I was hoping you guys could give me a little more help for my homebrew frame project.

What size and guage is the tubing used on the following quads?
Honda 400EX
Honda TRX250R
Yamaha Banshee
Any Other Performance Oriented Quad

I am trying to get an overall idea of a good size to use when I start my project. I know the 250R had square tubing instead of the round tubing used by the others.

Most quads I have looked at (but not measured) appear to be constructed of approximately 1" tubing, but again, I haven't actually measured one. Dealers get curious and nervous when you start measuring frame dimensions in their store and I don't know anyone personally who has any of the above quads.

The size, or O.D. (outside diameter), should be easy to measure, but I realize the guage of the tubing isn't so easy to get unless there is an exposed end to a length of tubing. Whatever information you can get for me I would very much appreciate.

 

wrong,,the 250R used round tubing,, the 400ex uses square, that's the difference between the two frames.

 

Oops...sorry. Like I said, with no local Honda dealership and not knowing anyone who has one personally... I am quite sure someone told me the other way around though.

 

Wrong. 400EX uses round tubing and the R uses square tubing.

 

no man, all of honda's new sport and highpo machines use squared tubing,, you can find thousands of pictures of R's on the net,, they all have round tubin, and at least every 400ex i've seen has square tubin.

 

awww crap,,, i juss realized that i been sayin the wrong thing,,, i dunno what made me say that the 250r had the round tubin, and i dunno what made me get so deffinsive about it,,, i know that the 400ex has the round tubin cause i modded one last fall for a 426 engine,,, geez,, sorry guys,, sorry for the confusion, i musta juss been a little outa my head, and sorry need4speed, didnt mean to get all antsy about it, i still dunno what i was thinkin... sheesh, sorry....

 

After posting my reply yesterday, I went back to all the chassis pictures I have collected for review and ta-da! It was as I originally said! I knew I wasn't crazy...at least not in this respect. But, I appreciate your responses anyway.

Now, about the size of that tubing?

 

Go to some of the aftermarket frame makers websites and call or E-Mail them, but instead of saying what you're doing, say your comparing different frames and want all the specs on the metals/size/gauge and then make your decision from there, because if you say you're building your own chassis they'll probably laugh and hang up on you. Good luck. Maybe you should post in the honda forum about the sizes also. Oh yea, Lone Star's site., I would give you more but thats all I know.