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Old May 26th, 2014, 08:39 PM   #1
shane liberty
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TWF Racing Cartridges.

Ok so I pulled the trigger since no one else was willing to send their forks over to Zoran. I gave him my front end and I got back a set of GSXR cartridges with custom milled GSXR styled looking fork caps:





I'm spending my off season of racing touring with the CVMA Road Crew so I got my forks back just in time for the WERA West round at Autoclub Speedway. I'd never raced there and my last track day was 5 years ago on my speed triple. I didn't want to pay $250 for the track day before the race so I only got two 4 lap practice sessions before we started racing.

My left fork does compression now and my right does rebound.

I didn't get much practice but AP Moto was there to help me make any changes needed and after only a single turn to add some rebound, they worked great.

The forks worked phenomenally. I had fantastic feel, no excessive dive under braking and the front tire felt planted. I was even able to make mid-corner line corrections without feeling like the front was going to tuck.

I was able to grab a 1st and two 2nd place spots out of my 3 races. I got the bike down into the :49s with a best of 49.33 in the last race and had some great battles with the FLAP boys. If you're looking to upgrade your forks, TWF now has everything they need to give you turn key cartridges. Alternatively, you can contact AP Moto and Andy will be more than happy to set you up with some Andreani's for your ninja


Great day of racing and a great way to test out the new setup. I love my new forks. BIG Thanks to AP Motoarts for the race team support and help in the pits.

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Old May 26th, 2014, 09:31 PM   #2
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Nice! How much it set you back? You reused your old springs?
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Old May 27th, 2014, 06:10 AM   #3
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that is very cool, and very cool to have another option. the Andreani carts are like what $700 or so plus install? I would imagine the suzuki carts would be a reasonable option at say $500 installed or under.
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Old May 27th, 2014, 09:03 AM   #4
shane liberty
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I'm not 100% sure what he will be charging for the new product. I recommend giving him a call if you're seriously thinking about trying a set.

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Old May 27th, 2014, 09:38 AM   #5
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how does that compare to the racetech emulators?
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Old May 27th, 2014, 10:39 AM   #6
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Any links for those of us who want to read more about this?
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Old May 27th, 2014, 11:28 AM   #7
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FYI racetech emulators do just that, "emulate" the function of a cartridge fork. They do this by removing the damper rod ability to resist fluid flow through the compression orifices and then place shim with adjustable pretension over the hole in the top of the damper rod.

This allows the shim to be adjusted in the nature in which it allows fluid to flow through the tube during the stroke. The upside is cost, ability to retrofit to damper rod forks, somewhat separation of compression and rebound. Compression with shim, rebound with fluid through orifice still.

A true cartridge has shim stacks for both rebound and compression and you can then tune these shim stacks to behave in almost exactly the way that you want. In addition the adjusters are mounted externally to allow for quick adjustment (emulators must me removed and oil changed for rebound).

These take an existing cartridge and modify it for use in the ninjette housings. One leg compression one leg rebound since there no lower adjustment capability in the lower for leg outers.
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Old May 27th, 2014, 02:56 PM   #8
shane liberty
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Quote:
Originally Posted by cbinker View Post
how does that compare to the racetech emulators?
I had emulators and springs in the forks before. I played with geometry on the bike a little and tried to balance out the feel front to back considering I had a built JRi Shock in the rear. I have the bike sitting tall for more ground clearance.

Racing at Chuckwalla the front end was good and gave good feedback. The change to cartridges has been substantial though. The forks "feel" thicker or more solid. The front tire give me a lot more feedback. The front end feels more stable under trail braking and is rock solid when transitioning from upright to full lean. There is a hand-off between the suspension and the chassis when the bike goes to full lean and that transition can be a little unsettling when your suspension isn't dialed. You can ride around it no problem but the luxury of having no issue at all is very nice.

I am planning to race at Buttonwillow in a few weeks so I will keep you posted on how it does on a rough track.


