First tank slapper

[FJRider]

Yeah, I remember my first one! I was 19 and was single at the time. She had been with at least half of the team already, or so the stories went....
....she wasn't unattractive, but had a bit of an Amy Winehouse kind of air about her.
We were all out on the town, and, well, you know the rest!

Those slappers are built like a tank ...

[YellowDog]

Yeah, I remember my first one! I was 19 and was single at the time. She had been with at least half of the team already, or so the stories went....
....she wasn't unattractive, but had a bit of an Amy Winehouse kind of air about her.
We were all out on the town, and, well, you know the rest!

The never look as good in the morning:

[vifferman]

Meh.
Both the current bike and previous one (FahrtSturm) would waggle the bars coming out of corners hard on the gas in second. Love the feeling of sliding the rear then having the front coming up as the rear tyre hooks up.

Fortunately, neither had radical enough steering geometry that things got out of hand, although I've had the steering very slightly crossed up and then it's jerked itself straight again as the front tyre's gripped again.

[Ixion]

That's head shake , not a slapper. Still very frightening and dangerous though. A slapper is when you get head shake (like happened to you), BUT it happens that the shake frequency is a harmonic of the natural resonance frequency of the frame. So the oscillation becomes self amplifying, and the "slap" gets worse and worse, until it smashes the lock stops off and smashes the forks into the tanks (and mashes your hands if they're in the way). Fortunately, a true tank slapper is very very rare nowadays.

[p.dath]

That's head shake , not a slapper. Still very frightening and dangerous though. A slapper is when you get head shake (like happened to you), BUT it happens that the shake frequency is a harmonic of the natural resonance frequency of the frame. So the oscillation becomes self amplifying, and the "slap" gets worse and worse, until it smashes the lock stops off and smashes the forks into the tanks (and mashes your hands if they're in the way). Fortunately, a true tank slapper is very very rare nowadays.

Gees, hope I get to avoid that happening!

[FruitLooPs]

Gees, hope I get to avoid that happening!

Like so
http://www.youtube.com/watch?v=V1W5HN40bpw

[McJim]

I experienced my first one at Pukekohe a couple of years back. Just turning into the back straight on a ZX636 and pinned it. Front wheel lifted, I eased the throttle to bring the wheel back down and it was not in line hence started wobbling a bit. Didn't ease the throttle but tucked down on the tank to lower centre of gravity and all was well so pinned the throttle again and enjoyed the rest of the back straight :

Did another one recently in town exiting a roundabout a wee bit too briskly

[cowboyz]

the 9 coupled with really shit suspension, headshakes are really common. I think Im just so over it now I just dont bother getting excited about it. Had 2 or 3 tank slappers. A beauty in the wet passing a car. That was a entertaining 45mins (or was it 1.5 seconds.. felt like longer) I dont care what anyone says.. if you get in a real tank slapper and get out of it.. its pure dumb luck you didnt get spat off.

[Kiwi Graham:Me]

Good on ya for getting away with your first tank slapper Phil, sounds like you did all the right things.
Once youve had a tank slapper always give the front brakes a couple of pumps, bad ones can shake the pistons back into the calipers.
Not doing this could induce your next experiance, when you get to the next corner, grab a handful of front brake to realise it aint there! Tip in anyway and wham, there's your front wheel slide ha ha. Two experiances in one go!!

[p.dath]

Good on ya for getting away with your first tank slapper Phil, sounds like you did all the right things.
Once youve had a tank slapper always give the front brakes a couple of pumps, bad ones can shake the pistons back into the calipers.
Not doing this could induce your next experiance, when you get to the next corner, grab a handful of front brake to realise it aint there! Tip in anyway and wham, there's your front wheel slide ha ha. Two experiances in one go!!

Pump the brakes, ok will try and remember that one.

[lanci]

I hope I don't encounter the full on tankie, the recent head shakes aren't too bad as the wide bars on the Trumpy make it seem controllable.

[PeteJ]

Phil, please remind me at the next ART day to have a chat with you about this.

[Scotty595]

My first one was more a a head wobble than a full on tank slapper still scary all the same, my second one was pretty scary though, going along the motorway in the wet, felt pretty lucky to get out of it, although i think some of what has been said in other threads helped keep me up, although the foot coming down touching the motorway to stabilise the bike was pure luck that it worked.