No problemo, Roostmonkey!

I appreciate your experience, winding your dirtbike out on those long flats.

A motorcycle, unlike a quad (or automobile), GAINS stability at speed. Thus, I'm a little concerned about the stability and handling characteristics of a quad at extreme speed.

A stock 300EX chassis may handle 90 mph with no problem; I only asked.

Tree Farmer

 

Tree Farmer, I can tell you from years of experience that an ATC250r is suprisingly stable at 90+ MPH when on a frozen lake and the bike is studded out and especially when it is lowered. Don't ask me why but my friends and I all have this burning desire to go as fast as possible across frozen water despite the fact it has no practical use. There are no sanctioned events to do this within 500 miles of us yet we continue to push new boundaries of speed every winter. By the way they are pretty stable on smooth sand fire roads at near triple digit speeds too. Therefore I'd imagine a four wheeler would be more stable at these speeds that our trikes. The four wheeler is certainly more stable than us maniacs who ride at these speeds.

 

Good questions Tree Farmer! As for the first comment i know you meant no harm, but my dad did not just throw this thing in the frame, he and I worked diligently at designing and producing this quad. As for where i ride? i live in northern Iowa, near a small town, there is about a 2 mile strip of blacktop that i top my bike out at. Plenty of room! I am not goig to be dodging cats and dogs all the time, there really isnt anything to dodge, or not yet at least! When talking about the brakes. I really dont need to slam them on, i pull lightly. they may get warm but not burn up. Every thing is fine the quad is good, i am good. happy riding!

Ranger

 

How did you dampen the vibrations? I only ask because every CR500 conversion I have heard of or encountered had serious vibration problems. The problem seems to stem from the lack of a crankshaft counter balancer. From what I have heard, in a dirt bike the lack of a counter balancer is not noticeable. When placed in an ATV chassis however, the frame layout and design tend to amplify the vibrations greatly. Please share the secret to your success with us.

The danger with running ATV tires at high speeds on pavement is that they just are not designed for it. By nature ATV tires have very soft sidewalls and are operated at a very low air pressure. When run at higher speeds for long distances, tires with the aforementioned qualities, whether for atv's or automobiles develop a wrinkle in the sidewall similar to the ones you see when a drag car leave the line. This continuos wrinkle will cause the tire to heat up, in turn resulting in a blow out. How far could you go on yours before this will happen on your quad? Most likely farther than a mile or two, but I would not want to be the one to test it. I’m not trying to discourage you from testing the limits of your machine; I’m only encouraging you to be careful when you do it. :-)

Eric Zeh


[This message has been edited by Eric Zeh (edited 12-15-1999).]

[This message has been edited by Eric Zeh (edited 12-15-1999).]

 

I don't know Erik, I have gone for 3 or 4 miles at 85-90 on my 250r but that was on the ice and that would reduce the heat problem. If you run a tire like a cheng shin knobby that we use on the ice you can ride it flat and not even notice except for a little pull towards the flat tire's side, the tire doesn't actually go flat. I agree though that the average atv tire is not suited for this type of riding at all.

 

John, I believe you are correct, ice would make a big difference. Not only would the ice cool the tire but unlike pavement it would also permit the tire to slip. He may be able to run on pavement for 3-4 miles or maybe 100 miles before it showed any ill effects. It would be really hard to tell what the magic number would be, as there are so many variables to consider.

 

No doubt. When the effects do start showing it probably would be with disasterous results. I've seen ads for putting 155r12 car radials on the front of quads, I'm sure one could set up something for the rear too, maybe some of the Hoosier flattrack tires.

 

Explain to all of us, how you set up the exhaust system. As we all know, the pipe of a 2 stroke is a key factor in its performance. You may have a 500cc turd under you, and not even know it.

 

i would like to add my point on the tire subject. i often run my banshee at its top speed in excess of 5-10 miles at my buddy's farm. i have never noticed any tire problems.


tony
'97 banshee

 

RangerSX, I noticed that you are from northern Iowa. Well I am from Rochester, MN.
I am very interested in seeing and most of all riding this beast that you have assembled. I am in the process of building a 300EX up myself. Not with a CR500 motor, but something that may surprise 400EX riders.
Here's my e-mail. chris.j.stark@wdc.com

Drop me a line if your interested in hooking up.

Chris 00' 300EX