For the cost cutting effect the Emulators are still a good choice. If you're already at the front of the pack in a race and tenths matter, I would consider going with the cartridges. If you're just cruising around town or you're practicing on a track day, they are not mandatory. Really it's just about finding any possible advantage when you're fighting for a 1st place, which I'm always trying for at CVMA or anywhere else I land.





P.S. I had my front forks showing only 8mm above the triple clamp and my rear has been raised a lot. I have ride height adjustment in the back so if you have a GSXR shock thing and run the cartridges you will have to figure out your geometry first before you can benefit from a better front end. Zoran has extended my forks +5mm now so I've slid my forks up to have 13mm showing, which I believe is the stock height. Keep in mind, though, the tail is higher. I will post up my geometry setup when I get the bike back if anyone wants to know the height of my rear. Let me know if anyone cares about such a thing and I will post it.
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Old May 27th, 2014, 03:08 PM   #9
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i'm curious to know your rear height
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Old May 27th, 2014, 03:12 PM   #10
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Quote:
Originally Posted by shane liberty View Post
I had emulators and springs in the forks before. I played with geometry on the bike a little and tried to balance out the feel front to back considering I had a built JRi Shock in the rear. I have the bike sitting tall for more ground clearance.

Racing at Chuckwalla the front end was good and gave good feedback. The change to cartridges has been substantial though. The forks "feel" thicker or more solid. The front tire give me a lot more feedback. The front end feels more stable under trail braking and is rock solid when transitioning from upright to full lean. There is a hand-off between the suspension and the chassis when the bike goes to full lean and that transition can be a little unsettling when your suspension isn't dialed. You can ride around it no problem but the luxury of having no issue at all is very nice.

I am planning to race at Buttonwillow in a few weeks so I will keep you posted on how it does on a rough track.


For the cost cutting effect the Emulators are still a good choice. If you're already at the front of the pack in a race and tenths matter, I would consider going with the cartridges. If you're just cruising around town or you're practicing on a track day, they are not mandatory. Really it's just about finding any possible advantage when you're fighting for a 1st place, which I'm always trying for at CVMA or anywhere else I land.





P.S. I had my front forks showing only 8mm above the triple clamp and my rear has been raised a lot. I have ride height adjustment in the back so if you have a GSXR shock thing and run the cartridges you will have to figure out your geometry first before you can benefit from a better front end. Zoran has extended my forks +5mm now so I've slid my forks up to have 13mm showing, which I believe is the stock height. Keep in mind, though, the tail is higher. I will post up my geometry setup when I get the bike back if anyone wants to know the height of my rear. Let me know if anyone cares about such a thing and I will post it.
I have the GSXR shock with the dogbones that @Rexbo made, so my ride height is stock all around right now. I would like to raise it a little, but not sure how to do the rear. But with the new springs(for my weight) maybe it will offer better ground clearance now.
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Old May 27th, 2014, 03:44 PM   #11
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Quote:
Originally Posted by cbinker View Post
I have the GSXR shock with the dogbones that @Rexbo made, so my ride height is stock all around right now. I would like to raise it a little, but not sure how to do the rear. But with the new springs(for my weight) maybe it will offer better ground clearance now.
mcmaster now sells high psi rod-end bearing turnbuckle kits. buy two and replace your plate dog bones with the adjustable turnbuckle linkage. viola
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Old May 27th, 2014, 05:20 PM   #12
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very cool, would be interested in knowing price. I am not in the market any time soon so I don't want to bother someone for the sake of my curiosity. someone buy some and let me know lol
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Old May 27th, 2014, 05:40 PM   #13
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Quote:
Originally Posted by alex.s View Post
mcmaster now sells high psi rod-end bearing turnbuckle kits. buy two and replace your plate dog bones with the adjustable turnbuckle linkage. viola
got a link?
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Old June 3rd, 2014, 03:12 PM   #14
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So what fork oil and weight are you running now with that setup? What's your air gap?

I know with Dean's cartridges he runs 2.5W (IIRC)
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