Motorcycle Racing Forum

Motorcycle Racing => Wrenching => Topic started by: Fast Cletus on June 12, 2009, 04:33:45 PM

Title: Whats the group opinion of clutchless up shifts?
Post by: Fast Cletus on June 12, 2009, 04:33:45 PM
Yeah or Nay?
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: GSXR RACER MIKE on June 12, 2009, 05:04:30 PM
What's this clutch thing you speak of?  :ahhh:
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: Burt Munro on June 12, 2009, 05:18:01 PM
Quote from: GSXR RACER MIKE on June 12, 2009, 05:04:30 PM
What's this clutch thing you speak of?  :ahhh:
That explains a lot in your situation!   :ass:
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: tzracer on June 12, 2009, 05:52:20 PM
Far more people do not use the clutch for up shifts than use the clutch.

Done properly, it does not cause any extra wear to the transmission.

I do know people who do clutchless downshifts. I do not recommend doing this.
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: roadracer162 on June 13, 2009, 09:10:28 AM
I like them. Sadly though the FZR is a little rough on shifts and many times require the clutch. The Ducati with GP shift and a quick shifter is the bomb and I swear I must have shaved at least one second a lap.

Mark
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: GSXR RACER MIKE on June 13, 2009, 10:16:45 AM
Quote from: Burt Munro on June 12, 2009, 05:18:01 PMThat explains a lot in your situation!   :ass:

:wtf: Someone just explained to me that there's a transmission on my bike with more than 1 gear - why didn't someone tell me this a long time ago!  :wtf:
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: ronhix on June 13, 2009, 11:13:43 AM
http://www.youtube.com/watch?v=0AJXsVj-PMg&feature=player_embedded
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: Woofentino Pugrossi on June 14, 2009, 12:13:15 AM
Quote from: tzracer on June 12, 2009, 05:52:20 PM


I do know people who do clutchless downshifts. I do not recommend doing this.

*raises hand*:biggrin: 85K miles on the original trans. drums fine, shift forks are fine gears are fine. Has created a couple "entertaining" moments clutchless downshifting though.
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: spyderchick on June 15, 2009, 02:58:16 PM
Quote from: skidMARK on June 13, 2009, 09:10:28 AM
I like them. Sadly though the FZR is a little rough on shifts and many times require the clutch. The Ducati with GP shift and a quick shifter is the bomb and I swear I must have shaved at least one second a lap.

Mark

New clutch basket for the FZR every now and then solves that issue. Also, you can file the splines on the basket at least 3 or 4 time before you need a replacement. ;)
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: Xian_13 on June 15, 2009, 10:46:28 PM
Quote from: spyderchick on June 15, 2009, 02:58:16 PM
New clutch basket for the FZR every now and then solves that issue. Also, you can file the splines on the basket at least 3 or 4 time before you need a replacement. ;)

That reminds me....
I have a clutch basket that used to belong to you.
Its in a much better place now.
:P

XIII
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: Fast Cletus on June 16, 2009, 08:13:50 AM
so what the process of making a smooth clutchless up shift? I assume, off the throttle, shift,  and back on the throttle?
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: spyderchick on June 16, 2009, 09:22:14 AM
Quote from: Xian_13 on June 15, 2009, 10:46:28 PM
That reminds me....
I have a clutch basket that used to belong to you.
Its in a much better place now.
:P



XIII

Hopefully making laps somewhere. :)
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: GIGOLO on June 16, 2009, 09:59:42 AM
Quote from: ronhix on June 13, 2009, 11:13:43 AM
http://www.youtube.com/watch?v=0AJXsVj-PMg&feature=player_embedded

Anybody who has had a clutch go out on them has learned that if you match revs to wheel speed to can change gears easily.  I drove home from Chicago to Naperville in my piece of shit truck with no clutch.  Running starts for first and then the rest just click in.  Whats with the white shit on his face is he exfoliating?

Quote from: Fast Cletus on June 16, 2009, 08:13:50 AM
so what the process of making a smooth clutchless up shift? I assume, off the throttle, shift,  and back on the throttle?

I think it was a class I was taking on constant mesh transmissions, which most bikes have, that said you actually dont have to get completely off throttle.  Just enough to unload the trans. 
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: Mouse on June 16, 2009, 02:57:43 PM
Quote from: GIGOLO on June 16, 2009, 09:59:42 AM
I think it was a class I was taking on constant mesh transmissions, which most bikes have, that said you actually dont have to get completely off throttle.  Just enough to unload the trans. 

Yeah, what he said.

Pre-load your shift lever.
Then roll slightly off your throttle. It will pop into the next gear. Then roll back on - all in 1 quick moment.

Then go get a quick shifter for your dynojet or whatever and let the computer do all the on/off for ya  :)
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: Ducmarc on June 16, 2009, 09:40:50 PM
i don't really think you ever get completely off the throttle anyway. everytime i try up shifting with a clutch it seems to muck things up . i do wonder if i'm the only fat guy that fans the clutch out of the corner on a 125  that's my bad habit from mx days
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: tzracer on June 17, 2009, 11:24:44 AM
Quote from: Ducmarc on June 16, 2009, 09:40:50 PM
i do wonder if i'm the only fat guy that fans the clutch out of the corner on a 125  that's my bad habit from mx days

No you are not, I occationally heard it while passing people.
Title: Re: Whats the group opinion of clutchless up shifts?
Post by: 123user on June 17, 2009, 03:41:06 PM
On most bikes I've ridden its almost always faster to forgo the clutch.  On my current ride, a ducati 1000ss, the front gets very upset (and I get very scared) without a little clutch action.

I don't think you should think of the clutch as an all or nothing sort of thing.  Just a little disengagement is usually enough to ease the violence of the change-up.