PM
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i would think the beads would spread out pretty quick... and those tire machines spin pretty damn quick.

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post #23 of 27 Old 05-15-2011, 04:49 PM Thread Starter
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Quote:
Originally Posted by rmb View Post
rode it with the weight still on then took the weight off and there was NO difference.
Verified by a real world test right there.

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post #24 of 27 Old 05-15-2011, 05:05 PM
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I'm totally sold. I talked two of my buds into trying them and they too are sold, no issues whatsoever, they have BMW's, no problems at all.

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post #25 of 27 Old 05-16-2011, 08:51 AM
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Quote:
Originally Posted by 3dcycle View Post
i put dyna beads in a cust. tire then spun it on the spin balancer. never came out balanced. always needed weight ina different spot. now i know that i could not possible spin it long enough to make them balance out but figured i would do it seee what it would do.
Wait a minute! You're saying you put it on a spin balancer but then you say you couldn't spin it long enough? So you were spinning it and not a machine? That's never going to work! Were you checking for balance when the wheel stopped? All the beads fall to the bottom when you do that. The tire has to be spinning at a fairly decent speed and the balance checked while it's spinning.

I've been using these Dyna Beads for several years now and have even swapped them from old tire to new tire and they are fantastic.

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post #26 of 27 Old 05-19-2011, 06:40 PM Thread Starter
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So here's an update: Dyna Beads work. Put 'em in after work today, aired up the tires, took off the weights and away I went. I tucked down and went WFO until she had no more... The only wobble I got was at ~140 MPH (indicated) and it could've been from the wind grabbing at my jacket. Awesome deal as far as I'm concerned.

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post #27 of 27 Old 05-19-2011, 07:03 PM
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^^ Sweet!

Well, fire the engines! Spur this iron space-pony on!

"The Shadow"
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