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Old 05-14-2009, 08:39 AM   #1
Jason_Canuck
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Need Help with 12" Tire Mounting

I have mounted 100/90/12 TT92s to some 12X1.6 Excel rims for my daughter's KLX110. I took bike out for a spin around the block and there is some slight headshake. Looking at tires, they don't appear to be seated properly on the rims. There are 2 lines running around the bead, and on one side of the rim both lines are exposed, but on the opposite side only one is showing. I would think tires are off center about 1/4 inch. Any recommendations on how to correct? I don't really wanna pull tire off rim again as it was an absolute to get on in first place and I marked up the rims pretty good.
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Old 05-14-2009, 08:45 AM   #2
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deflate the tire completely and use some ky (or appropriate lube)

You may have to over inflate a tad... don't get too crazy.
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Old 05-14-2009, 08:55 AM   #3
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You will probably have to over inflate it by a good amount to get the beads to seat on a 1.6" rim. I am actually surprised you got it on in the first place! It is difficult to get those tires on a 2.15" rim.
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Old 05-14-2009, 09:09 AM   #4
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as previously stated, re-lube/inflate. you may need to put the wheel upright (as if it were on bike) and weight the tire by pushing down on it.

i love how you call it your daughters 110...
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Old 05-14-2009, 09:11 AM   #5
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My daughter learned a few new words in the process of helping me put tires on. I hope to have it all ready for next Katy session. Bike is about 90% but I still need to find her some small gaunlet style gloves. If my photobucket account wasn't screwed up, I'd post up the pic I took last night.
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Old 05-14-2009, 09:12 AM   #6
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Quote:
Originally Posted by hotnanas View Post
as previously stated, re-lube/inflate. you may need to put the wheel upright (as if it were on bike) and weight the tire by pushing down on it.

i love how you call it your daughters 110...
No really it is. Bought leathers for her and everything. Please don't run her over at end of May, my wife will kill me.
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Old 05-14-2009, 09:17 AM   #7
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just keep airing it up and let it out till the bead sets properly, it's going to take a massive amount of air pressure but it will work, i do my own tires
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Old 05-14-2009, 09:17 AM   #8
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oh awesome, i thought it was one of those gifts for dad-ghter.
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Old 05-14-2009, 09:18 AM   #9
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Quote:
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oh awesome, i thought it was one of those gifts for dad-ghter.
Give it time, it will become Dad's bike!
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Old 05-14-2009, 09:20 AM   #10
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Quote:
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oh awesome, i thought it was one of those gifts for dad-ghter.
It is kind of. But if she takes to mini racing, I'll probably buy another bike.

The tubes I bought are a standard 12X3 tube, any idea how much air pressure I can put in them without them bursting?
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Old 05-14-2009, 09:23 AM   #11
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a lot. i inflated one of those to about 90-100 psi before I decided it was going to hurt someone.
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Old 05-14-2009, 09:25 AM   #12
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disclaimer: i wouldn't do that again. and I was wearing proper eye protection.
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Old 05-14-2009, 09:31 AM   #13
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I'll give it a shot tonight. Soap and water on bead?
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Old 05-14-2009, 09:31 AM   #14
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thats what i used.
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Old 05-14-2009, 10:41 AM   #15
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WRONG WRONG WRONG WRONG. Someone is fixxing to get hurt.. Im suprised some of you havent been hurt doing this. First of all DO NOT LET YOUR DAUGHTER BE AROUND THIS WHILE AIRING UP THE TIRE!!!!!!. Dude have you ever seen one of those explode. I HAVE!!!.. DO NOT USE KY OR VASOLENE. It will not dry and the tire can pop off the rim. Who ever said that needs to have their head examined... There is special tire mounting chemicals out there that dry after mounting. Soap and water can work but takes for ever. The key is to put a little air in at a time and make sure the tire is aligned all the way around the rim. By just putting it on and then airing it up the tire is offset and will never bead up. OR EXPLODE!! That tire is not designed for a 1.6 rim. Although i know a few of you running the 1.6 the tire will not wear and perform like it should as with a 2.15. Try just slightly airing it up a little at a time with soapy water in a spray bottle watching the alignment stripes if you cant get the mounting lube.. Wes
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Old 05-14-2009, 10:46 AM   #16
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So you're saying I shouldn't have to over inflate to get bead to seat? BTW what psi should I run in these?
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Old 05-14-2009, 10:50 AM   #17
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Yes you will have to over inflate. Thats why your daughter should not be around while doing this. With the proper lube NOT KY. Lubritech etc. It should mount with 60-80 psi. 100 psi can blow up the rim. That tire is not desighned for that size rim so you are basically forcing the tire on that is going to take you 80mph down the racetrack that can come off the rim and put you into the hospital or worse. As for racing pressure you might ask Carbon or Godsuki what they run. It is all over the board on that issue.
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Old 05-14-2009, 12:52 PM   #18
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Quote:
Originally Posted by Jason_Canuck View Post
So you're saying I shouldn't have to over inflate to get bead to seat? BTW what psi should I run in these?
What brand tires you running?

Start with 19-20 psi (both), objective is to achieve 22s when you come off the track "hot"...
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Old 05-14-2009, 01:20 PM   #19
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Do as KTM racer says. I had the same problem with my tires on my 65 a couple of months ago (not as narrow a rim as yours, but still), and this is what I did:
I used a little bit of WD 40 (it will evaporate) around the lip of the rim at no pressure, then inflated to 60 psi with the tire off the ground. Let it sit for a while and check from time to time. The tire will sit properly eventually. This takes patience.
Do not test ride while lubricating fluid is still wet, and make sure you drop the pressure to 18 or 19 psi before riding (always wear safety gear).
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Old 05-14-2009, 02:24 PM   #20
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Quote:
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just keep airing it up and let it out till the bead sets properly, it's going to take a massive amount of air pressure but it will work, i do my own tires
+1

air it up and over inflate. it will help set the bead where it needs to be. Then deflate to the desired air pressure. Repeat if needed. But like previosly mentioned above, don't go crazy over inflating.

This is actually how we would install new rubber on most street tires.. inflate till you hear two "pops". That's when you know when the bead has set. Then you check it.

Dirt tires don't really "pop" though.
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