GT thunder XC link issue - Kawasaki KFX450 Forum :: KFX450HQ.com
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post #1 of 5 (permalink) Old 03-24-2019, 08:42 PM Thread Starter
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GT thunder XC link issue

So I got my GT thunder XC link installed with a race tech spring.

To start, GT says you need a spring 50 lbs heavier. I went with one 30 lbs heavier and with the preload all the way out I’m still at 7.5” ride height.

But that’s not an issue I’ll live with it.

The problem I’m having is with the rear lifted all the way up the spring is hitting the frame link.

I don’t know if the prm skid plate is preventing the linkage from rotating and that’s why it’s hitting?

Any thoughts?

08 KFX450r- DASA, FCI, Stage 2 Hotcams, Wiseco Programmer, Procom, Dynatek Coil, 6K HID, 7" LED Light Bar.

Race Tech dual rate front springs, GT thunder XC Link and Race tech spring

Poly Case Saver, Streamline Stabilizer, Full PRM Skidplates, Pro Armor Bumpers, Tusk Heel Guards, TRX Rear Hubs, IMS 3.7 tank
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post #2 of 5 (permalink) Old 03-27-2019, 07:01 PM Thread Starter
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Well I ended up cutting the shock linkage gaurd...and unfortunately that wasn’t the issue!

Apparently some kfx’s aren’t Built the same.
I found one of Dusters old threads and he had an 08 with that issue.

Talked to another guy and he also had the shock contact the tie rod link.

No issues it appears other than it hitting under full drop

08 KFX450r- DASA, FCI, Stage 2 Hotcams, Wiseco Programmer, Procom, Dynatek Coil, 6K HID, 7" LED Light Bar.

Race Tech dual rate front springs, GT thunder XC Link and Race tech spring

Poly Case Saver, Streamline Stabilizer, Full PRM Skidplates, Pro Armor Bumpers, Tusk Heel Guards, TRX Rear Hubs, IMS 3.7 tank
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post #3 of 5 (permalink) Old 03-28-2019, 03:44 AM
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Yea...I was going to mention to contact Duster about the linkage...I'm still using my stock linkage so I couldn't help you....

Here's a Duster reply on a thread on the GT linkage...Not sure if this is the one you also found... https://www.kfx450hq.com/forums/gene...t-thunder.html


(Quote)
Some linkages are just to lower the ride height...

Others are intended to provide a better progression ratio on the rear end...

So some just drop them down.

The others that change the progression ratio... well some folks will say it makes a bad shock work better... some will say it corrects a bad shock mounting choice... some will say it makes the rear work with a better shock... and in some cases it's just needed for a longer travel setup...



A good example would be that a Honda 400EX needs a link... for many reasons...
To lower the thing down...
To correct the fact the top shock mount is too low...
To correct the fact that the swingarm angle is too steep standard...
To allow easier reworking of the stock shock for a combo that works much better...

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post #4 of 5 (permalink) Old 03-28-2019, 09:08 AM Thread Starter
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Thanks DD.

Any issues from removing the upper collar on the shock as well? I want to lower ride height a little more.

It’s weird how some kfx’s have this issue. I might notch the tie rod a little.

Here is the thread from duster

https://www.kfx450hq.com/forums/susp...#/topics/18498

08 KFX450r- DASA, FCI, Stage 2 Hotcams, Wiseco Programmer, Procom, Dynatek Coil, 6K HID, 7" LED Light Bar.

Race Tech dual rate front springs, GT thunder XC Link and Race tech spring

Poly Case Saver, Streamline Stabilizer, Full PRM Skidplates, Pro Armor Bumpers, Tusk Heel Guards, TRX Rear Hubs, IMS 3.7 tank
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post #5 of 5 (permalink) Old 04-15-2019, 01:44 AM
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You should try a lighter spring for sure.

Also try rotating the spring for best clearacne and turn the opening of the keeper to the front.

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