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Discussion Starter #1
It's worth checkin me on this... but I believe both Pirelli and Metz offer race compounds in 120/65's if you want to keep the stock sizing.

"Keep yer feet on the pegs and your right hand cranked."
 

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I checked and I didn't see the Rennsport Race or Supercorsa Race in 120/65. Just wondering which way to go. I'm sure the 120/70 would be stable but also a taller tire. The 120/60 might make the bike too twitchy. I'm going to burn up the stock Bridgestones at the track and then replace them. I was hoping someone had tried race tires on their 636. Thanks.
 

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I have a '03 636 for track duty only. I'm going to change the stock tires to race tires. The stock front is a 120/65. Race tires only come in 120/60 or 120/70 sizes. Has anyone used either and do you have a preference and why? Thanks!:D
 

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You'll get a little more feel mid-corner out of the /70 section tire, this is based on my own experiences.

Chaos, panic, disorder......

my work here is done
 

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The DOT race tires from Dunlop and Pirelli/Metzeler come in the 120/70 size only. Michelin does make their H2 compound in 120/60 but their "real" DOT race tires, the S2 and M2, come in 120/70 only.

You do realize that you can lower or raise the front or rear of the bike to adjust for tire height differences, don't you??

Scott
 

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Assuming identical construction and rubber compounds, the 120x17 front tire with the shortest profile will turn in the quickest and offer the most feel. And that will be true even if you adjust the front ride height of the bike to so it is consistent from tire to tire. Also, the shortest profile tire will likely have the smallest contact patch while leaned over.

Why? The shorter the profile the stiffer the sidewall. The tire with the shortest profile will have the stiffest sidewall and deflect the least when a turn is initiated. This means the bike will respond quicker to steering input. Since the stiffer sidewall deforms less, the contact patch will be smaller when leaned over too.

The whole idea behind the 16.5" tires, which are as tall as 17" tires, is to get a taller sidewall so the sidewall deforms more and the contact patch can be larger. The larger contact patch offers more ultimate grip. A 16.5" tire handles bumps a bit better when leaned over as compared to a 17" tire.

This the idea behind the Dunlop 120/75R17 slick as well.

If you want the front tire that offers the most grip, get the 120/70R17.

Scott
 

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Scott,

Thanks for the review. I know how to change the ride height front and rear, and I was leaning towards the 120/70, but I just wanted to see if anyone had tried both (on the ZX636 or ZX6RR)and had an opinion. The Yamaha R6 is the only one with a 120/60 front tire. The CBR and Gixxer both have a 120/70. I recently had a Gixxer 600 track bike with the 120/70, and have been riding a 999S with the 120/70 front also. I have never ridden a 120/60 front. I know it would steer alot quicker but might be unstable on the ZX6R. I have run Dunlops, Rennsports, and Pilot Race tires at the track before, but never the 'Stones. I'll probably get the H2's for general trackdays and the S2 front/M2 rear combination for the really fast stuff.

BTW, what mods do yo have on your ZX6RR? I have seen some of your, well, uh, what shall we call them,.........debates?...on the OTHER boards and forums. I know most of the "members" in the Florida region. Hint, Hint. ;)

The Guy in the Brown Truck is bringing me some goodies in the next few days. Akropovic Race exhaust, PCIIIusb, Scott's damper, PP rearsets, Ohlins rear shock, Galfer lines, and CRG brake levers. I'm going to ship the front forks off to Traxxion for re-valving work. Then in a few months I'll get race bodywork. This bike is gonna be one hell of a track machine. Can't wait to get it done.

Can I have your slipper clutch?

Jeff
 

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Here is what I have on my ZX-6RR:

Sharkskinz race bodywork
Sato Full Ti exhaust system
Power Commander IIIUSB with custom map
Sato adjustable clip-ons
Sato adjustable rear sets
Ohlins 120mm steering damper (frame mounted)
Penske triple adjustable shock
Ohlins fork Internals

Scott
 

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Discussion Starter #9
You two are BOTH makin' me drool with the mods you've got on the go ! :(

"Keep yer feet on the pegs and your right hand cranked."
 

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Did someone say MODS?!??!!

Installed:
Öhlins PRXS46 Rear Shock
Scotts steering dampener
Intuitive Frame Sliders
Fabri Racing double bubble windscreen
..and a few titanium bolts here and there

On the way:
Arata Full-Ti System
Arata rearsets
Öhlins fork internals w/ Traxxion Dynamics valving
Flexi-Glass bodywork (SharkSkinz copies hehe)
Yoshimura EMS (I'll wait for it, screw the Powercommander)


Chaos, panic, disorder......

my work here is done
 

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Oh, I also have:

Vesrah RJL brakes (awesome pads than you Mark Junge)
Galfer Superbike brake lines
Dunlop D208GP tires
TCM lightened rear brake rotor
MyChron Light lap timer
DID 520ERV2 chain
AFAM sprockets
Castrol SRF brake fluid
Amsoil 10w-40 motorcycle oil

Soon to come:

CRG brake and clutch levers
Decked head and cylinders
Kaweasaki Kit cams, valve springs, and gaskets
Kawasaki Kit ECU

Scott
 

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Scott,

What is the cost of each of these items? Or it is a package deal?

CRG brake and clutch levers
Decked head and cylinders
Kaweasaki Kit cams, valve springs, and gaskets
Kawasaki Kit ECU

Thanks,

Duke



Longest distance between two curves...straight line.
 

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Originally posted by Rob Lee

Scott,

How does the Vesrah pad compare to the Performance Friction 95 compound pad?
The Vesrah pads I am using now are what will become the RJL pad for the 4-pad Tokico radial-mount calipers. They have a softer initial bite than the stock pads but not as soft as the PF 95 pads I have used on my other race bikes.

When PF pads become available for the 4-pad Tokico radial-mount calipers, they will be the PF 99 compound. That compound has more initial bite than the 95 compound. From what I understand, Hayden and Meiring tested the 95 compound and thought it was too soft. This may have to do with the 280mm rotor size on the ZX-6RR and ZX-6R. When the PF 99 compound pads become available, I will probably test a set out.

In the mean time, Vesrah has the Super RJL pad coming out later this month for the 4-pad Tokico radial-mount calipers. These pads are supposed to be much better than the standard RJL pad I am running now. I fear that these pads will have too strong initial bite. I will get a set of those to test and then decide what pads I will run from then on.

Scott
 

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I've used both the metz/pirelli's and the 001 'stones. I really like the Bridgestones, but think they may wear a little quicker.
 

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Thanks for the input. I just went witht the trusted old standard, Michelin Pilot Race H2's. Great grip and they can last anywhere from 3-5 full trackdays. I got a 120/70 for the front. I'll let you know how they work in a few weeks. Later.:D
 

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Oh yeah, btw, Scott (Winders), you went with Ohlins fork internals, but did you change the stock springs? What are the stock springs? 9.0 or 9.5? I contacted Traxxion and they wanted to re-valve compression, re-valve rebound, change the springs, change the oil, and rebuild the forks. It was expensive! I didn't know whether or not I had to do all that with the stock forks. Where they that bad to start? How are your forks now? Thanks.
 

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I changed to .95 kg/mm springs. Dan Kyle did all that Traxxion wants to do plus some more. The forks had too much compression damping to start with. Now they work great.

Scott
 
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