 2012 Speedmaster - rear wheel lock-up
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Joined: Aug 2013
Posts: 3
Complete Newb
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OP
Complete Newb
Joined: Aug 2013
Posts: 3 |
At first I thought my rear brakes were too sensitive, but now it seems the wheel locks up even when down shifting strongly as well. It there a problem with the stock tire of what is the issue here?
Anybody knows the answer to this?
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Feb 2007
Posts: 23,246 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,246 Likes: 64 |
Maybe the bearings? Not sure with so little info, not even a year or model.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
Joined: May 2010
Posts: 5,720 |
If your skidding the rear in a downshift, you have some sweet compression. 
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Mar 2009
Posts: 12,964
Stickman Yogi
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Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
No offense or anything, but it could be operator error.
Live to love, love to live.
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: May 2007
Posts: 5,068 Likes: 1
Saddle Sore
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Saddle Sore
Joined: May 2007
Posts: 5,068 Likes: 1 |
Yup, if your rear wheel is locking up on a downshift, methinks you're dropping down way too many gears and dumping the clutch too fast.
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Feb 2007
Posts: 23,246 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,246 Likes: 64 |
I agree if only on downshift. Bearings would have to be really bad to lock the wheel and if they were that bad they wouldn't keep freeing up they would seize and stay that way probably damaging the wheel.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Apr 2007
Posts: 3,063 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
Posts: 3,063 Likes: 8 |
Do you have a tach onboard? Are you downshifting too many gears? What type of road conditions do you have? Can you spin out on hard acceleration? What kind of rear tire do you have, condition? Scratching here 
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Jan 2008
Posts: 1,176 Likes: 15
Learned Hand
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Learned Hand
Joined: Jan 2008
Posts: 1,176 Likes: 15 |
I had the rear wheel lock up on me once. Turned out to be a laptop computer stuck between the fender and the tire.
Moments later I realized it was my laptop computer, now somewhat bent.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Jan 2005
Posts: 11,126 Likes: 13
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 11,126 Likes: 13 |
Quote:
At first I thought my rear brakes were too sensitive, but now it seems the wheel locks up even when down shifting strongly as well. It there a problem with the stock tire of what is the issue here?
Anybody knows the answer to this?
Does the wheel spin freely? Is it only locking up on braking and/or downshifting? Our binders are not so hot. Matter of fact they barely get the job done. Locking up the rear wheel by downshifting is an age old issue solved by slipper clutches (or being mellow on the downshifts  )
Blowing gravel off rural roads
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Jul 2011
Posts: 2,212
Oil Expert
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Oil Expert
Joined: Jul 2011
Posts: 2,212 |
One other thing, just in case, make sure you check the rear brake plunger (the rod) make sure it is not set up to high, sometimes when the rotors get hot and expand they will move closer to the pads thus less throw if any required on the rear brake. so if you are downshifting hard and on the rear brake even a little bit , it might only take a wee touch to lock those suckers up......ask me how i know this :-)
2007 Speedmaster and miss it!
2013 T-Bird Storm and Luvin it!
Catching a yellow jacket in your shirt at 70 mph can double your vocabulary
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Apr 2012
Posts: 210
Adjunct
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Adjunct
Joined: Apr 2012
Posts: 210 |
Heinno, Would be interested to hear you follow up on this thread!
wiredgeorge
TX Hill Country
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Re: 2012 Speedmaster - rear wheel lock-up
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Joined: Apr 2008
Posts: 148
Adjunct
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Adjunct
Joined: Apr 2008
Posts: 148 |
Possibly to much air pressure back there? Or a brand spanking new tire?
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