March 6th, 2010, 08:19 PM | #1 |
212
Name: Lisa
Location: Houston, TX
Join Date: Dec 2009 Motorcycle(s): 09 250R, 09 ZX6R Posts: 121
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Tires - does anyone else have this problem?
...or maybe the the lip on the tire is normal? These are the Pirelli Dragons. Still on stock suspension although it's getting upgraded next week. It feels like the bike is bouncing/wiggling a lot. Plus the track I was riding at today is pretty bumpy. I'm new to riding the 250 so maybe that's just how it is...but going back between my 600 and the 250 makes it really noticeable.
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March 6th, 2010, 11:09 PM | #2 |
ninjette.org member
Name: Keenan
Location: Newmarket, Ontario
Join Date: Jan 2010 Motorcycle(s): 2009 Kawasaki Ninja 250r Special Edition Posts: 217
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eeek, that doesnt look normal. the rubber shouldnt be flaking.
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March 7th, 2010, 09:19 AM | #3 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
Blog Entries: 7
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That part of the tire looks great, it's what happens as they heat up on track. The cupping on the lip could be a rebound issue, but without an aftermarket shock there isn't much you can do about it AFAIK. Once the suspension is upgraded, there are more options to try and dial some of that out.
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March 7th, 2010, 09:51 AM | #4 |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
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From what I know about motorcycle tire wear, cupping / scouping on the front tire between the tread on the front side of each tread line "trench" is how they normally wear; but on a rear? I dunno. Also, it's really pronounced with all that racing slag (perfectly normal for tires on the track, Keenan84)! I'd bring it up with the manufacturer. It's like the inner wall of each treadline is too tough.
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March 7th, 2010, 12:26 PM | #5 |
212
Name: Lisa
Location: Houston, TX
Join Date: Dec 2009 Motorcycle(s): 09 250R, 09 ZX6R Posts: 121
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What about tire pressure? I ran 24 hot off the warmers.
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March 7th, 2010, 02:08 PM | #6 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
Blog Entries: 7
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the proper pressure on the dragons. I hope someone with some experience on 'em sees the thread and provides some additional help...
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March 7th, 2010, 03:52 PM | #7 |
Canyon Racer
Name: Sean
Location: Santa Monica, CA
Join Date: Feb 2010 Motorcycle(s): 09 GSXR600, 03 EX250 Posts: 17
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Definitely looks like a rebound issue.
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March 7th, 2010, 03:53 PM | #8 |
ninjette.org member
Name: Keenan
Location: Newmarket, Ontario
Join Date: Jan 2010 Motorcycle(s): 2009 Kawasaki Ninja 250r Special Edition Posts: 217
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bahah ok my bad. im learning!
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March 7th, 2010, 09:43 PM | #9 |
Pimpin
Name: Richard
Location: Ninja 250 Whorehouse
Join Date: Nov 2008 Motorcycle(s): Bunch of em Posts: 973
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Hmmmmm 24 hot might be proper tire temp for a normal bike, capable of putting heat into the tire. Ask your tire guy what the temp should be coming off the track. Then, measure yours. I'm betting you're nowhere close to that temp. Our 250s are so slow, they can't put much heat into the tires. So..... 24 hot might be fine for a 600 or 1000, but it will need to be 28-30 hot on our bikes. I've been through this with the Michelin Power One race tires. I went out at 24 psi and ruined my rear tire in 2 sessions wallowing through turn 8 at Willow. Bumped it up to 26 cold and the problem went away. Just my 0.02
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March 8th, 2010, 10:59 AM | #10 | |
212
Name: Lisa
Location: Houston, TX
Join Date: Dec 2009 Motorcycle(s): 09 250R, 09 ZX6R Posts: 121
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Quote:
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