Fork Oil Questions - Wrist Twisters
 
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post #1 of 2 Old 11-26-2015, 09:38 AM Thread Starter
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Fork Oil Questions

Stock fork on a 02 919. I want to change the fluid & did some searching here & got confused. The FSM calls out a height of 155mm of Honda SS-8 measured without the springs.

A lot of references here to 125mm--why so much more than the FSM? Is the 125mm with or without springs?

I saw some references to a low cost Traxxion Dynamics "kit" but can't find anything on their web page. Where can I find info?

I'm not interested in an any high dollar mod as I am just a basic rider & this is a 13 year old basic bike but would be open to any easy or low cost improvements while I'm in there. Really my only complaint from stock is it bottoms HARD on railroad tracks, bottoms on other big bumps, & some decent brake dive. I am down to about 175 lb in street clothes & have a 04 stock shock. The 02 shock was a catapult.

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post #2 of 2 Old 11-27-2015, 10:36 AM
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Quote:
Originally Posted by Bryce919er View Post
Stock fork on a 02 919. I want to change the fluid & did some searching here & got confused. The FSM calls out a height of 155mm of Honda SS-8 measured without the springs.

A lot of references here to 125mm--why so much more than the FSM? Is the 125mm with or without springs?

I saw some references to a low cost Traxxion Dynamics "kit" but can't find anything on their web page. Where can I find info?

Really my only complaint from stock is it bottoms HARD on railroad tracks, bottoms on other big bumps, & some decent brake dive.
Traxxion sell springs - their site has a rider weight and intended use calculator which you might find helpful, especially if your fork truly is bottoming out. What they call a kit appears to be springs and spacers. <http://www.traxxion.com/Fork-Spring-Kits-by-Traxxion-Dynamics/>

Yes, I believe you would measure the oil height in the fork with the springs out of the way.

The effect of raising the oil height is to reduce the air space remaining inside the fork, so as the fork compresses there is less space for it to compress into, the air pressure raises and resists further compression, offering a bit of help to the spring. If the difference in heights seems dramatic, I guess it's a road-tested response to the soft front-end issues you are describing.

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