Learning2race
Expert Class
Posts: 138
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posted July 05, 2010 10:39 AM
transmission undercutting
Looking for references for reputable companies who perform undercutting of transmission gears. The only place I know of is FastbyGast. If possible, a West coast location would be preferable for shipping purposes, but my primary interest is quality of work.
Thanks
  
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mathews
Expert Class
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posted July 05, 2010 11:47 AM
R & D transmissions
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smokinZX14
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posted July 05, 2010 12:30 PM
MRE .. Ask for my buddy Timmy ..
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Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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06redzx14
Pro
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posted July 05, 2010 01:55 PM
adams has them in stock not sure who cuts them though
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Learning2race
Expert Class
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posted July 05, 2010 02:09 PM
Thanks
Where are MRE and R&D located? Any chance of a contact phone number#
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Compton
Zone Head
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posted July 05, 2010 03:16 PM
MRE and R&D are both in florida.
only west coast one that i can think of off the top of my head is APE, which i doubt they even do in house.
http://aperaceparts.com/transmissions.html
I personally will never use APE again for anything, after they botched one of my orders up bad.
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b.w.
zx14, little longer, little louder, little lower.
08 Busa, just a little longer and louder and lower than the 14
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eklipse636
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posted July 05, 2010 04:34 PM
quote:
MRE .. Ask for my buddy Timmy ..
+1 Tim is a good, honest guy. He comes up to our track 3 or 4 times a year. He's a nut!
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Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
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smokinZX14
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posted July 05, 2010 06:08 PM
 Edited By: smokinZX14 on 6 Jul 2010 02:09
Murdoch Racing Enterprises
935 Harbor Lake Court, Safety Harbor, FL 34695
Tech/Info: (727)791-1321 - Parts & Orders: (800)237-RACE
Fax: (727)791-9552
Call and ask for Timmy .. Tell him Lee told you to call ...
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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01smokes
Needs a job
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posted July 05, 2010 11:08 PM
about what is the goin rate for a trans under cutting
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Compton
Zone Head
Posts: 969
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posted July 06, 2010 03:08 AM
quote:
about what is the goin rate for a trans under cutting
depends on how much you want done, and how good or bad of the shape the transmission is in. but around 300 is a good ballpark to start with.
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b.w.
zx14, little longer, little louder, little lower.
08 Busa, just a little longer and louder and lower than the 14
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Swiftkart
Expert Class
Posts: 349
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posted July 06, 2010 04:04 AM
What are the advantages of having this done to a zx14?
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2006 ZX14, Brock CT-Meg, PC, ignition module, E85, 214 lbs suited, 8.96@152.32 1.46 60'
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smokinZX14
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posted July 06, 2010 04:44 AM
Edited By: smokinZX14 on 6 Jul 2010 12:45
quote:
What are the advantages of having this done to a zx14?
None that i can think of ...
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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dubious
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posted July 06, 2010 04:44 AM
at about 300 hp the trans will want to jump out of gear
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natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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SteddyTeddy
Pro
Posts: 1664
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posted July 06, 2010 05:17 AM
It does make it a bit harder to find neutral.
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Big_T112
Pro
Posts: 1061
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posted July 06, 2010 06:03 AM
R&D did the zx14 trans for $865 dollars. under boost or when we had spray on it you could not get it to shift into 4th without a lot of kill time. under boost at 390 hp it would not shift at all with the airshifter. I think a simple street strip type back cutting is around $350 dollars. Most modern bikes have the first few gears back cut from the factory. It fixed the problem and it shifted like butter.
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RACNRAY
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posted July 06, 2010 06:47 AM
quote:
It does make it a bit harder to find neutral.
I have been undercutting trasmissions since about 1985 and have never had any complaints of shifting, in or out of gear or into neutral. There can be other factors that cause difficulty but undercutting is not one of them,
Most modern day sportbikes come from the factory with undercut tranny's, typically 3rd thru top gear is cut . Matter of fact we just did a 1992 ZX-11 tranny and that is what Kawi did, 3rd thru 6th. On constant mesh tranny's the gear that gets the most punishment in terms of hard acceleration and getting into gear is second gear, thus the propensity for 2nd gear failure. I think it is funny that i visit forums of various makes of skoots and see peeps referring to the failure of second gear on that particular forums focus skoot, claiming it is a common problem,yet it is all skoots that have this possibility.
When i did the first engine upgrade on my Busa at 5000 miles, i pulled apart the entire engine. I examined the tranny, saw the less than optimum mass-production method of undercutting Suzuki did on 3rd thru 6th, did my touch up on those gears, did the undercut on 2nd. The skoot now has 70,000 miles on it and the engagement dogs look almost like they did 65,000 miles ago. Oh, and this things shift like a hot knife thru butter and snicks into neutral every time with no probs.
RACNRAY
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no chicken strips on this south florida boy's skoots!!
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dubious
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posted July 06, 2010 07:46 AM
interesting.
