Warning ! Dunlop D208 GP Racer M not High Speed Resitant - MVAgusta.net
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post #1 of 32 (permalink) Old 06-06-2007, 06:47 AM Thread Starter
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Warning ! Dunlop D208 GP Racer M not High Speed Resitant

According to "Motorrad" the leading German Motorcycle Magazin, is the Dunlop D208 GP Racer M not suitable for high speed. They report that, the middle of the Tyre was gone after just a few kilometers max speed.
They drove all together not more than 155 km (90 mls), including warm up for the Engine and by far not all the time at max Speed. Which is even on German Soil not possible because of all the traffic. The asphalt Temperature was 15 degree celsius, the Tyre Temperature was at about 70 C after they drove about 80 km. At this Stage was the Tyre as new !
A certain Part of the 312R Production will be delivered with the Dunlop D208 GP Racer M.
"Motorrad" is investigating this Issue further and it expected to get a Feedback from Dunlop soon.
Until than You have to look at Your Tyre frequently if You are riding full speed, full throttle.
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post #2 of 32 (permalink) Old 06-06-2007, 07:06 AM
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Oppssss.... not good.

Thanks for the info.

Although it's not probable the 312R owners will be doing max speed for that many kms and although tha may have been a one tyre defect, it's always good to know that and be alert
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post #3 of 32 (permalink) Old 06-06-2007, 07:20 AM
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At high speeds the tire expands. They should check the clearance between the tire and the swingarm and make sure it meets Dunlop factory specs. In fact, if you look at the tire in question it appears to be destroyed more on the swingarm side then just in the center. I'm guessing, but could be the culprit as we've seen in the past racers even having this problem with tires exanding.

Jack
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post #4 of 32 (permalink) Old 06-06-2007, 08:22 AM
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Hi Haupti,

I think it will be of interest to our friends to see the comparison diagrams of 1000R and R312. If you can scan & publish it.


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post #5 of 32 (permalink) Old 06-06-2007, 08:31 AM Thread Starter
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You can find the Report at www.motorradonline.de. In German of Course. There was no comparison to a 1000R or S or what ever. They say this is not an Issue what is concerning for the Speed of the 312R only. Here they warn all high Speed Racers. By the Way they tested a Pirelli Dragon Supercorsa Pro in a second session and didn't had any problems.
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post #6 of 32 (permalink) Old 06-06-2007, 09:04 AM
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Quote:
Originally Posted by Gladio
At high speeds the tire expands. They should check the clearance between the tire and the swingarm and make sure it meets Dunlop factory specs. In fact, if you look at the tire in question it appears to be destroyed more on the swingarm side then just in the center. I'm guessing, but could be the culprit as we've seen in the past racers even having this problem with tires exanding.
That's a great point. But if it's an OEM fitment, that's not cool at all.

I'm pretty sure that tire can handle top speed of that bike. Those tires go around Daytona all the time on bikes probably going faster.

But then again, Dunlop does have race tire failures now and then. Not common, but I think it happens more with Dunlop race tires than others, based on limited personal observation.

Also note that street tires probably don't have anything to do with race tires in this case.

'01 F4S
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post #7 of 32 (permalink) Old 06-06-2007, 09:20 AM
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Quote:
Originally Posted by Gladio
At high speeds the tire expands. They should check the clearance between the tire and the swingarm and make sure it meets Dunlop factory specs. In fact, if you look at the tire in question it appears to be destroyed more on the swingarm side then just in the center. I'm guessing, but could be the culprit as we've seen in the past racers even having this problem with tires exanding.
Yes, that's the most probable explanation.

I've also heard that the same thing happens with the 1098 and some racing tyres, but i don't know which ones.
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post #8 of 32 (permalink) Old 06-06-2007, 09:43 AM
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Just spotted a pic of Martin Finnegan in MCN this morning that shows him on MV with part of front guard eaten away . Dunlops on the bike.

Something to be aware of when changing rear sprockets and moving wheel forward.

Wonder if Martins bike shows any contact with Rad at the front ?
Juan ?
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post #9 of 32 (permalink) Old 06-06-2007, 09:54 AM
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Dunlops used to have very high pressure for there tires. 2.5bars front and 2.9bars rear, isn't it the same for the GP Racer? Maybe part of the explanation... plus, racing tires are not made for high speed highway use...
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post #10 of 32 (permalink) Old 06-06-2007, 10:01 AM
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Hey Ian.

Mine does

My Dunlop front rubs the fairing when I turn the wheel, and it rubbed the seperator between the radiators. Didn't hit the radiators that I could see though.

I raised my fender so that's not an issue either.

'01 F4S
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