front end wobble

  • bromz
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16 Jul 2013 23:40 #596864 by bromz
front end wobble was created by bromz
I had new tires put on last week and now under 40 mph I have a front end wobble? What do I do.It didn't have it when I dropped it off?

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  • Motor Head
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16 Jul 2013 23:57 - 16 Jul 2013 23:57 #596871 by Motor Head
Replied by Motor Head on topic front end wobble
Tire not balanced correctly? Maybe not seated on the bead straight? Axle properly fitted/ torqued?
Bad steering head bearings?
Did they do a fork service or anything else?

1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Last edit: 16 Jul 2013 23:57 by Motor Head.

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17 Jul 2013 00:09 #596875 by bromz
Replied by bromz on topic front end wobble
This is a pic of the seat on the rear tire could it cause a wobble in the front?
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17 Jul 2013 00:17 - 17 Jul 2013 00:23 #596876 by Motor Head
Replied by Motor Head on topic front end wobble
That bead is Not seated. Put your bike on center stand or another jack. Roll the tire and watch the tread do weird things. It will have a big Bow in it. Need to let the air out, spray some soapy water around the whole bead and re-air it.
Also the balance should be checked. I take it off, use the axle shaft in a vice, with a 2x4 cut to length to hold it level. Put the wheel on it, and spin it real slow, seeing where the heavy side is, it will go down to the bottom.

1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Last edit: 17 Jul 2013 00:23 by Motor Head.

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17 Jul 2013 00:22 - 17 Jul 2013 00:25 #596877 by 650ed
Replied by 650ed on topic front end wobble
That does not look seated to me. Tires normally have fine raised lines running parallel to the bead. When properly seated, these lines can be seen running parallel to the rim. See pic. One more reason I ALWAYS mount my own tires. Ed

Attachment 00000_2013-07-16-3.jpg not found


1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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Last edit: 17 Jul 2013 00:25 by 650ed.

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17 Jul 2013 10:27 #596910 by bromz
Replied by bromz on topic front end wobble
Got it. Tire wasnt seated. I deflated soaped put a rachet strap around it and put air in and pop. Rode to work and wobble was gone. thanks guys. Shame I paid the guy. 650ed where did you buy your tire changing tools? Harbor frieght?

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17 Jul 2013 10:46 #596916 by 650ed
Replied by 650ed on topic front end wobble
I've had them a very long time, so I don't remember where I got them. They are Motion-Pro 08-0005 11 inch irons (see pic). They are available at lots of places online; I think Motion-Pro's price is $10 for a set of 2. Having 3 is better, and MP does sell singles. Don't even waste your time with shorter irons! I used shorter ones for years and they are horrible - not enough leverage. Ed

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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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17 Jul 2013 17:00 #596975 by bromz
Replied by bromz on topic front end wobble
Do you have a tire rack or anything for breaking beads

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17 Jul 2013 17:45 - 17 Jul 2013 17:47 #596983 by 650ed
Replied by 650ed on topic front end wobble
No. Since I'm only removing a tire I plan to toss, I just use a couple C-clamps and a rubber mallet to break the bead. Usually, the mallet is enough. You do need to rest the tire/rim up on some 2x4's or something else that is sturdy when working the tires, because you need to raise the disk rotor(s) off the floor or you may damage them. Also, you need to put something between the tire irons and rim or you will mark up the rim. Any sort of plastic shield will do, you can even cut it from a plastic jug. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Last edit: 17 Jul 2013 17:47 by 650ed.
The following user(s) said Thank You: bromz

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22 Jul 2013 11:46 #597690 by GPz550D1
Replied by GPz550D1 on topic front end wobble

650ed wrote: I've had them a very long time, so I don't remember where I got them. They are Motion-Pro 08-0005 11 inch irons (see pic). They are available at lots of places online; I think Motion-Pro's price is $10 for a set of 2. Having 3 is better, and MP does sell singles. Don't even waste your time with shorter irons! I used shorter ones for years and they are horrible - not enough leverage. Ed

Attachment TireIrons11inch.jpg not found



Used these same tire irons last week to mount my new Bridgestone tires and they work very well. Am a believer in saving money and changing your own tires. Thay way you can be sure it is done right.

1981 KZ550-D1

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