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Discussion Starter #1
What tire pressure do you run? I just switched tires from the stock Pirelli to Michelin PR4's and started having speed wobbles under hard acceleration only. Called the dealer and they told me to set the rear tire to 31psi and the front to 33 psi. It did help with the speed wobbles but the stock tires I had were set to the manual recommended settings of 36 psi rear and 33 front and never had an issue. Any opinions on why there was no issue with the old tires at the higher pressures?
 

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New tires shouldn't cause a wobble. Get the wheels off the ground and spin them while watching for tread movement side to side that may indicate the tire isn't seated on the rim correctly. You may be able to let most of the air out and bounce the wheels to reseat the bead if this is the case. Otherwise, if you didn't have a tire/wheel problem, and after changing the tires you do have a problem, most likely it's the tires.
 

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Discussion Starter #6
I did adjust the sag and tried many combinations of rebound and compression settings but still had the wobbles. Once I set front tire to 33 and rear tire to 31 the problem went away. I originally had the front set to 33 and the rear set to 36 as per the owners manual but the dealer said that they were told by Pirelli that the correct range for the monster was 28-33 rear and 31-35 front. Dealer also said they follow those ranges for other brand tires also.
 

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I did adjust the sag and tried many combinations of rebound and compression settings but still had the wobbles. Once I set front tire to 33 and rear tire to 31 the problem went away. I originally had the front set to 33 and the rear set to 36 as per the owners manual but the dealer said that they were told by Pirelli that the correct range for the monster was 28-33 rear and 31-35 front. Dealer also said they follow those ranges for other brand tires also.
Yeah, gonna need some receipts on that...

Not once i had problems with the 33psi front, 36psi rear like stated in the manual, those are also the "default" pressures used on 80% of the bikes out there...

The M1200 feels like a freight train regarding stability at high speeds compared to a -say - 696/796/1100 for obvious reasons - something tells me that your wheel balancing is off mate
 

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Discussion Starter #8 (Edited)
Yes I agree. I do not see why my bald Pirelli at the same pressure as the new PR4's would not give me any issue. I am planning on bringing it in to the dealer for a look. As far as I can tell the tires look like they were installed correctly, There are wheel weights on each tire but not sure if they are balanced correctly. So now my question is if the tires are not installed correctly how come changing the pressure and going back to stock suspension settings helped? Of course dealer did say they will check my suspension to make sure it is set up correctly but never mentioned there could be a problem with balancing or any other aspect of the install.
 

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I've gotten defective tires before. Out of round once, and the tread wandered on one, and a rippled sidewall. You might just have a bad tire, it happens. The out of round one I had got replaced 3 times, all were out of round, all came from the same batch. They were only out by a little , but i could feel it.
 

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Discussion Starter #10
Thanks for the info Duc96. How did you/dealer determine the tire was out of round? And were the symptoms speed wobbles?
 

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Symptom was a shake in the bars at one speed, higher speed fine, lower speed fine. You could see it on the balancer. . Remounted in different spot and high spot moved with it. You can use a pointer or a gauge to measure . Tire rep was there by coincidence, came back for the tire change. He had them measure the bare wheel for runout, clean the bead, and remount two more tires. He agreed it was out of round, not my wheel. All available tires were from the same production run, all out of round by a small amount, so I got a refund.
 

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the tyre itself is very unlikely to be 'out of round' - they are moulded

But it is possible that it has not been fitted well so is still stuck down off the tyre land at some point?
 

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Discussion Starter #13
So does anyone run recommended pressure of 36 rear and 33 front? And does not have an issue with speed wobbles. Although adjusting pressure to 31 rear and 33 front helped( but did not eliminate) I still can't understand how I didn't have an issue until after the new tires were installed.
 

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My local Ohlins specialist set up the suspension and recommended 36psi front and rear (42 with a pillion) on the Pirelli Rosso
It worked well and even better since i put the Metzlers on
 

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Have my stock pirellis set to 33/36 f/r with no issues. I know those aren't your tires, but as it's Ducati's recommendation, I'd start there. After all, both the pirellis and the Michelins state higher pressures on the side walls. This is after making sure the tire is balanced. Is it also the EXACT same size as the stocker? In another far off question, do you have too much pressure on the bars during these wobbles?
 
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