I had noted my zx14 looked like it had a very mild maybe 3-5 degree back cut from Kawi and I was basicaly told i was full of shit or seeing things.
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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RACNRAY
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posted July 06, 2010 07:57 AM
quote:
interesting.
I had noted my zx14 looked like it had a very mild maybe 3-5 degree back cut from Kawi and I was basicaly told i was full of shit or seeing things.
If i recall the first time i saw factory undercutting was on the 1980 GS1100 Zooks. 4th and 5th were factory undercut, so all we had to do was 2nd and 3rd.
When i cut gears that have factory undercutting it matches the 5 degree carbides i use.
So as far as what you saw, you are correct.
Now as far as the accusations, are your eyes brown...do you see dead people!??? 
LOL
RACNRAY
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no chicken strips on this south florida boy's skoots!!
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SteddyTeddy
Pro
Posts: 1664
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posted July 06, 2010 08:23 AM
When stopped and in first gear, because of a normal slight clutch drag, it takes more effort to put the bike in neutral. All other gears shift like butter. Tim and MRE did mine.
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zx-14lvr
Expert Class
Posts: 121
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posted July 06, 2010 02:42 PM
somebody explain to me what this is and does please 
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RACNRAY
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FAST OLD GUY
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posted July 06, 2010 03:02 PM
quote:
somebody explain to me what this is and does please
Motorcycles use what are called "constant-mesh" tranny's. All the gears sets are constantly engaged tooth to tooth. Some gears are free-floating on their shafts and some are splined to their shafts. On the sides of the gears are protrusions called "dogs" and on the adjacent gear are either matching dogs or female slots. To engage any gear requires a gear to be slid over to engage it's neihboring gear. The load carrying contact surfaces of these dogs and/or slots are usually machined at 90 degrees to the gear base. In high power applications or when a gear is worn undercutting is performed. This is where those load bearing contact surfaces have an angle cut into them, usually a matching 5 degrees on each surface. This causes those gears to somewhat "lock" together under load, minimizing the gears jumping out of engagement.
The japs have been undercutting gears on their hi-performance skoots for years, in an effort to minimize missed shifts,gears jumping out of engagement, etc.
This is a quicky explanation as i saw this just before i heading home.
HOPE THIS HELPS
RACNRAY
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no chicken strips on this south florida boy's skoots!!
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zx-14lvr
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posted July 06, 2010 03:46 PM
sweet..thanks. its always good when somebody will actually type it out or copy some info that they know is good instead of making smart ass comments telling them to search it or some b/s. thank you
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CraigChrist
Pro
BAWLS
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posted July 07, 2010 02:57 AM
that being said... take the information that he just gave you, stick it in your ass, and quit complaining about everyone being mean to you.
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60ft-------1.42
1/8th------5.97
mph-------119
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Learning2race
Expert Class
Posts: 138
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posted July 07, 2010 11:36 AM
Ahhh feel the love!
My interest is driven by the thought that I MAY have a bent shift fork. When using the airshifter I have intemittant shifting between 1-2 (occationally it will upshift for a fraction of a second then get spit back into neutral) I've adjusted the air ram to have the maximum lift on the shift so I do not believe this to be an issue.
When I footshift, this doesn't happen - possibly because I am holding pressure on the shift lever for a longer period thereby allowing the gears to mesh.
If I am going to open the entire engine to get at the shift fork, I am thinking of having the gears undercut with the hope that the 1-2 shift becomes more exact - there is a long throw to get 2nd going through neutral. May or may not be of benefit, but for a couple hundred dollars I'm thinking of trying it.
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smokinZX14
Needs a life
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posted July 07, 2010 12:08 PM
Edited By: smokinZX14 on 7 Jul 2010 20:38
quote:
Ahhh feel the love!
My interest is driven by the thought that I MAY have a bent shift fork. When using the airshifter I have intemittant shifting between 1-2 (occationally it will upshift for a fraction of a second then get spit back into neutral) I've adjusted the air ram to have the maximum lift on the shift so I do not believe this to be an issue.
When I footshift, this doesn't happen - possibly because I am holding pressure on the shift lever for a longer period thereby allowing the gears to mesh.
If I am going to open the entire engine to get at the shift fork, I am thinking of having the gears undercut with the hope that the 1-2 shift becomes more exact - there is a long throw to get 2nd going through neutral. May or may not be of benefit, but for a couple hundred dollars I'm thinking of trying it.
Remove the neutral finder and that may well fix the problem .. I know on the SS bikes they remove it and makes it easier to do the one two shift ..If you have no problem with foot shifting it the problem has to be with the air shifter .. Ram binding , wrong mounting location, wrong kill time , to low psi ..Ect .. I don't think you will find a problem with the shift forks or gears when you take it apart .. If it were me i'd look at the air shifter again .. I would also call Coby Adams or Chris Jones , they may be of some help because of the high HP they run ..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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