spring rates on a 919 for big guy - Wrist Twisters
 
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post #1 of 9 Old 09-17-2014, 07:26 PM Thread Starter
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spring rates on a 919 for big guy

K, I'm reading the threads on options for shocks, etc.
One thing I'm not finding is a link to some kind of spring rate chart for the 919.
I've got a used stock 07.
I'm trying to find out what it was sprung for (I assume it's around 170 as most bikes seem to be sprung for elves and pixies from the factory).
I'm 300 on a good day before I put gear on, and I know when I resprung my xr650l it felt and handled a lot better for me.
So... is there a spring rate chart for these things somewhere...or is it all by anecdote?

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post #2 of 9 Old 09-17-2014, 09:05 PM
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Have you tried the spring rate search on Race Tech Suspension

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post #3 of 9 Old 09-18-2014, 02:10 AM
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I had a custom spring made for the shock that works out around 1200lb, and I weigh in the area of 200lb, with gear.

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post #4 of 9 Old 09-18-2014, 05:31 AM Thread Starter
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the front forks will calculate there... but not the rear... says I'd have to call... so might have to do that.

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post #5 of 9 Old 09-18-2014, 06:21 AM
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If someone here has a stock '02 shock with the original spring I'd recommend you give it a try: my '02 has never had the preload adjuster moved from the lowest setting, and frankly that spring is too stiff for my 182 pounds, but with my 122 pound daughter as a passenger the ride is downright plush without moving the preload.

Of course the spring will fit your '07 shock, so that would give you the best of both worlds -- a proper spring rate, or at least closer to what you need, and adjustable damping.

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post #6 of 9 Old 09-23-2014, 04:36 PM Thread Starter
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I did get ahold of Racetech, and they have no advice to give me...they haven't done any rears on them so don't know what to advise for spring, spacers, etc.

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post #7 of 9 Old 09-23-2014, 09:48 PM
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I think Rob's suggestion is a cheap and easy place to start - the early spring was alleged to be in the area of 1100lbs, IIRC, and will give you some idea if that's going to help.

NZspokes did some playing around with the early and later shocks before selling his bike - maybe you could PM him to see what his experience was.

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post #8 of 9 Old 09-25-2014, 04:28 AM
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Quote:
Originally Posted by K1w1Boy View Post
I think Rob's suggestion is a cheap and easy place to start - the early spring was alleged to be in the area of 1100lbs, IIRC, and will give you some idea if that's going to help.

NZspokes did some playing around with the early and later shocks before selling his bike - maybe you could PM him to see what his experience was.
Apparently the pre '04 919 / Hornet was supplied to the U.S. with a higher spring rate than was supplied to other countries. From the general information on this forum it's over 1000 pounds per inch, but I don't know the exact number. Regardless, it is pretty stiff and worth a shot for someone of your mass. Fortunately there are a number of members here who have gone the aftermarket rear shock route, so there may be an '02 / '03 spring out there somewhere.

Rob

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post #9 of 9 Old 09-26-2014, 07:31 PM
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