Scalloping fronts on Dunlops new 407s
Scalloping fronts on Dunlops new 407s
Road Master
Joined: Oct 2008
Posts: 880
Likes: 81
From: California
A few things... First, there are MANY thread here about this tire cupping. Second, you say that you keep the pressure "at 34 36 psi". I take that to mean 34 front and 36 rear. If that's the case, then the cupping/scalloping is likely a result of under-inflation. The 09's call for 36 front & 40 rear.
Elite HDF Member
Joined: Jun 2009
Posts: 4,640
Likes: 8
From: Corpus Christi,Texas
Low tire pressure will exacerbate this wear pattern and you will lose many serviceable miles by running low. Improper balance has nothing to do with cupping on a motorcycle tire. Improper balance will merely cause your bike to vibrate within certain specific speed ranges.
Road Captain
Joined: Aug 2008
Posts: 528
Likes: 4
From: Alberta Canada
Well they never changed mine for free, 9300 miles and it was all over for the 407, I ran 36psi when the bike was new then up'd it to 38psi for the last few thousand miles and it still cupped. Hope the 408 lasts longer than that at 300 bucks a pop! I ain't happy about that.
Tourer
Joined: Oct 2007
Posts: 392
Likes: 2
From: Southeastern Wisconsin
40 front and rear is the new suggested air pressure for the D407s. It does make a difference in the ride. The MOCO replaced my cupped 407 with a new 408 at ~11,000 miles for free. Call and tell them your concerned with what appears to be premature tire wear and very uneven wear. Took some talking but they did it for me last month. They told me they were getting LOTS of calls about the D407s poor wear. (Especially after they announced the new tire for the 2009s would give better wear with the new harder toire compund in the center and softer on the edges for better handling.)
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Banned
Joined: Jul 2008
Posts: 481
Likes: 2
From: Bgosh,WI
Run it harder and get it balanced. Its going to need it now and may have been part of the problem
Last edited by 78fxs78; Sep 30, 2009 at 09:45 PM.
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Banned
Joined: Jul 2008
Posts: 1,036
Likes: 67
Anybody else having D407F problems
Nobody but you and thousands and thousands of people who purchased early 2009 production touring bikes. Unfortunately most of us only got a "Sorry, that is a wear issue" speech and nothing else. It borders on criminal behavior. We won't forget it either. The worst thing is that you can't buy a 407 tire from anyone but a Harley franchise dealer. There are no other manufacturers making that oddball 17" tire.
