fixitrod

When going down hill, You are make the pressure plate move because you are forcing the tranny to move. That makes since. But sitting at idle with the clutch pulled...The pressure plate wouldn't spin. But yes, going down hill would put pressure and spin on that ball. Worst of both world. Cruising and holding the clutch in a lot would do the same thing.

to fix it, couldn't you set the motor in a drill press and start drilling it. You could just keep a magnet handy to catch the shavings. Once you got in a little ways, it would break free.

Actually, when you hold the clutch all the way, the pressure plate doesn't spin at all. Actually, the pressure plate wouldn't start moving until the bike did. Dragging the clutch while taking off may cause the problem, but not just holding it. Or improper clutch cable adjustment. Actually, the ball is always in contact with the pressure plate and gets the most relief when pulled. The spring from the "push lever" keeps tension on it at all time. That ball just spins like crazy all the time. Good advice by the way.

You could use them just for the size and them design your own.

He has got to be using propane. Damn that is bad ass.

Best thing I ever did for my cooling system....really. I haven't had one bit of trouble since I moved it.

Depends, do you max the motor out or does the terrain you ride on limit you from doing so. If you max the motor out now, a head or poting would be great. If you're limited because the terrain is tough, defenitley suspension.

Have you seen his truck or snowmoshee.

I have seen a yamaha 450 walk on some banshees. It was amazing. It didn't even have an aftermarket pipe. I don't know what he did to it but it was damn fast.

***EDIT*** What I had here was already mentioned by bonnman..

Boonman, why do people come here to whine... Maybe you could add some cheese and make him happy

I think the dense air of the cold could affect it,.... never really tried to see. It makes since though. Another thing could be your rings have seated better if your other reading was not to long after a rebuild.

I just had mine done by grand river racing and wow. It's a 4mm and pulls from bottom to top. As said above, it's all about the builder and what type of riding you do. There are no magic stages of porting.

If your trying to replace the roller that's on the swingarm you should get a slider. Upp has them and they also sell the split type at www.dirtly.com so that you don't need to remove the swing-arm.

defenitley agreed. I also used an electric drill. Use the punch and drill away.

Here's your pics.

Funny thing... I grew up riding dirt bikes... I prefer thumb on an atv though. You push and pull the handlebars to much for me to have twist. I have a buddy that tried a twist and crashed three times before he decided to put the thumb back on.

I have not seen them in person and I agree. They may not be needed at all depending on riding style. Thanks for clearing up that they are close to stock volume though.

Since it is ported you will have to check with your builder on the dome size. Sounds like an air leak to me too. It could be a crank seal if everything on the outside looks good. Do a vacuum test to make sure like boonman suggested.

I agree 100%. Those things can be really fast with very simple mods.

Me too. You may need to do a little more research on your pipes. Oh, and the only set oil ratio is that set by the manufacturer of the oil. The most common being 32:1 to 40:1. Some manufacturers oil will run at 100:1. The oil is smart, not the engine. A engine is a basic machine.

What jetting are you running?

Have you checked the flywheel side to make sure your stator isn't loose or your key has sheered allowing the timing to shift. What comp and timing are you running? What elevation? What size domes? Sounds like to high of compression, lean jetting, bad fuel, or timing trouble.

It works on centrifugal force. If you look at it there are little arms that get pulled on when the rpms are up. On the other end of the are, it's like a cam. The force presses your clutch tight. Now, I've heard it can be tough to pull the clutch when under hard acceleration because you are fighting that force.

If those ideas don't work, measure your float height inside the carbs. It may be to low and causing it to run out of fuel. I think it would be an excellent idea for you to put an inline fuel filter that you can see through.