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Not wishing to argue but yes I do change down without the clutch sometimes so yes I do know what it sounds like, and a big fat handfull between each downshift (like in the video at 1:10) requires that you disengage the clutch.

These things I know to be true from my own personal experience of riding a motorcycle.
No, it does not require that you disengage the clutch after a 'big fat handful'. All he's doing is unloading the transmission in spirited fashion so the gears can slip in and out easier. I tend do it that way too when there's an audience, I'm riding angry or I'm trying to get someone on a cellphone to hang up and drive.

Comparing your 'sometimes' vs my 100% of the time for 20 years - how sure are you that you're doing it right?

I think maybe the difference in perception here is that your style is more 'row, row, row your boat' and he's using the whammy bar and shredding. You know what I mean? It doesn't always sound like that of course - but occasionally when the spirit moves you....
 
No, it does not require that you disengage the clutch after a 'big fat handful'. All he's doing is unloading the transmission in spirited fashion so the gears can slip in and out easier. I tend do it that way too when there's an audience, I'm riding angry or I'm trying to get someone on a cellphone to hang up and drive.

Comparing your 'sometimes' vs my 100% of the time for 20 years - how sure are you that you're doing it right?

I think maybe the difference in perception here is that your style is more 'row, row, row your boat' and he's using the whammy bar and shredding. You know what I mean? It doesn't always sound like that of course - but occasionally when the spirit moves you....



Have you ever even ridden a motorcycle or have any idea how they work ?
 
Have you ever even ridden a motorcycle or have any idea how they work ?
Interesting. I was going to ask you the same thing.

Lets have a disintereted third party chime in and determine who is correct. I'll accept any judgement from a qualified arbiter.

Bah, you know what, scratch that. Lets just make a wager. $1000 cash says I slap a GoPro to my R and replicate that style and sound clutchless downshifting. Or, better yet, 650ib, Knolly (or anyone with a cam wants to hang) can be the chase bike to verify I never touch the lever. They can post the video on their own YT afterward just so I can't be accused of anything.

If we're gonna do this I expect you'll follow the standard rule of letting someone else hold the money? If Knolly or IB will do it, I trust them. We can wait until the day before to deposit the cash with whoever is going to hold it. (I'll give whoever acts as banker $200 or 10% of the total when I collect).

You in or out?
 
I would never attempt a manually-throttle-blipped clutchless downshift on the entrance to a corner on a track. I use the clutch on downshifts - always - because the shift is much more reliable and predictable and it avoids any possibility of lurching forward, even momentarily, while in the midst of braking for a corner, and it avoids any possibility of upsetting the suspension. This would be doubly true when riding an unfamiliar and very powerful bike ...

For those reasons, I am pretty sure that test rider was downshifting using the clutch there. I sure would. (20+ years roadracing experience, my name is not Valentino Rossi but I do okay for myself on my vintage race bike)
 
I would never attempt a manually-throttle-blipped clutchless downshift on the entrance to a corner on a track. I use the clutch on downshifts - always - because the shift is much more reliable and predictable and it avoids any possibility of lurching forward, even momentarily, while in the midst of braking for a corner, and it avoids any possibility of upsetting the suspension. This would be doubly true when riding an unfamiliar and very powerful bike ...

For those reasons, I am pretty sure that test rider was downshifting using the clutch there. I sure would. (20+ years roadracing experience, my name is not Valentino Rossi but I do okay for myself on my vintage race bike)
Agree to disagree, I would and do, all the time, at any speed. Maybe not so much on vintage bikes but the new slipper clutches are impossible to upset unless they break. (D*mn things work so well you can't even push start a 10R all the way back to '04 - it just won't lock up.) The dog ring transmission in the H2/R is specifically made for that type of use. I probably wouldn't push my luck full lean, but that guy in the video was still in the straight cutting speed - and if you're still downshifting in a turn, lets be honest, you already screwed up.

I assume people know this stuff but if you don't - don't take my word for it;

"A slipper clutch (also known as a slider clutch or back-torque limiter) is a specialized clutch developed for performance oriented motorcycles to mitigate the effects of engine braking when riders decelerate as they enter corners."

Don't get me wrong, I'm not picking on you - everyone has their own comfort level, skill level, weapon of choice and style. I'm just saying that guy was doing something I do every time I ride. I know that sound like I do my own voice. Kawasaki was extremely picky about who they let ride the R. I assure you that guy wasn't doing novice overrev/lever downshift moves like that at Sepang on a 320hp race bike with a dog ring transmission and a slipper clutch. There's just no reason to. It'd be adding a whole extra step to the process, upset to the drive train and adding a bunch of unnecessary friction generated heat to the clutch on a system specifically designed for clutchless up/downshifts.
 
Thank you GoFaster...

