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Toast
11th October 2006, 14:04
What does 100km/h straight line wheelspin feel like?

I'm curious as to whether the below experience is likely to be wheelspin or the bike popping out of gear?

I thought I'd give wheel standing in the wet a go this morning. To my surprise, it actually came up really sweet and fast (go the Pilot Powers).

I dropped it down at about 100, since going past that is reputed to cause instant death of all within sight, and gave the throttle a bit of a blip to soften the landing.

It didn't soften the landing much though, and it felt like the bike had just popped out of gear, with the revs spinning up to near redline, which it has never done to me before. But, it felt really planted, no swaggering of the rear like when spinning it up on the polished concrete of my work carpark.

Any ideas on this?

Cheers.

beyond
11th October 2006, 14:12
Sounds like you were right in the meat of the torque range and the wheel spun up.

I've overtaken some cars coming back from Napier to Taupo and as I pulled out to overtake and came alongside on an overtaking lane, my tacho redlined
and they were looking at me and I was looking at them and I wasn't going anywhere. :)

Not much fun if the rear decides to try and overtake the front though, but if everything is aligned right and you are completely straight, it does happen.

Devil
11th October 2006, 14:33
This is also assuming you didnt bump the clutch when you blipped the throttle. Some a fairly sensitive (depends on how you like your levers really).

The only 100km/h wheelspin i've had was pretty obvious.

WRT
11th October 2006, 14:35
Just grab another gear and pull the throttle back on . . . Sooner or later you will feel it take up, the speed gently builds and the rev's gently drop back down until all of a sudden the bike screams towards the horizon as the revs start climbing again. Great fun (if you are expecting it), but keep it in a straight line.

JimO
11th October 2006, 14:57
many years ago i saw a guy on a big jap bike take off at the lights in Dunedins Octagon, smoked the back tyre as the front wheel lifted off the ground about 2 feet.it may be hohum now but in 1977 it was bloody fan-tastic

Fishy
11th October 2006, 14:57
Bike didn't jump out of gear into neutral did it?

Toast
11th October 2006, 15:00
Definitely no clutch involved in it.

It seems it probably was wheelspin then. I've just never experienced it at speed, in a straight line, only out of the odd corner here and there, so it just seemed weird to me that the back didn't step out even the slightest amount.

All good...

DEATH_INC.
11th October 2006, 15:03
Sounds like 'spin to me, quite often at speed it won't try to go sideways on ya...

Toast
11th October 2006, 15:13
Bike didn't jump out of gear into neutral did it?

That was my first thought...but thinking about it now, it dropped and accelerated afterwards, so unless it jumped back in to gear by itself...prob not.

arj127
11th October 2006, 16:14
at 100kph years ago. Was on the motorway doing 90 behind a car (damp road), only slighty cracked the throttle open to pass and immediately the bike was redlining. Thought i had blown the clutch so backed off, tail started swapping a little so put the power back on and it came straight. A freaky feeling first time, know to just roll the power on in the wet now.

Lou Girardin
11th October 2006, 17:26
I had the rear spin up at 110 k's while overtaking and I sure knew about, the bitch tried to highside me.

bugjuice
11th October 2006, 17:40
i've had a few from clumsy downshifts (so more chatter/lock-up), but also got touchy in the wet too and some were from trying to wheelie too.. felt like it was gonna keep goin straight.. most of the time... :o

onearmedbandit
11th October 2006, 17:53
Had spin before at over 100km/h in the wet, sometimes you only notice the revs rise rapidly, other times you notice the back wheel coming around to greet you!

Titanium
11th October 2006, 18:15
Front straight at Manfield on the Shaun Harris track day ...... hit the white paint in the wet at the same time as the power came on ...... wheel spin about 160 -180 kmh ....... was a pucker moment ......

TonyB
11th October 2006, 18:16
Yep, sounds like spin all right. As the wheel is spinning pretty fast it no doubt is pretty hard to push off line- gyroscopic forces etc. I've had the FZR wheel spinning for ages at high speed on gravel, the rear just tweaked a bit to the left (road camber I guess) and stayed there.

Kyle
11th October 2006, 18:16
Yeah sounds like wheel spin to me. Ive done many wheel spins in the wet and generally speaking they will stay straight and feel like clutch slip (on my latest bike it actully was clutch slip, untill i replaced it) I dont recomend it, because "sustained loss of traction" is instant impound vehicle and license loss too i think, But coming around a low speed corner onto a striaght, lean forward to lighten the weight on the back wheel, bang the throttle on and clutch it, can do 'fish tails' for quite a fair distance that way. Do make sure you keep the throttle on, that way the fish tails slowly get smaller and smaller untill you grab traction. If you back off the gas during a wheel spin, thats when the back wheel is likely to step out and try to pass the front wheel as they say. Pretty standard sort of thing if you ride a dirtbike, they are always getting the back wheel spining. Unlike a car you actully steer the bike with the back wheel, sounds odd i know and ill problery cop some flak for it, but as an example dirtbikers often get around a corner with the front wheel in the air, the lean angle on the back wheel does the turning. Problery said too much, so thats enough from me.
:beer:

Forest
11th October 2006, 18:47
Front straight at Manfield on the Shaun Harris track day ...... hit the white paint in the wet at the same time as the power came on ...... wheel spin about 160 -180 kmh ....... was a pucker moment ......

I did that once while overtaking on a wet road. I hit the centrel-ine at full throttle doing 130km/h and unhooked the rear wheel.

Didn't crash or massively unsettle the bike, but it really wasn't a nice feeling.

boomer
11th October 2006, 18:58
i've done it on the on ramps in the wet, all excited to get to Puke with Logan, gave it a handful and the first i knew was the noise! Logan couldnt stop laughin at my 1*0km/h burn out :whistle:

speights_bud
12th October 2006, 08:25
Have managed to experience this on the 250, coming back to Napier from a weekend in Wellington on the Takapau road which is slick tar with no stone chip in the wheel tracks in most places.

But with relativley heavy rain. passing cars the rear tyre would spin up at about 110 across the line and wallow left and right in the other lanes wheeltrack. Thought it was pretty funny at the time, passing cars in a squiggly fashion.:wari:

emaN
12th October 2006, 13:10
"Wheelspin at speed" is when David Jefferies talks (talked) about flying across the top o' the Mountain at 140mph, rear spinning up at will.

Watching them boys go thru' Glencutchry Rd in the wet is incredible;come past, sligthly leaned over, bikes squiggling side to side, power stays on, lean right then left then off away down Bray Hill.

But yeh, sounds like you got the right kinda spin

sAsLEX
12th October 2006, 13:24
i've done it on the on ramps in the wet, all excited to get to Puke with Logan, gave it a handful and the first i knew was the noise! Logan couldnt stop laughin at my 1*0km/h burn out :whistle:

Didnt SA Alstare rider drop his bike after it stepped out heading out of the Autobahn?!?

Might pay to be careful.....

The_Dover
12th October 2006, 13:31
c'mon boomer, that honda struggles to spin it's wheels from stationary in the wet!!!

TLDV8
12th October 2006, 13:36
What does 100km/h straight line wheelspin feel like?

I'm curious as to whether the below experience is likely to be wheelspin or the bike popping out of gear?

Any ideas on this?


If it popped out of gear you would have needed to pop it back in.
If it is a newish bike,the speedometer pick up is reading off the engine drive sprocket so the speedometer would increase as would the tacho with no extra forward motion if there was loss of traction.

Wheelspin in the wet,try a CBX1000 with 105hp at the crank and a 120 rear tyre,you could light them up in the dry also coming out of roundabouts.

Another good one is aquaplaning on the motorway.