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Old 06-19-2012, 11:28 AM   #1
675Raisinator
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250 suspension

Recently put full suspension on 250 track bike. I am running racetech springs and heavier fork oil upfront with preload adjusters and have penske rear shock. First time out on the track with the new gear I noticed the rear tire took A LOT more abuse than the front. I liked the rear damping but would like the rear to sit highter (or lower the front?) Front forks seemed just minutely stiff so I dont want to mess with them if I dont have to. Any ideas what would be ripping my rear tires apart while leaving the fronts in better shape? Could I achieve higher ride height by just adjusting rear pre load?
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Old 06-19-2012, 11:31 AM   #2
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Lot's of questions there.
First, what are you wanting to achieve by raising the ride height? Additional ground clearance or quicker steering?
Second, what rear sag numbers do you have currently?
Third, do you have Emulators in the front forks?
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Old 06-19-2012, 11:34 AM   #3
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1. I would be in more comfortable riding position with the rear of the bike sitting higher

2. Have not had the opportunity to measure anything at this point

3. Yes emulators up front
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Old 06-19-2012, 11:39 AM   #4
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If it's just a body position issue I'd be careful about raising the rear too much.
As you raise the rear you steepen the rake and diminish the trail, making the bike more twitchy. Too much and the bike will want to tuck the front end.

I'd recommend setting your sag and then setting the geometry similar to a stock bike and working from there.
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Old 06-20-2012, 01:12 PM   #5
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i wouldn't suggest adjusting ride height if the only outcome you are looking for is changing the riding position. preload adjustment will make very small changes to ride height, it will however have a larger effect on your sag and how your bike handles.

the ninja 250 was not a race inspired built bike, so it won't have that sportbike ergonomic feel.

are you sure you have the correct spring rate in the rear? who built the suspension for you? you should ask them for good geometry numbers for the front and rear.
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Old 06-20-2012, 03:54 PM   #6
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^^What Patrick and Tony said. Is the geometry still set at stock? Fork height at triple, rear height, sag, and spring rate.

Get rid of the front fairing cowling, and gauge cluster and drop your clip-ons lower if it's possible. That will get your chest lower and offset you needing to raise the rear.
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Old 06-20-2012, 04:04 PM   #7
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Or learn to not be a complete ... ya know whatever works.
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Old 06-22-2012, 12:48 PM   #8
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wtf
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Old 06-22-2012, 01:22 PM   #9
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Or learn to not be a complete ... ya know whatever works.


WTF?
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Old 06-22-2012, 01:44 PM   #10
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