That is a lovely video of a clutch being used correctly by someone who hasn't learned to clutchless downshift on a modern sportbike with a slipper clutch designed specifically to allow him to do such things if he cared to learn how.
Fixed it for you. :D

I still don't really understand what we're arguing about. Are you saying that it requires computer control to clutchless downshift properly? If so, my money is on the table now and forever.
 
Find me a video of someone doing clutchless downshifting on track without an auto-blipper. I already showed a video of what I consider to be normal practice on modern bikes.

I'm not saying clutchless downshifting can't be done without electronic aids - it can. But partially pulling in the clutch lever (you will notice in my video that on track, they never actually pull the clutch lever all the way in! - just enough to slip it) guarantees that there will not be a forward lurch from the throttle-blip under braking.

I know of no one in either of the two regional roadracing organisations that I'm in, who doesn't use the clutch while downshifting.
 
Sound effects at 1:10 are caused by pulling in the clutch and giving it some throttle... we can all do that !

Auto blip clutchless downshifts are a completely different thing....
Yeup, I agree. He's rev matching, pulling in the clutch, blip and release. Easy and smooth.
 
Alright, you win. Keep doing it wrong.

The frustrating thing for me here is that you're basically arguing that an 'auto blipper' is the only way to do clutchless downshifts smoothly. ITS CALLED AN AUTOBLIPPER. All its doing is blipping the f'ing throttle for you. Its not doing anything else. I'm arguing that with a little practice, you can blip the throttle youself just as smoothly. 4 pages of taking a dog for a drag later and no one is even willing to consider it.

This entire argument makes my brain hurt.

In ten years I'll probably be having this same argument about wheelies. "Professionals all use auto-wheelie. Sure, you could do a wheelie without it but not at the track. I've got a video to prove it". Good times.

It ain't what you don't know that gets you in trouble. Its what you know for sure that just ain't so. - Mark Twain.
 
If you can do it without the electronic aid, go nuts and do that. Just don't accuse everyone else of "not knowing how to ride" because they opt not to do it that way.

Quickshifter upshifts are worth time on the race track, because a person is not physically capable of shutting the throttle for 50 milliseconds and have it resume at full power. The finite amount of time spent with the throttle less than wide open - even if you are not using the clutch! - is time when someone else who has an automated quickshifter will be accelerating while you aren't.

Downshifting for a corner, on the other hand ... doesn't have that benefit. You are on the brakes anyhow and are wanting to NOT have the engine trying to push the bike forward. As long as you can get the required number of downshifts done before the corner entrance somehow ... good enough. Some people (includes me) individually clutch-in and blip the throttle for each gearchange down, others pull in the clutch once and do all the downshifts and let out the clutch once. The latter approach is facilitated if you have a slipper clutch ... my race bike does not. There is really no difference in lap time one way or the other.

All this is why I'd like to have my quickshifter back (I've flipped the linkage over to use reverse shift pattern) but I'm indifferent to whether the auto-blip clutchless downshifting is enabled or not.

There is one rider in my area who has an (aftermarket) auto-blipper for downshifting (on a Yamaha R1). I would describe this particular rider as a "track day hero". He's put all sorts of gizmos and goodies on that R1, and for all that, he goes to track days with it and does about the same lap times with that tricked out 180 hp newfangled bike that I do with my skinny tire 60 hp 27 year old carbureted bike with no rider aids and old school right-side-up damper-rod forks and with handlebars above the triple clamp - and a rider who is pushing 50 years old.
 
I tried it the other day as well as today and yes you can do clutchless blip downshifts on this bike.BUTif you don't get it EXACTLY right it WILL lurch forward.I certainly WOULD NOT be doing this heading into or setting up for a corner.This was done in a straight line just for shits and giggles and I repeat if your doing this whilst braking for a corner or setting up for one IT WILL BITE YOU IN THE ASS sooner or later.IT IS SOMETHING I WILL NOT CONTINUE TO DO AT ANY STAGE IN THE FUTURE AS I JUST WANTED TO SEE IF IT COULD BE DONE.
 
Quickshifter upshifts are worth time on the race track, because a person is not physically capable of shutting the throttle for 50 milliseconds and have it resume at full power.
So true and it reminds me of sprinting my old Kawasaki 1100 back in the eighties.

It was a carburettor engine, not injection and when you shut the throttle to change gear the slide would drop and then the vacuum would pull it up again when you re-opened the throttle. That all took time.

One modification was to enlarge the hole that the air bled through so the slide moved a little quicker. This was part of the Dynojet set-up, they included a little drill in the needle kit - but it still took time for the slide cycle down/up.

Our solution was to keep the throttle wide open and fan the clutch while up-shifting. The revs would rise towards the limiter and the throttle slide would remain up, the gear would shift and when the clutch bit again it would drive the bike forward. We reckoned it was worth around a quarter of a second over the quarter-mile.
 
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