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Author Topic: Forks  (Read 45736 times)

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Offline sandblaster

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Re: Forks
« Reply #60 on: June 19, 2015, 05:03:13 AM »
Munching popcorn...  :-o
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline edgar_kx3

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Re: Forks
« Reply #61 on: June 20, 2015, 02:24:20 AM »
2014 kx250f came factory with 22.5 offset triples. Im thinking I will try the 250f forks would like to stay KYB but can get some 2008 250f forks cheap.
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Offline Captainc

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Re: Forks
« Reply #62 on: July 13, 2015, 06:07:31 AM »
Quote from: edgar_kx3 on June 20, 2015, 02:24:20 AM
2014 kx250f came factory with 22.5 offset triples. Im thinking I will try the 250f forks would like to stay KYB but can get some 2008 250f forks cheap.

Hi, I'm a total newbie here and have just bought a basically new 1989 500. What did you guys find was the easiest way of upgrading the forks. I see some are saying 2008 kxf450 some are saying 2013 kxf250. Can you help
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Motorrad

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Re: Forks
« Reply #63 on: July 18, 2015, 04:43:30 PM »
Did some axle offset measuring tonight... Found my handling issue.   Will update with numbers and the fix tomorrow
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Motorrad

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Re: Forks
« Reply #64 on: July 18, 2015, 05:10:03 PM »
Quote from: Captainc on July 13, 2015, 06:07:31 AM
Quote from: edgar_kx3 on June 20, 2015, 02:24:20 AM
2014 kx250f came factory with 22.5 offset triples. Im thinking I will try the 250f forks would like to stay KYB but can get some 2008 250f forks cheap.

Hi, I'm a total newbie here and have just bought a basically new 1989 500. What did you guys find was the easiest way of upgrading the forks. I see some are saying 2008 kxf450 some are saying 2013 kxf250. Can you help

89 conventional leg forks are awesome.  I'd spring em and set them up for your weight and run them...   Loved the 89 forks I ran on my 87.   
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Motorrad

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Re: Forks
« Reply #65 on: July 19, 2015, 05:43:38 AM »
The fix..  And my bike should be faster since my wallet is lighter now

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Offline Enginerd

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Re: Forks
« Reply #66 on: July 19, 2015, 05:52:00 AM »
Quote from: Motorrad on July 18, 2015, 05:10:03 PM
89 conventional leg forks are awesome.  I'd spring em and set them up for your weight and run them...   Loved the 89 forks I ran on my 87.   
I have a set of these. I've been on the fence about trying them on my 95. Maybe I should give them a try.
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Motorrad

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Re: Forks
« Reply #67 on: July 19, 2015, 06:03:13 AM »
Okay. Blue leg fork
Leg bottom= 43mm
Bottom to axle outer= 40.79mm
Axle diam= 21.91mm
Axle offset= (40.79-(43/2))+(21.91/2)
                   = 30.245mm


2008 kx450 fork
Leg bottom= 33mm
Leg to axle outer= 37.33mm
Axle diam= 24.88mm
Axle offset= (37.33-(33/2))+(24.88/2)
                   =33.27mm

So
Kx500 total offset= 30.245mm +22mm
                                = 52.245mm
Kx450 total offset= 33.27mm + 24.5mm
                                = 57.77mm

Difference of positive 5.525mm of offset change...

Yikes!

The fix.......
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Offline KXDINO

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Re: Forks
« Reply #68 on: July 19, 2015, 06:26:58 AM »
2015 450 f forks
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Motorrad

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Re: Forks
« Reply #69 on: July 19, 2015, 08:39:36 AM »
Quote from: KXDINO on July 19, 2015, 06:26:58 AM
2015 450 f forks

I would still have the same issue.... F-ed up geometry

  And not sure how I feel about the new fork technology yet.   Heck I still call upside down ones new fangled witch craft....


Here is my fix

Puts all my geometry back to stock...   I'm in the process of pressing out my custom steering stem and pressing it into the new clamps...



« Last Edit: July 19, 2015, 08:57:19 AM by Motorrad »
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Motorrad

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Re: Forks
« Reply #70 on: July 19, 2015, 01:45:00 PM »
Next issue... Fork length......

To be continued....
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Offline sandblaster

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Re: Forks
« Reply #71 on: July 19, 2015, 03:23:36 PM »
Quote from: Motorrad on July 19, 2015, 06:03:13 AM
Okay. Blue leg fork
Leg bottom= 43mm
Bottom to axle outer= 40.79mm
Axle diam= 21.91mm
Axle offset= (40.79-(43/2))+(21.91/2)
                   = 30.245mm


2008 kx450 fork
Leg bottom= 33mm
Leg to axle outer= 37.33mm
Axle diam= 24.88mm
Axle offset= (37.33-(33/2))+(24.88/2)
                   =33.27mm

So
Kx500 total offset= 30.245mm +22mm
                                = 52.245mm
Kx450 total offset= 33.27mm + 24.5mm
                                = 57.77mm

Difference of positive 5.525mm of offset change...

Yikes!

The fix.......


Hey... You told me you didn't do millimeters....  :-P
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Motorrad

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Re: Forks
« Reply #72 on: July 19, 2015, 03:50:29 PM »
Quote from: sandblaster on July 19, 2015, 03:23:36 PM
Quote from: Motorrad on July 19, 2015, 06:03:13 AM
Okay. Blue leg fork
Leg bottom= 43mm
Bottom to axle outer= 40.79mm
Axle diam= 21.91mm
Axle offset= (40.79-(43/2))+(21.91/2)
                   = 30.245mm


2008 kx450 fork
Leg bottom= 33mm
Leg to axle outer= 37.33mm
Axle diam= 24.88mm
Axle offset= (37.33-(33/2))+(24.88/2)
                   =33.27mm

So
Kx500 total offset= 30.245mm +22mm
                                = 52.245mm
Kx450 total offset= 33.27mm + 24.5mm
                                = 57.77mm

Difference of positive 5.525mm of offset change...

Yikes!

The fix.......


Hey... You told me you didn't do millimeters....  :-P

Your right...   Unlike the peanut gallery..... My wife likes INCHES
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Offline KXDINO

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Re: Forks
« Reply #73 on: July 19, 2015, 07:31:02 PM »
I rode my k5 std with the 15 forks it handled and turned better than the std forks.
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Motorrad

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Re: Forks
« Reply #74 on: July 20, 2015, 01:50:07 AM »
Quote from: KXDINO on July 19, 2015, 07:31:02 PM
I rode my k5 std with the 15 forks it handled and turned better than the std forks.

Very interesting.   did you just slap them on?  use the 2015 triple clamps?  have you measured your trail numbers before and after?
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