Motorcycle waveriding

http://www.wired.com/2015/08/heres-nut-surfed-motorcycle/

Reminds me of the old PlayStation game JetMoto!

Nuts!

BERK that noise!

Meh: https://youtu.be/PrIqh23h4nI

I love it. I can only imagine hanging out at the beach and seeing a dirt bike out riding a wave.

Why do I assume that this will be part of the next gymkhana video?

That is pretty freakin' cool. I wonder how many times they had to rebuild the engine from him dumping it and hydrolocking.

This actually started several years ago in SoCal when a couple of guys figured they could ride their bikes across small ponds etc if they had a paddle tire on the back and were going fast enough. The big difference: they don't use the flotation stuff this guy does. Sample video from (possibly) Russia.

https://www.youtube.com/watch?v=tOnKN75WIwc

This guy isn't actually using flotation stuff, other than an emergency inflatable bouy that's deployed to keep the bike from sinking if it actually goes into the water. This bike just has foils attached to the front and rear axles. If he came to a stop the bike would fall into the water. So it's a self-propelled water-skiing vehicle, or a paddle-powered hydroplane that doesn't float.

If you look carefully at the shot going down the river, not only does it have the 'hydrofoil' for the front wheel but there's another mounted under the bike in the center. They are too narrow to effectively make it a watercraft but they sure do make it less likely to sink quickly if the bike runs out of power/speed. The paddle tread tire makes it much less likely to 'lose traction' than a regular knobby tire.

Center 'hydrofoil' in action:

Pic of center 'hydrofoil':

There's some serious engineering going on there.

I've done many a slow crossing in water up to the bottom of the airbox (get deeper than that and hydrolock becomes a very real possibility) but never managed to pull off something like this!

Here's what happened AFTER the 'pipe'. Oops.

Hydrolock with salt water... that whole bike is junk now.

Curmudgeon wrote: Here's what happened AFTER the 'pipe'. Oops. Hydrolock with salt water... that whole bike is junk now.

Luckily Red Bull KTM has a few extra motors and money

Eh, if the Hilux can be revived after a dip so can that bike.

One the original mechainc's had posted on Reddit that after a dunk it took about 5 or so hours to dry out and they were back out and running again with minimal work. They had some sort of quick close valve on the exhaust and intake.

wearymicrobe wrote: One the original mechainc's had posted on Reddit that after a dunk it took about 5 or so hours to dry out and they were back out and running again with minimal work. They had some sort of quick close valve on the exhaust and intake.

I think it said in the article they started with a 450 4 stroke but switched to a 250 2 stroke because the 2 stroke was so much faster to disassemble, clean, and reassemble. Not to mention lighter.

In reply to rcutclif:

I would think the constant high RPM is more suitable for a 2 stroke also.

Disassembly/reassembly, yeah gimme the ringding. RPM? My 2000 WR400 redlined at 11,500 and made max HP at ~9500 RPM. The RPM difference is less than you'd think. It's also gotten to the point where the weight difference between 2 and 4 stroke bikes is something like 15-20 pounds, where it used to be 50-75. The times they are a' changin'.

Not real clear on the full dirt ridding gear; kind of hard to swim in and I don't see an PFD in sight.

It is a cool stunt.