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Thread: Rear tire as far forward as possible?

Created on: 07/11/16 07:01 PM

Replies: 19

Fantastic


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Joined: 04/25/16

Posts: 84

Rear tire as far forward as possible?
07/11/16 7:01 PM

Has anyone done this? Are there any issues I should expect or will it be as simple as every other bike I have done this to?

Before you ask I want the shortest wheelbase possible for the track. Also those sweet wheelies will be easier ;)



190/55 is overrated. 200/55 is where it is at.

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Auron


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Joined: 01/25/12

Posts: 574

RE: Rear tire as far forward as possible?
07/11/16 7:19 PM

Will +1 on the rear fit on the stock chain? That would be the easiest, i'd think about doing that.

i'd also wonder if it effect chain adjustment at all

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Fantastic


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Joined: 04/25/16

Posts: 84

RE: Rear tire as far forward as possible?
07/11/16 7:34 PM

+1 rear sprocket might move the axle forward but at the cost of putting even more torque to the pavement. The comment about making wheelies easier was sarcastic btw.



190/55 is overrated. 200/55 is where it is at.

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Rook


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Joined: 03/28/09

Posts: 20814

RE: Rear tire as far forward as possible?
07/11/16 7:46 PM

Before you ask I want the shortest wheelbase possible for the track.

MassZX-14 used a dremel grinder on his axle slots to move his axle forward an eight inch or so to make his Gen1 a bit more track ready. No problems but I'm sure he was not able to use a 200/55 tire.



08 MIDNIGHT SAPPHIRE BLUE ZX-14 Now Deceased, will be resurected 2024 ZX-14R bran friggin NEW!

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VicThing


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Joined: 07/17/14

Posts: 2398

RE: Rear tire as far forward as possible?
07/11/16 7:47 PM

Darkarcher recently wanted to get the most wheelbase. Removing 1 link will move your tire up ~2 notches.

When I replace my chain I'll most likely do this.

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Fantastic


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Joined: 04/25/16

Posts: 84

RE: Rear tire as far forward as possible?
07/11/16 9:37 PM

Forgot to consider the added height of the 200/55. Will need to do a few tests with it tomorrow to confirm it fits that far forward.



190/55 is overrated. 200/55 is where it is at.

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Auron


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Posts: 574

RE: Rear tire as far forward as possible?
07/11/16 10:24 PM

@Fantastic, would +1 on the back fit the stock chain?


* Last updated by: Auron on 7/11/2016 @ 10:24 PM *

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Rook


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RE: Rear tire as far forward as possible?
07/12/16 7:16 AM

Forgot to consider the added height of the 200/55. Will need to do a few tests with it tomorrow to confirm it fits that far forward.

The gen1 swing arm will accept a 200/55 just barely with the axle at about 2 and a half adjuster marks. I think this photo looks like there is a little more space than there is in real life. I Have not measured.



08 MIDNIGHT SAPPHIRE BLUE ZX-14 Now Deceased, will be resurected 2024 ZX-14R bran friggin NEW!

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Rook


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RE: Rear tire as far forward as possible?
07/12/16 7:26 AM

@Fantastic, would +1 on the back fit the stock chain?

I'm sure it would. With a little chain stretch, I bet you'd get +2 or even +3. I went with +4 on my Gen1 and I think I insatalled a chain a couple links longer than stock to end up at stock WB. Would have to count pins.



08 MIDNIGHT SAPPHIRE BLUE ZX-14 Now Deceased, will be resurected 2024 ZX-14R bran friggin NEW!

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Auron


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Posts: 574

RE: Rear tire as far forward as possible?
07/12/16 10:05 AM

Sweet, I'll put a 43 tooth on before I even ride my new bike so it can all wear together. How would I be messing with Kawasaki's base setting there?


* Last updated by: Auron on 7/12/2016 @ 10:05 AM *

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Rook


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Posts: 20814

RE: Rear tire as far forward as possible?
07/12/16 12:33 PM

Get more opinions. You may need to have some more chain stretch if the bike is new. I know this topic has come up in threads before.

How would I be messing with Kawasaki's base setting there?

For speed sensor? Not sure. Also will probably reduce top speed. Notsure about ABS and TC either.



08 MIDNIGHT SAPPHIRE BLUE ZX-14 Now Deceased, will be resurected 2024 ZX-14R bran friggin NEW!

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mokaw


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Location: Bismarck, ND

Joined: 02/15/09

Posts: 213

RE: Rear tire as far forward as possible?
07/12/16 12:54 PM

Rook, I see you have a slick on your bike. Careful with the clearance. I had one on my 06 14. I took it to the dragstrip and it would not pull at all on top. I was running 9.9's - 10.2's. I found out the slick was ballooning at higher speeds and rubbing on the front of the swingarm. I put a longer chain on the bike which gave the tire all kinds of clearance and I ran 9.20's. Big difference, but dumb on my part for not thinking of this before. The difference here, though, is that you have the rounded slick and I don't think they balloon up, at least not much. I had the flat slick which grows considerably while going down the track.

