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pancho
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« on: April 20, 2015, 03:32:44 PM » |
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I pulled this Dunlap E3 off my bike yesterday, 15K or so, no cupping, even wear, the tire had always acted well and never any problems.  I put an Avon Cobra on, and was suprised to see no paint mark where the valve stem goes, and on my static balancer it was so good that I would not have put any weights on it. But, for the first time I had ceramic beads for balancing and put 1.5 oz. in. This tire calls for more, but it was so well balanced I used that amount. As I have always seen, if you are going to put them through the valve stem, you MUST do it slowly to keep from stopping constantly to tap the valve stem free.  The bike had always pulled slightly to the left, it could still be ridden hands free and butt steering, but I had to sit on the side, almost edge of the seat. Now I had balanced that Dunlap and wheel, and split the weight on either side of the center ridge and had a span of distance between them, about as good as I could do with a static balancer. Well the Avon with the ceramic beads tracks perfectly,, right down the center with no hands,, very easy butt steering. So,,, it seems that perfect balancing has something to do with pulling to one side or the other??? or was it the tire? |
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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gordonv
Member
Posts: 5763
VRCC # 31419
Richmond BC
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« Reply #1 on: April 20, 2015, 05:45:59 PM » |
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I think your steering is not straight. Maybe the front axle not in properly, or you need to set the front end.
Going by memory, but I think you loosen the lower pinch bolts of the triple tree and maybe the axle. Then roll forward and hit the brakes. Do this multiple times. Makes everything align properly.
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1999 Black with custom paint IS   |
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sandy
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« Reply #2 on: April 20, 2015, 05:53:26 PM » |
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First, nicely polished wheel. 2nd, why didn't you change the valve stem to a screw in stem? 3rd, Avons use to come without a valve stem dot. A while ago they started doing it. Check the date code on the tire. And last, all MC tire manufacturers void the warrantee if you put anything inside the tire. I always have weights on the wheel for balancing.
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BonS
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« Reply #3 on: April 20, 2015, 06:16:39 PM » |
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And last, all MC tire manufacturers void the warrantee if you put anything inside the tire. Sandy, tell me what you know. I've done a lot of searching about this and have even read Dunlop's motorcycle tire warranty literature and they don't mention balancing beads or fluids or sealants like. My local Honda motorcycle dealer sells "Bike Beads" which are balancing beads. If there are confirmed reports of warranty denials based upon balance beads you'd think they'd know it. |
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sandy
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« Reply #4 on: April 20, 2015, 09:37:18 PM » |
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And last, all MC tire manufacturers void the warrantee if you put anything inside the tire. Sandy, tell me what you know. I've done a lot of searching about this and have even read Dunlop's motorcycle tire warranty literature and they don't mention balancing beads or fluids or sealants like. My local Honda motorcycle dealer sells "Bike Beads" which are balancing beads. If there are confirmed reports of warranty denials based upon balance beads you'd think they'd know it. My local MC tire shop has this info from his supplier. He sells Stones for wings, Dunlop, Metzler and Avon. His info is "Nothing inside the tire". |
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pancho
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« Reply #5 on: April 21, 2015, 08:09:31 AM » |
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First, nicely polished wheel. 2nd, why didn't you change the valve stem to a screw in stem? 3rd, Avons use to come without a valve stem dot. A while ago they started doing it. Check the date code on the tire. And last, all MC tire manufacturers void the warrantee if you put anything inside the tire. I always have weights on the wheel for balancing.
Sandy,, control your killer instincts,,, there is a brand new all metal, nut on the outside, valve stem on that wheel, and the tire date code is 3914, and, I would have put the beads in no matter what the manufactures recommended,, I have done the research and it was time for me to try them. What I am hoping for is some input on why the slight pull to the left is gone,,,, beads or tire?? |
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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sandy
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« Reply #6 on: April 21, 2015, 06:48:50 PM » |
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Your valve stem shows the plastic support still on the stem. They're not needed on a screw in stem so I assumed you still had the rubber stem. It was late last year the balance dot was added so you have a recent tire. My comments are meant to help, not criticise. Sorry for the confusion.
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wiggydotcom
Member
Posts: 3387
Do Your Best and Miss the Rest!
Yorkville, Illinois
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« Reply #7 on: April 21, 2015, 07:18:33 PM » |
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For those who think the heavy spot of their rim is at the valve stem, have you confirmed that with a static balancer or other means?
Just curious because when I static balance my rim only, the heavy spot is NOT at the valve stem.
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VRCC #10177 VRCCDS #239  |
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hubcapsc
Member
Posts: 16785
upstate
South Carolina
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« Reply #8 on: April 22, 2015, 03:36:05 AM » |
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Your valve stem shows the plastic support still on the stem. They're not needed on a screw in stem so I assumed you still had the rubber stem. It was late last year the balance dot was added so you have a recent tire. My comments are meant to help, not criticise. Sorry for the confusion.
HAL47 gave me the plastic support from his tool bag, and I snapped it onto my front metal stem. If I had another plastic support, I'd snap it onto my back one... -Mike "bling  " |
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pancho
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« Reply #9 on: April 22, 2015, 08:23:46 AM » |
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Your valve stem shows the plastic support still on the stem. They're not needed on a screw in stem so I assumed you still had the rubber stem. It was late last year the balance dot was added so you have a recent tire. My comments are meant to help, not criticise. Sorry for the confusion.
We're good Sandy, no confusion,,, while not necessary, I keep the valve stem keepers on because the valve stems I use can rotate without them, and to me they are just part of the assembly. This Avon tire really handles well with a worn Dunlap in the rear, as someone mentioned in a previous post, it does seem to "fall" into a turns,, it goes down easily. When I pull the rear wheel to put the Cobra 180 on, I am going to put some beads in the Vredestein sport track I have on another wheel, put it on, and see how the bike handles with that combination. |
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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Paladin528
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« Reply #10 on: April 22, 2015, 09:40:15 AM » |
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In answer to your original question, The Tire is generally the cause of the pull assuming the geometry of the front end is straight. Balance will cause wheel hop but the tires are not wide enough to have a dynamic balance issue from left to right.
The Dunlop tire tread seems to have that affect for some reason. The Avon is much nicer to ride on but as mentioned you need to be ready for the lean in the twisties and it goes quick.
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