shane661
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posted January 07, 2007 04:04 PM
Clutchless Shifting and Trans Wear?
I always clutch shift, with no problems. However, I have noticed on video of my drag runs that the bike bangs the limiter for a split-second between shifts. You can hear a quick "pop-pop".
I was thinking of getting a dynojet quickshifter which will kill the ignition, allowing full-throttle clutchless shifting.
Will this likely lead to increased gear wear, and popping out of gear? I would be using through all the gears at Maxton.
  
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Bently
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2012 14r In Blue and no Mods!
Posts: 5428
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posted January 07, 2007 06:03 PM
You won't see any more wear with clutchless shifting if done right. I've had the quick shifter on my zx14 since new and have 4800 miles on it now with 80 dragstrip passes and I use the quick shifter on the street all the time as well.
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dougmeyer
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posted January 07, 2007 06:36 PM
How can your bike hit the limiter? You're either off/on the throttle or, if using an air shifter, cutting fuel or ignition? Makes no sense. You can't move the shifter under power......
D.
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Y2KZX12R
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CompetitionCNC.com
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posted January 08, 2007 04:41 AM
You can do clutchless shifts without anything added to the bike. Anything over 1/2 throttle and I rarely use the clutch. Full throttle I would never use the clutch. My basket would be in pieces if I did.
But It will wear out your fork over time. My fork was toast after 18,000 miles of clutchless full power shifting on a constant basis on the street. At the drags you could go years and years i suppose.
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Y2KZX12R
CompetitionCNC.com
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ninja12
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posted January 08, 2007 05:11 AM
quote:
How can your bike hit the limiter? You're either off/on the throttle or, if using an air shifter, cutting fuel or ignition? Makes no sense. You can't move the shifter under power......
D.
I think he fans the clutch at full throttle to unload the engine.
When I first started racing I did also.
Your rpms will shoot up until the clutch can regain lock-up.
That is not the fastest way down the track!
Practice speed shifting "clutchless" on the street and I'll bet your times drop within the first
3 trip to the track.
Get a air shifter and it will help your 60' , and you know times go down from there.
(waiting for this one) 
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Shane661
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posted January 08, 2007 01:15 PM
 Edited By: Shane661 on 8 Jan 2007 13:17
quote:
How can your bike hit the limiter? You're either off/on the throttle or, if using an air shifter, cutting fuel or ignition? Makes no sense. You can't move the shifter under power......
D.
I'm not sure what you mean as far as "how is it possible?". As I said, right now I am clutch-shifting the bike, and the revs are spinning up for a split second as I pull in the clutch during each shift. At least that is what I assume is happening. The "pop-pop" sound between shifts is audible on tape. I am not "fanning" the clutch, maybe just not rolling off the throttle quickly enough.
At any rate, Y2k has answered my question. Thanks.
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VincentHill
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posted January 08, 2007 03:21 PM
Shane, I JUST took my trans apart 2 weekends ago. Because I have a lock up I MUSTshift withoug using the clutch. Even to my critical eyes I have never seen a Trans in better shape. The DOgs are ALL Square on the ends, the Shift Forks look like thay have the original plating on them and the Gears where the Forks ride look like new. The thing I did notice was that Kawasaki uses "3" Oil Holes for Oiling the Forks and the gears we had made by Robinson only had 1 oil Hole. SO when I sent the trans to him a asked for 2 more holes because I am not messing with success.
DM I think the title of the thread gives the impression that he was doing Clutchless Shifting when he is really ASKing about Clutchless shifting and used the Clutch himself right now and either is faster on pulling in the clutch than letting off the throttle or faster getting on the gas than letting out the clutch or the clutch is slipping between gears and catches itself!
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dougmeyer
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posted January 08, 2007 04:51 PM
Right Vince, That's what threw me.
Shane - quit using the clutch or maybe just use it on the 1-2 shift. Just preload the lever and unload the gearbox with the throttle. You'll eliminate your problems and ensure that you don't hurt the gearbox because it won't shift until it's unloaded and when it's unloaded it won't hurt itself......
Doug
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Shane661
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Posts: 11494
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posted January 08, 2007 04:56 PM
Edited By: Shane661 on 8 Jan 2007 16:59
Thanks for the advice!
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