Handling suddenly squirrelly

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rhody

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:dribble:

Ok, I must be lucky, or someone must looking out for me, first time I ever had the unsettling experience of riding with a slow leak in the rear tire. I couldn't tell tell for sure till I got home, and checked it.

My original Metzler Z4's are shot at a little over 6K miles, new Pirelli Diablo Strada's on order. Thanks, JeffAshe for the recommendation, I hope they will be much better than the original Metzler's on the bike, the handling on the Z4's was unsettling (greasy) in colder temps in the Northeast where I hang.

As luck would have it, before the ride, I dialed in a bit more front compression/rebound damping before the ride, so I was a bit confused at first, thinking the weird handling had something to do with that.

A little voice in the back of my head said , [SIZE=18pt]WTF !!![/SIZE], it can't affect the handling that much.

Once, last winter I let the rear tire get down to about 32 psi and the handling went dowhill in a hurry, especially at a medium pace, trying to crank into corners. I immediately set the front/rear to 40/42 psi and all was well.

The rear was down to about 25 lbs and slowly going down when I parked and checked it. After putting more air in it went down right away. The slow leak is in the center of the rear and it looks like a plug will hold it till I get the new skins later this week. My question is this, has anyone driven on a slow leaker with little or no air and lived to tell about it ?

Especially you guys who ride on the errr..., umm..., aggressive side ?

I consider myself lucky nothing happened, and my sense from low pressure handling this winter was a reminder that things can and do go wrong. This is my first flat on the road, ever, and hopefully my last. Has anyone out there farkled their bike with one of them their fancy wireless air pressure sensors ? And did it save your ass in the event of a slow leak ?

 
The rear was down to about 25 lbs and slowly going down when I parked and checked it. After putting more air in it went down right away. The slow leak is in the center of the rear and it looks like a plug will hold it till I get the new skins later this week. My question is this, has anyone driven on a slow leaker with little or no air and lived to tell about it ?
Especially you guys who ride on the errr..., umm..., aggressive side ?
Four punctures in the rear tire so far. On the highway at 80 mph +/- for one of them, on a twisty road at about 50 mph for the most recent. VERY civilized response from the bike. I had to ride completely flat rear tires for a little ways both times as they went flat and on the most recent puncture actually rode about 5 miles after the fix-a-flat didn't fix the flat (probably got me up to about 10 psi). I know I'm not supposed to use that crap, but it truly was my only option within about 19 miles, so I had to try...

Bike's response to a flat rear tire is MUCH heavier steering. That's it. No wobblies, maybe a tiny bit more squirmy feel to the rear. I don't know if it's because the tires have such a low profile, but I'm guessing there just ain't that much sidewall to flex and cause problems.

Good luck,

RsvlFeej

 
Not safe, but i did ride EOM, last year with a slow leak, many times it would just drop to about that 25+ range, since i carried a small compressor, i would air it up at stops such as the country store on the snake runs.

later found it to be a bad vavle stem.

 
had the rear "mysteriously" loose 10 lbs after a trip to the dealer.

made the bike feel decidedly different. not in a nice way either.

straight line running was not too bad, but try to enter a turn WTF !!!

it wanted to fall over, was very difficult to handle. as soon as i got home, i checked the pressures,

and found both front and rear down by 10 lbs. didnt bother to call the dealer on it.

you can bet ill be checking the pressures BEFORE i leave them next time.

jason

 
You will really like the handling change when you get the Stradas. Tire profile is much different than the Z4s making handling much quicker, lighter and more precise. I burnt up two sets of Z4s, got roughly 6k/ea. I got ~5k miles out of a set of Z6s. My current Strada has the cords ghosting through at 10k miles. At about 8k miles my Stradas went from light and flickable to truck like handling.

I wouldn't take a chance on riding a leaker, you can't control how much it will leak and don't know if some riding may exacerbate the problem leaving you beside the road in a location not of your choice (at best). Rapid tire deflation is NOT your friend, BTDT but survived.

Use the search for +tire +monitor and you should get a bunch of recent threads.

 
Started out on my GSXR750 after checking the air pressure. 15 minutes later I just happened to be riding past the dealer and stopped in. Hey can you check my shock, it's riding funny? I wonder if it could be that sheetmetal screw in the tire slick? Felt like a dumbass!

 
I was riding two up on a BMW R1100RT and had twio nails 180 degrees apart. The bike handled ok , but when I went into some fast sweepers the cerstand touched...............thought we were getting to fat. 10 miles later we stopped for coffee. Thas when I found out the tire was almost flat and had 2 nails in it. They were 2 penny nails. I was realsupprised it handled as good as it did. We were traveling about 65-70mph. The tire was a Metzler Z2.

 
I've actually had a flat @ 120 a few months ago(rear)......centrifugal force keeps the tire round and "full" . When you slow down to about thirty-ish it gets squirrelly but buy then I had a straight decelerating line, and stopped safely with no brakes the flattened tire will slow you down about the right amount. With the profile of the tire it was very stable considering it was flat. I think I picked up a nail earlier and flung it when I got up to that speed???? there was a hole and nothing else there, pluged it went on my way still had a good day.(Just slower) :angry2:

 
B)

Thanks for the replies. They give me confidence that the tire construction will not contribute to splatting you down the highway with less than optimum air pressure.

Just got the new Pirelli Strada's in today, but can't get them on till Tuesday. Going to be a nice weekend, and have the rear plugged (center) and didn't hear any belt separating when the plug went in.

Next question, can I ride for a couple hundred miles with the plug without problems ? I searched the forum and the general opinion is yes, and long as you don't act squidly on the bike. Opinions (good, bad, fugly) are appreciated. This forum rocks !!!

P.S. ionbeam: I would be interested in your opinion of the Strada's, Jeff (Haulin) Ashe thinks they are really good performance wise in hot and cold weather we have in the Northeast. PM me if you like, or post your opinion for the benefit of all.

 
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