Im confused! changing gear without using clutch

[bugsy46]

Hi I was wondering when you ride a production bike if it is ok to not use your clutch! for example when you watch the gp bikes they change gear without using the clutch thus not losing the revs! is it a matter of getting the revs just right or what? please help!!
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[Demonic69]

The GP bikes will probably have quickshifters. But changing without clutch is dead easy and knocks seconds off a 1/4 mile time.
Changing up: Put pressure on the gear lever, dip the throttle and the bike will probably change on it's own.
Down: Same again but blip the throttle instead.
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[Mr C]

not advised to change down without using the clutch

it can be done but can damage everything while you get it right

changing up is exactly as D says


although if it could shave SECONDS off quarter times I'd be running 3's
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187.3bhp = 201mph

[Demonic69]

I knocked a good second or 2 off Was on the 400 and still got over 15 but
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Back on a Blade. Just feels so right.

[Claud 14.7 to 1]

Do you guys/gals use clutchless up-shifting all the time then? Or just when going full on?

I have never used clutchless shifting.

On Moto GP bikes, the the rpm cuts the right ammount, automatically, when they up-shift so they can just use W.O.T when up-shifting .

[Demonic69]

I use it most of the time now. generally have to concentrate when I try to use the clutch
____________________
Back on a Blade. Just feels so right.

[Mr C]

you can shift with a WOT on any bike - you have to fit a Quickshifter as D said

it's basically just a switch that attaches to the gear lever, when it senses enough pressure or movement it sends a signal to a kill box which interrupts either fuel or ignition just long enough to engage the next gear


I only upshift without the clutch at very high rpm, it's a bit jerky low down

I run 10.5s on flyer gearing
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187.3bhp = 201mph

[Claud 14.7 to 1]

[AcIdBuRnZ]

Yeah, you think you are shifting quickly - try it without the clutch and you'll feel the difference
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[loply]

How much does a quickshifter cost?

I often shift up on my car without the clutch, just push the lever gently into the next gear and for a second it stays there, then when the RPM matches the gear it pops in of its own accord. Same for going down gears, but its trickier.

[kev]

It tends to bugger up gear boxes on cars doing that.
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[Claud 14.7 to 1]

Hehe, yer i'd say...

What the point anyway, if you practice you can get changing gears in cars, very fast. (much quicker that all that gently move gear stick....) business.

Believe my i've tried...

[Mr C]

[loply]

Are DIY quickshifters feasible, and do they work well if so?

[dibbster]

[Kickstart]

WOT = Wide Open Throttle

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[dibbster]

well its obvious now.
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[Claud 14.7 to 1]

[Mr C]