CRF Lower Fork Tube Diameter?

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2/6/2019 11:57 AM

I want to put an O-ring on my lower fork tube to gauge travel. What’s the diameter on the newer 49mm forks the late model CRFs come with?

Yes, I’m aware that a zip tie will work but I want to use an O-ring. Thanks, guys.

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'21 KX250
'20 KTM SX-E5
'21 Husky EE-5
(2) STACYC 16eDrives

2/6/2019 12:48 PM

You answered your own question. 49mm

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2/6/2019 1:10 PM

Doh...Thought that was the clamping surface diameter.

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'21 KX250
'20 KTM SX-E5
'21 Husky EE-5
(2) STACYC 16eDrives

2/6/2019 1:32 PM

Nahh i had the same confusion once upon a time. If you get a set of calipers and measure the outer tube, its like 10-12mm bigger than inner tube depending on position (upper and lower clamp area) on the outer tube.

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2/6/2019 3:44 PM

Thanks. Appreciate the replies.

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'21 KX250
'20 KTM SX-E5
'21 Husky EE-5
(2) STACYC 16eDrives

2/6/2019 6:57 PM

use and old shock piston band o ring..50mm

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IG @jaredkeller96

2/7/2019 4:52 AM

People really use zipties for it? Damn...

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2/7/2019 7:30 AM

Turbojez wrote:

People really use zipties for it? Damn...

I have seen it even on coated lowers, both on Mx and trackday roadracers..sick

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2/7/2019 11:42 AM

Turbojez wrote:

People really use zipties for it? Damn...

Kawasaki-rider wrote:

I have seen it even on coated lowers, both on Mx and trackday roadracers..sick

I personally use an o-ring, but it's not like the zip tie slides up and down. It only gets pushed down one time. Even if you go deeper into the stroke on the next hit it just gets pushed down a little further. No harm.

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Take it to the limit, one more time!