Fork ride height adjustment - Wrist Twisters
 
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post #1 of 11 Old 04-27-2010, 08:00 PM Thread Starter
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Fork ride height adjustment

Will sliding the forks up the triple tree about half an inch make a marked difference in the ride feel, road manners, handling, etc. of the 919?

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post #2 of 11 Old 04-27-2010, 08:10 PM
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Quote:
Originally Posted by applespeed View Post
Will sliding the forks up the triple tree about half an inch make a marked difference in the ride feel, road manners, handling, etc. of the 919?
yes, very much. I'd start small, let's say 5mm and wouldn't do more than 10MM.

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post #3 of 11 Old 04-27-2010, 08:42 PM
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Quote:
Originally Posted by applespeed View Post
Will sliding the forks up the triple tree about half an inch make a marked difference in the ride feel, road manners, handling, etc. of the 919?

Yes
You will lose over 2 mm of trail from this alone, plus a bit of steering head angle.
What are you trying to accomplish ?
Or do just want to try it ?
And have you already used up all of your front ride height adjustment, or do you have a pre 04 non adjustable type ?

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post #4 of 11 Old 04-27-2010, 09:08 PM
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Quote:
Originally Posted by mcromo44 View Post
Yes
You will lose over 2 mm of trail from this alone, plus a bit of steering head angle.
What are you trying to accomplish ?
Or do just want to try it ?
And have you already used up all of your front ride height adjustment, or do you have a pre 04 non adjustable type ?
maybe thats why my bike felt different and i felt sketched out when i went out this weekend.... rebuilt the forks on my 04 (had to change seals on my left one so i refilled fluid in both) and brought the "preload" adjusters up from fully down where they were at (highest ride height) to 4 notches up (a good 8 to 10mm or so) hmmmmm

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post #5 of 11 Old 04-27-2010, 09:49 PM Thread Starter
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Yeah unfortunately its the '02 non adjustable forks...

One of my buddies suggested this to "improve" handling but he said he doesnt exactly know what its effects are...

Is this a bad or good adjustment to the bike?

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post #6 of 11 Old 04-28-2010, 01:16 AM
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Improve handling?

Define improve - what do you hope to achieve? Personally I really like the neutral handling of the 919.

Popping them through the T's will quicken the steering for faster turn-in, but decrease to a degree the straight line stability due to the loss of trail.

If you want to experiment, as suggested, raise them in the t's a small amount only and see if you like it.

If it is quicker steering u want I'd looking at a pure sport compound front tyre as they tend to be more oval (or V shaped) in profile and will quicken the turn in compared to a rounder sport-touring tyre.

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post #7 of 11 Old 04-28-2010, 02:00 AM
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Quote:
Originally Posted by applespeed View Post
Yeah unfortunately its the '02 non adjustable forks...

One of my buddies suggested this to "improve" handling but he said he doesnt exactly know what its effects are...

Is this a bad or good adjustment to the bike?
For me, it was a good one. I pushed my forks up 10mm and like the quicker turn-in. The change was awkward for the first few rides, but now, it's like that's the way it was meant to be.

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post #8 of 11 Old 04-28-2010, 07:03 AM
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So, you have an early 919 with the buckboard rear spring rate and the mush fronts that never changed. My guess is that you are not running much preload at the back, rear spring rate noted again. You can play with the front and see how you like it, but don't go too far, I'd say 5 mm max. AllenB made an excellent comment in that lots of so called "front end handling" is tire shape derived. Anyway, a 919 is a real stable platform and one needs to go fairly far to upset it. If you are looking for "improved handling" for your bike, consider swapping in a used 04 or later rear shock - that said assuming you are of average weight. Also, if you are happy with the bike's handling, and aren't out to spend time playing with all the things you can play with, why make fork tube height changes for no other reason than someone else suggesting it to you, even though said person could not explain why or what to expect? By the way, what tires and pressures are you running ?



One of my buddies suggested this to "improve" handling but he said he doesnt exactly know what its effects are...

Is this a bad or good adjustment to the bike?[/QUOTE]

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post #9 of 11 Old 04-28-2010, 07:20 AM
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Does anyone read the 919 Helpful Topics these days?

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post #10 of 11 Old 04-28-2010, 07:53 AM
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Quote:
Originally Posted by MisterMike View Post
Does anyone read the 919 Helpful Topics these days?
As soon as I read the first post, I thought of posting a link to there. Read a little further and Mike has it covered.

Mike, If I drop my triples until they rest on the fork dust seals, will handling be affected?

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post #11 of 11 Old 04-28-2010, 09:32 AM
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919 Helpful Hints

I'm still in awe of this collection of info !


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Originally Posted by MisterMike View Post
Does anyone read the 919 Helpful Topics these days?

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