how do u repair dirtbike tires, without pinching the tubes.?

Question

I have pinched about 12 out of the last 20 tires my boys and I repaired. we use 3 or sometimes 4 - 17'' tire irons. We try hard to be careful, but we always pinch tubes. please help.

Answer 1

I don't know what they are called, but they are plastic handle looking things they sell at the bike shop. They help out.

Answer 2

Install one bead of the tire on the rim.
Spray the inside of the tire with wd-40 to lube the inside of the tire, so the tube can slide around (no need to over do it).
Insert the tube in the tire and the valve stem through the rim.
Screw the lock nut onto the stem, just enough to be able to get the air chuck on (no more).
Remove the inner valve core.
Fill the tube with air until it conforms to the shape of the tire and lifts the top bead of the tire up (don't fill it to the point of over fill and explode).
Remove the air chuck and quickly put your finger over the valve stem, to prevent the air from escapping.
Spray the exposed inner tube with wd-40 so the tire irons have less of a chance of grabbing the tube (and pinch it).
Remove your finger and let the air out of the tube (don't press on the tire to force any air out).
Now the tube is conformed to the tire and has no flat edges or folds for the tire irons to grab. It's lubed to help the tire irons slip off it.
Tire flat on the ground, valve stem at 6 o'clock.
Insert a tire iron at 5 o'clock and just let is lay there with the tip in the tire (if the tire is small, say 15", you might want to put an additional tire iron at 4 o'clock)
Tire iron (LOL) the first part of the tire at 7 o'clock.
Hold that section of the tire down with your knee while going around the tire.
Insert the iron again at 8 o'clock (don't go straight in, go in between 8 & 9 and slide the iron toward 8 so it doesn't grab the tube.
Continue untill you can't safely get the tire iron in any more.
That's why the first tire iron was inserted at 5 o'clock.
It's already in there and has less of a chance to pinch the tube.
Finish the job with that iron.
Fill the tube until both tire beads pop into place.
Put the valve core back in.
Fill to specs and tighten the lock nut.
I know this is long. Read it a few times and everything will make sense.

Answer 3

Try heating the tire up with a hair dryer then using corn starch on the tire. It should slip right on. Also make sure you have a little bit of air in the tube. I always start at the rim locks.

Answer 4

Talcum powder and partially inflate the tube helps keep the tube away from the bead area. Good motorcycle techs use only there hands to mount up tires (yea right) The irons with spoke hooks act as extra hands. Inside the tire nylon shield keeps thorns from puncturing the tube on MX, ATV tires. AND "SLIME" sealer Will help you keep aired up.

Answer 5

Sorry, I can't for the life of me think of the name of the tool, but I used 2 large 'thingamagigs'. They are hard plastic, red and curved on each end. You slip one anywhere on the rim, then slip the other one on the opposite end and pull in a circle toward the other pin, and the tire comes right off. Sorry I can't remember the official name of the tools. I got at a shop.

Answer 6

called tire spoons they make the job alot easier.....
and remember to put baby powder in the tire when assembly
also I inflate tube two or three times after mounting, before
final inflating.... the powder helps tube move in tire and
helps to stop the tube from pinching or folding.....
one last word .. put some air in tube before installing.
not alot just to keep it from pinching....

Answer 7

You need to protect the end of the tire iron with tape or some kind of soft cover.