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Rook


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RE: Rear tire as far forward as possible?
07/12/16 10:21 PM

Wow! Never thought of that. I'd be surprized if the tire could grow an eighth inch but you never know. Heat and centrifugal force might do it. I'll have to keep an eye on the swingarm. Thanks.

Maybe that's why 1bad wanted to race me.



08 MIDNIGHT SAPPHIRE BLUE ZX-14 Now Deceased, will be resurected 2024 ZX-14R bran friggin NEW!

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darkarcher


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Cincinnati, Ohio USA

Joined: 01/15/14

Posts: 274

RE: Rear tire as far forward as possible?
07/13/16 2:12 PM

From my testing height is where its at if you want turn in. Got to jack up that rear or drop the front. Just a quarter inch makes a big difference. Takes it from a turd to a liter bike. Want a twitchy 600? go another quarter. That lightweight galfer seems to help as well on the rear.



2020 on the way!!!!!!

2015 ZX14R ABS - Brocks CT Single Quiet Kore, PCV, Brocks/Guhl ECU Flash 2 (plus cooling fan mod), Brocks clutch mod (smokin street), HyperPro RSC,PIAA 65W Bulbs, schnitz fender eleminator,5/8" Drop, Pro Grips 719, Billet adjustable kick stand,17/41 gears, superbrightles.com,EK 3D, Aluminum chain guard, etc, etc

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Rook


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RE: Rear tire as far forward as possible?
07/13/16 4:44 PM

Want a twitchy 600? go another quarter.

Might be adjusting the Ohlins shock up to max height soon. Really though, I think the tire alone is as much as I can use. ...but no reason not to try it all!



08 MIDNIGHT SAPPHIRE BLUE ZX-14 Now Deceased, will be resurected 2024 ZX-14R bran friggin NEW!

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Auron


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Posts: 574

RE: Rear tire as far forward as possible?
07/13/16 5:24 PM

Any word on going +1 on the rear with a new bike?

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darkarcher


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Cincinnati, Ohio USA

Joined: 01/15/14

Posts: 274

RE: Rear tire as far forward as possible?
07/14/16 7:43 AM

I think you would have the stutter if you went +1 unless you send the ECU to Guhl for a fix. Approved gearings I have heard of for non studder are down on the rear any amount, 16/63, and 17/45. Maybe others know of more. So go up two if you need to go up. If you want to know how far forward its going to move you it will not be much if anything. One tooth is 2/10th of an inch sprocket diameter to be exact. So less than a quarter inch forward for sure.


* Last updated by: darkarcher on 7/14/2016 @ 7:44 AM *



2020 on the way!!!!!!

2015 ZX14R ABS - Brocks CT Single Quiet Kore, PCV, Brocks/Guhl ECU Flash 2 (plus cooling fan mod), Brocks clutch mod (smokin street), HyperPro RSC,PIAA 65W Bulbs, schnitz fender eleminator,5/8" Drop, Pro Grips 719, Billet adjustable kick stand,17/41 gears, superbrightles.com,EK 3D, Aluminum chain guard, etc, etc

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Auron


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Joined: 01/25/12

Posts: 574

RE: Rear tire as far forward as possible?
07/14/16 11:28 AM

I plan on having Ivan flash it for me, but sounds like I won't be able to have fully functional TC and change the gearing no matter what, right?

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Fantastic


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Joined: 04/25/16

Posts: 84

RE: Rear tire as far forward as possible?
07/14/16 7:12 PM

Doing some research and talking to more than one track suspension guru they all said decreasing the wheelbase would increase the swingarm angle. Increasing the swingarm angle makes the rear tire loose grip because the weight shifts forward and that makes a spinning rear tire much more likely. I know all about spinning tires on exit so I am going to not add to that and make it possible anywhere else.


* Last updated by: Fantastic on 7/14/2016 @ 7:13 PM *



190/55 is overrated. 200/55 is where it is at.

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darkarcher


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Location:

Cincinnati, Ohio USA

Joined: 01/15/14

Posts: 274

RE: Rear tire as far forward as possible?
07/15/16 5:51 AM

agree with fantastic unless you lowered the bike also which would actually increase the lbs per square inch on the tire. Lowering is the wrong word because if you notice the swingarm runs downhill so by "lowering" you are bringing it back to stock height. Either way these are not big differences.

Auron, I dont see any reason why your TC would not work normally. Why do you think that?



2020 on the way!!!!!!

2015 ZX14R ABS - Brocks CT Single Quiet Kore, PCV, Brocks/Guhl ECU Flash 2 (plus cooling fan mod), Brocks clutch mod (smokin street), HyperPro RSC,PIAA 65W Bulbs, schnitz fender eleminator,5/8" Drop, Pro Grips 719, Billet adjustable kick stand,17/41 gears, superbrightles.com,EK 3D, Aluminum chain guard, etc, etc

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