Changing gear without clutch

[Doovy]

I think i read on here, in the past few days, that it is possible to change gear without the use of the clutch.. it went something along the lines of


"rev highly in the gear, close the throttle fast while pushing up on the gear lever and re-engage the throttle and the gear will change up"


can someone explain how and why this works to me please? ive been doing it a few times recently on motorway to save pulling in the clutch, is it damaging to the bike at all?

and i cant for the life of me remember where i read it!



thanks

Dave
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Yamaha RXS 100 > Honda CD 250 > Honda Hornet 600 > Honda CBR 600RR > Yamaha RXS 100 > Kawasaki ZX6R J2 > Yamaha FZ1

[Alex-RS]

It's not damaging as bikes have sequential gearboxes.

https://auto.howstuffworks.com/sequential-gearbox.htm

Clutchless gear changes have their advantages, if you get it right.

[Mil17b]

[dunc4230]

what they say but dont change down or you will f**k up your gearbox
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[Faldo]

[Acemastr]

i've done it a few times, i find the bike jumps when i upchange which makes me look like a tit. and remedies?
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2017 KTM 350 XC-F - 2014 Yamaha R6 - 2005 Yamaha YZ125
2016 Toyota Tacoma Limited

[Faldo]

[D O G]

[Faldo]

[Acemastr]

[frez]

Once road all the way from London to Dorset without a clutch, only realised when approaching the first roundabout on the A31, then nursed it the rest of the way timing entry and keeping fingers crossed at every junction. A bolt attaching the throttle cable to the engine had come loose (had been serviced the week before at a main dealer!).

[bEN_]

You can change up or down without the clutch, you just need to do it right, if your on an old R6, your screwed whatever you do
changing down without using the clutch isn't really helpful on the roads though
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2010 Ducati 848 Dark

Lamp Post Enthusiast

[Acemastr]

can anyone shed some light on why my bike jerks violently when changing up in any gear at any revs (i don't do 1st to 2nd)
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2017 KTM 350 XC-F - 2014 Yamaha R6 - 2005 Yamaha YZ125
2016 Toyota Tacoma Limited

[m0l0t0v]

[Acemastr]

handy tip there :p

say for example i get to 8.5k rpm, apply slight pressure to the gear shifter, flick wrist forward, lift foot, flick wrist back.

didn't think there's anymore to it?
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2017 KTM 350 XC-F - 2014 Yamaha R6 - 2005 Yamaha YZ125
2016 Toyota Tacoma Limited

[m0l0t0v]

You're probably not getting the throttle on time with the gear shifting. It has to be done really quick. If you don't do it quick it would probably jerk forward like you mention.

Try being faster
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'99 Hornet 600 , VFR 400 NC30 '92 , Kasawamasaki GT 550 , '98 Hornet 600
**\Tarmacsurfer/** said: It's that immaculately manly coiffure of yours isn't it. One glimpse of your virile locks and the punters can't wait to buy whatever it is you suggest, as it might let them be just a little bit like the Adonis that is our very own Molly Doovydoo said: Its not my fault I can't get it up properly, I just wasn't blessed

[TheDonUK]

And dont flick your wrist forward just ease off a bit, i find that the moment you are not actually accelerating it will slip up into the next gear pretty simply...
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[Current Bikes - GSXR-750 K5 & C90-97 ] [Previous Bikes: Runner 125, YBR 125, GS500, Bandit 600, Hornet 600, ZX6R-99, C90-99, R1-99, XT600E-04, GSXR-750 K4, CRF250L '16]

[mooserx]

no clutch gear changing rocks, i find you can get better acceleration if you do it right, as with most things in life, it's the timing thats important.
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TL1000r-handful.

[bEN_]

Just get a quickshifter.

no one gives a fuck about the fact it gains you so many yards with a few easy changes it just makes the damn thing easier to ride.
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2010 Ducati 848 Dark

Lamp Post Enthusiast

[thx1138]

I rode a TS-125 20 miles home without a clutch once.

I tried to ride a KM-125 home in 6th gear when the gear stick fell off.... that didn't work out so well.

[magpiemale]

[repsolblade]

try doing a trackday using your clutch for every change, you'll have a forearm like popeye.
or wankers cramp after 1st session
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( TS50 RD80Lc RD125Lc CBR600 ZX7x2 SP1 CBR900 CBR1000rr GSXR750 CBR600)

[Clansman]

Just the kind of thread I was looking for. Thanks for shedding light on it - I wasn't sure if current bike gearboxes were sequential or just a different weird kind.

Being sequential, they are designed to change gears without de-clutching. In fact, some gearbox manufacturers even argue that using clutches between gear changes in sequential gearboxes actually damages the cogs further than if not using it... seems weird at first...

Theoretically, all that's necessary is to cut the load from the engine to the gearbox and it will happily change gear if you tell it to. [To cut the load is actually very different than to cut the throttle]. I reckon it should jerk a little even if done perfectly right because the moment the gear changes, the engine keeps its revs, the wheels keep their speed but you're changing their ratio, so they *will* have to adjust and that will be felt by the rider.

This involves (as already discussed) lowering the throttle slightly so that the engine neither pulls nor slows the bike. In a small rev interval around that spot, the gearbox will change gear. Both in cars and in bikes, this can be eased by applying a bit of pressure on the gearbox lever while lowering the throttle. With a bit of practise, it will go well.

Actually, synchro meshes allow us to do a similar thing in our cars' manual 'boxes. If done right, it's perfectly smooth . If done wrong, there's this horrible crank noise that makes everyone look at you and you feel like a n00b that forgot to de-clutch , hehehe.

I've read a Hewland gearbox manual (seq, for cars) in which they explained that the correct technique for changing gear *should not* involve the clutch.

I'm not a specialist, just curious, so I may be wrong.

Cheers guys,
Pedro.