Tankslappers explained

[Shaun]

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Thats very interesting Shaun, whats your opinion with respect to linked brakes eg Blackbird X11 et al?

Only my opinion!

I hate the linked break thing, I really believe that the rider should be in controll of there own destiny, but I also hate ABS systems, you cannot stop as quick with ABS as you can with a normall system

[Ixion]

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..

I discoverd by fluke and practice the best way for me to deal with tank slappers

I have always applied the rear brake and kept the throttle pinned, this soughts them out very very quick! Now this goes against what most have said in here about moving your weight forward, because appling the rear brake takes the weight of the front wheel and transfers it to the rear?

.

That was pretty much the accepted wisdom back in the day when they were common on road bikes. Pin the throttle and stay away from the front brake, keep the front end light.

EDIT. Since the true slapper only occurs when frame flex coincides with shake frequency (or harmonics thereof), probably any major redistribution of wheel load or weight may change the frame flex frequency enough to break the amplification cycle. So all those things may work.

[Blackbird]

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So, essentially a tankslapper is an uncontrollable dynamically amplified head shake, that, unlike a normal head shake, does not stabilise.

Thanks Shaun and Ixion, much clearer now. It sorted it out by itself thank goodness, I was preparing to get hurt so there was no intervention from me.

[Finn]

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Do you have any contact details for the tapping to be done?

You lookin for a head shake?

[Shaun]

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You lookin for a head shake?

I will take what I can get, but a full on slapping would be much more betterer

[Jimmy B]

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Only my opinion!

I hate the linked break thing, I really believe that the rider should be in controll of there own destiny, but I also hate ABS systems, you cannot stop as quick with ABS as you can with a normall system

Thanks Shaun,

I quite like linked brakes but you skill level and mine would be worlds apart

I was more referring to your comments about applying the rear and pinning the throttle to sort out a TS. Linked brakes will fire a pot on the front when you apply the rear; do you think that your technique would still work despite this automatic application of a little front brake?

[N4CR]

i find on the two bikes i've ridden the most, slappers are very related to the tyre pressures (of course surface causes them though but the thign that lets them is the pressure). almost been spat off like lou's first post on the zxr250, same speeds same thing. had bike going between my thighs leg to leg like the iom clip everyone has seen and almost toppling off it... many many slappers on that thing and the 10r lately (pressures too high!!!)

[Shaun]

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Thanks Shaun,

I quite like linked brakes but you skill level and mine would be worlds apart

I was more referring to your comments about applying the rear and pinning the throttle to sort out a TS. Linked brakes will fire a pot on the front when you apply the rear; do you think that your technique would still work despite this automatic application of a little front brake?

No mate, I do not think my technique will work in this situation

[Shaun]

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i find on the two bikes i've ridden the most, slappers are very related to the tyre pressures (of course surface causes them though but the thign that lets them is the pressure). almost been spat off like lou's first post on the zxr250, same speeds same thing. had bike going between my thighs leg to leg like the iom clip everyone has seen and almost toppling off it... many many slappers on that thing and the 10r lately (pressures too high!!!)

You can also all but gaurantee that the stearing head bearings are to loose and not packed with grease properly, allowing the stearing axis to be loose and subject to a lot of movement by bump stearing on the road

[Disco Dan]

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You can also all but gaurantee that the stearing head bearings are to loose and not packed with grease properly, allowing the stearing axis to be loose and subject to a lot of movement by bump stearing on the road

So would a shot steering head bearing be a high contributing factor to a tankslapper?

[Edbear]

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So would a shot steering head bearing be a high contributing factor to a tankslapper?

Probably, since they're at the top...

[avgas]

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3. Not all sportbikes need a steering damper, however. Many have steering geometry setups that offer quick handling, while still providing the necessary stability to damp out any front-end oscillations.

Fazer is awesome at this, i just about dropped her comming out of the classic races. Back tyre was full of gravel in the grip and i opened the throttle only to have the back kick out and drop the bike to a 20 degree angle before i killed the throttle and threw the bars back up again.
Didnt have time to get the stabiliser out, was so thankful that i didnt have clipons then.

[avgas]

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You can also all but gaurantee that the stearing head bearings are to loose and not packed with grease properly, allowing the stearing axis to be loose and subject to a lot of movement by bump stearing on the road

Its funny you mention that cos i had the exact opposite happen when my bearing was failing on one of my previous bikes. It didn't like turning - like it had a dampener on it.

[Shaun]

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So would a shot steering head bearing be a high contributing factor to a tankslapper?

Very well could be

[Shaun]

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Its funny you mention that cos i had the exact opposite happen when my bearing was failing on one of my previous bikes. It didn't like turning - like it had a dampener on it.

Which could also cause slappers