Front tire problems
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Thread: Front tire problems

  1. #1
    Baby Twin
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    Oct 2013
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    Front tire problems

    Hi everyone. I recently replaced both of the tires on my TLS because I had a screw stuck in the back one and they were both worn down enough that I didn't feel like I was losing a lot of money over it, plus I ride two up a lot and I did not want to have a passenger and be relying on a tire plug. The old tires were a michelin power pilot for the front and a dunlop sportmax Q2 for the back. I replaced the front with another power pilot because I found one on sale and I replaced the back with a shinko 009 raven which has pleased me on past bikes. Yes, I mix tires Anyways I have put about 350 miles on the new tires and so far I have been pleased with the break in and ride. They are grippy and I have had no problems making nice turns in the twisties. However on two occasions I have gotten my bike up to about 100-105 mph and the front tire begins acting very squirrley, oscillating back and forth and causing the bike to wobble. I have always had a steering dampener and it has always been set pretty tight. With my old tires my bike was able to go 155-160 on a few occasions with no problems (other than me being scared shitless). Does anyone have any suggestions as to why my new tires are giving me speed wobble? I understand it could be because I mixed tire brands but I doubt that is the case. Do I need to use them more before getting my bike up into the triple digits? Is it possible a weight has fallen off and the tire is off balance? Any help would be greatly appreciated.

  2. #2
    MotoGP Pit Boss The Ring-In's Avatar
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    check the balance.......

    never assume that the problem is where it seems

    the rear tyre will make the front shake too.

    check the chain tension too.

    also static balancing and dynamic balancing produce different results.

    wheels bearings ?

    stiff links in the chain?

    its an S so check the swingarm at the pivot area for cracks.........

    check the front RH side of the steering head frame area for cracks above the radiator


    cheers stu

    Naked TLS 97 , D port heads, TRE, Carrozzaria gold wheels, GSXR750 triples and forks, R1 calipers, Ti Force titanium exhaust system, welded clutch centre, ring-in CCC, polished pressure plate, 999 ducati radiator, custom handlebar fairing, polished ali screen, TLR clocks, Van reservoirs, TLR swingarm, TLR Ohlins rear shock, Norton Commando handlebars on 65mm risers, extra heavy polished billet brass bar-ends, custom shaped seat pad, billet levers and pegs, stainless brake lines, modified airbox, PC11 ,undertail, hugger, clear taillight lens, hidden LED number plate lights, Personal number plate (97TLS),SV coils, ring-in pushrod seal saver.

  3. #3
    Silver Subscriber cyclecamper's Avatar
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    What he said.

    But start with re-balancing both front & rear and checking them for any out-of-round while on the static balance stand or dynamic balance spindle.

    Then check the chain and sprockets.

    It's quite possible they didn't balance it at all, unless you ask them to.

    Come to think of it, I'm not sure whether mine are balanced at the moment...I always should but tend to do it when I find the need, which just inconveniences me to take it back off & on etc.
    It's about control skill; this is a motorized dance for joy and not Russian roulette.

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  5. #4
    Silver Subscriber cyclecamper's Avatar
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    Check the front axle pinch bolts, rear axle nut...

    How's the suspension working?

    It's a TLS< so MAKE DARN SURE ALL THE BOLTS THAT HOLD THE ROTARY DAMPER IN ARE STILL THERE AND BOLTED IN TIGHT without any frame cracks where they bolt in. My second TLS had a frame crack where the rotary damper mounts, so I converted to the R1 shock where the rotary was, and a Bitubo where the SOAS was, and I let them split the damping chores; but that's with a slight extension on the swingarm.
    It's about control skill; this is a motorized dance for joy and not Russian roulette.

  6. #5
    Superbike Twin
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    Try using Dyna beads. I have been using them for a few years now and love them. If you never heard of them they constantly rebalance the tires every time you stop and then go. They are tiny ceramic beads that go in the tires. I use one ounce in the front and two in the rear.
    They are the best $10-$15 you will ever spend.
    2001tls, full yoshi, tre, wiseco fmc104, air box mod, pair removed, -1 +1, R1 damper mod

  7. #6
    Baby Twin
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    Via phone the mechanic who put my tires on says he always balances them, and he is a trustworthy local fellow with good reviews so I expect as much. There do not appear to be any loose bolts, other loose pieces or cracks on anything on the bike. The chain and sprocket both look healthy and the slack/tension is appropriate, although other than that I am not sure what I am looking for. I do not have the tools, time or patience to check any internal parts or the tire bearings. The front shocks are in good shape and the original owner replaced the back shock with an ohlins shock which has been working fine. Today I turned my dampener to the tightest setting (so tight its impossible to make slow turns with) and the vibrations and oscillation still happened but not until I reached about 120-125 this time around. I have been testing in on a straight freshly paved road so I know it is not the road surface causing it either. If I can't figure it out I will look into the beads or another balancing product.

  8. #7
    Superbike Twin win-or-bin's Avatar
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    To be honest if you have checked what the guys said and tires balanced I would point my finger at the tires, sometimes bikes have funny reactions to different tires, had a ZX6 that was unrideable on Dunlop 207gp's (remember them?) but the SRAD took to them fine, changed tyres and then problem went away, bare in mind profile of the tyres are massively different between manufacturers, and even manufactures type of tires (eg supercorsa to supercorsa sp etc etc ) tires so a 120/70 mich can be different from a dunlop. You have mixed to different makes and poss type of tire so could you throw another old back tyre in just to rule that out?
    00' TLS project, on road spring 2011 or else!! (off road 2013), fully modded and back on the road again 2014 spring or else!!!!!
    04 GSXR1000 k4 YOSHI JSB dripping in kit parts and tuned to the balls
    Isle of man 170mph blast on my K4 http://www.youtube.com/watch?v=JGk8o7PWFEQ

  9. #8
    AMA Pit Boss snowblind's Avatar
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    And some tyres just don't mix. Could be the Michelin and the Shinko just don't get on.
    Like my TL I'm old, overweight and badly maintained but I can still surprise you by how fast I can move.

  10. #9
    Silver Subscriber cyclecamper's Avatar
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    Quote Originally Posted by cjinkser View Post
    Try using Dyna beads. I have been using them for a few years now and love them. If you never heard of them they constantly rebalance the tires every time you stop and then go. They are tiny ceramic beads that go in the tires. I use one ounce in the front and two in the rear.
    They are the best $10-$15 you will ever spend.
    Got pics or a link? I'd sure be interested in something to help further balance & dampen my trailer tires. Even when balanced, they bounce more than they should. I'll probably have to start by replacing them, including the spare. They're cheap trailer tires, Continentals I think, I could get much better ones. These are probably bias-ply and I've heard that good radial trailer tires work much better.
    It's about control skill; this is a motorized dance for joy and not Russian roulette.

  11. #10
    Superbike Twin
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    Quote Originally Posted by cyclecamper View Post
    Got pics or a link? I'd sure be interested in something to help further balance & dampen my trailer tires. Even when balanced, they bounce more than they should. I'll probably have to start by replacing them, including the spare. They're cheap trailer tires, Continentals I think, I could get much better ones. These are probably bias-ply and I've heard that good radial trailer tires work much better.

    You can get them at your local Napa or on eBay. Ask for balance beads. Dyna bead is a product name. There are many different manufacturers of them now.
    2001tls, full yoshi, tre, wiseco fmc104, air box mod, pair removed, -1 +1, R1 damper mod

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