This looks like more fun than just a bout anything I've ever seen ...

[patooyee]

Custom Long Travel Insane Jumps and Hill Climb!

Custom Long Travel Buggy Jump!

Its got a Honda motorcycle motor, it must weigh like 2 lbs. This will be the next rig I build and I'm towing it to the trails with my 4-cyl Tacoma!

 

[coony278]

looks like some of those landings hurt . But does look fun.

 

[TacomaJD]

I watched that a couple weeks ago, def looks like a FUN little hell raising machine!

I don't know what it is, but sounds like it geared too high, that motor should make plenty of power to where as fast as he's blowing through the rpm's, he should be picking up much more speed. he went through like 3rd gear a couple times..... Idk, just seems like he should've been moving on faster. I know it prolly weighs twice as much or even a little more than the 400 lb wet weight sportbike it came out of, but still...looks like he was spinning alot too, so maybe that's it. still looks fun as hell though. Wish there were some dunes nearby :****:

 

[CheapJ7]

Best vid i found

http://www.youtube.com/watch?feature=player_embedded&v=EGFxMpKgpgc#!

 

[patooyee]

I don't know what it is, but sounds like it geared too high, that motor should make plenty of power to where as fast as he's blowing through the rpm's, he should be picking up much more speed. he went through like 3rd gear a couple times..... Idk, just seems like he should've been moving on faster. I know it prolly weighs twice as much or even a little more than the 400 lb wet weight sportbike it came out of, but still...looks like he was spinning alot too, so maybe that's it. still looks fun as hell though. Wish there were some dunes nearby :****:

I don't think he's using the bike trans. In fact, I'm almost certain of it since he has a reverse gear. The drive shafts that go to the rear wheels are just single u-joint driveshafts, not CV's. I saw some build pics of it and it looks like he is driving some sort of transaxle off the crankshaft of the engine via chain. This being the case he can probably regear easily. But those engines also rev to like 14,000 rpm or something stupid like that, so I think some of it may be just our 5000 rpm ears not understanding 14,000 rpm. There are other videos of him picking up speed and they look like his limitation is space. But most of his vids are in small areas where acceleration is probably more important than top speed.

 

[johneddie]

Freakin awesome!!! :****:

 

[TacomaJD]

I don't think he's using the bike trans. In fact, I'm almost certain of it since he has a reverse gear. The drive shafts that go to the rear wheels are just single u-joint driveshafts, not CV's. I saw some build pics of it and it looks like he is driving some sort of transaxle off the crankshaft of the engine via chain. This being the case he can probably regear easily. But those engines also rev to like 14,000 rpm or something stupid like that, so I think some of it may be just our 5000 rpm ears not understanding 14,000 rpm. There are other videos of him picking up speed and they look like his limitation is space. But most of his vids are in small areas where acceleration is probably more important than top speed.

My ears are tuned more for 14000 rpms than 5000 rpms, you know I'm a motorcycle man! lol That's what I'm saying, with such a wide rpm range he's covering and running through 3 gears, he isn't performing like I would think it would. Maybe the gear ratios in whatever tranny he's using is geared really low. I think I said geared "high" in my earlier post, hopefully you understood I meant low geared lol. High number = low gears...I get corn-fused sometimes. My Kawi ZX-10R 1000cc that I wrecked would do 90 mph at rpm redline in 1st gear. total of 6 gears with top speed of 190 in 6th gear....pretty much stock. Wide rpm range is why sport bike engines are able to be so quick on acceleration and also have badass top speed. I think it's bc he's spinning quite a bit though, he's roosting that sand pretty good the more I watch it. If he were on a surface like asphalt with tires that hook up and go, that thing probably would take off like I'm thinking it should do. Either way, I'd like to spend a few hours driving that hog!

 

[patooyee]

My ears are tuned more for 14000 rpms than 5000 rpms, you know I'm a motorcycle man! lol That's what I'm saying, with such a wide rpm range he's covering and running through 3 gears, he isn't performing like I would think it would. Maybe the gear ratios in whatever tranny he's using is geared really low. I think I said geared "high" in my earlier post, hopefully you understood I meant low geared lol. High number = low gears...I get corn-fused sometimes. My Kawi ZX-10R 1000cc that I wrecked would do 90 mph at rpm redline in 1st gear. total of 6 gears with top speed of 190 in 6th gear....pretty much stock. Wide rpm range is why sport bike engines are able to be so quick on acceleration and also have badass top speed. I think it's bc he's spinning quite a bit though, he's roosting that sand pretty good the more I watch it. If he were on a surface like asphalt with tires that hook up and go, that thing probably would take off like I'm thinking it should do. Either way, I'd like to spend a few hours driving that hog!

I did forget you're a bike guy. I can't find the vid I saw with the chain drive pic, it was very brief. But the sprag on the engine I would estimate to have been maybe 3 - 4" dia. and the one on the trans maybe 12 - 15", so he's probably in the 3:1 - 5:1 reduction range before the trans even has anything to say about it. Plus, I think the gear boxes at the wheel they use on those things sometimes have reduction also. I liked his FB page and messaged him asking for better build pics. I'll share them if he links me to any. Not sure how great his English will be.

 

[patooyee]

This thread may explain the transaxle: http://www.minibuggy.net/forum/driveline/15354-honda-transmission.html

In the vid I saw the transaxle did look like a Honda transaxle with the gears being in a housing above and the outputs being below.

 

[vidio1]

http://www.minibuggy.net/forum/show-off-your-toys-here/9891-my-custom-long-travel-mini-buggy.html

This is one of his earlier posts on that site, I've been a member for years. The link you posted was about using a Honda FWD transaxle as a cheap(ish) reverse gearbox. It's been done a few times, but with limited success. Basically there are only 2 brands that hold up to liter bike engines, RPM and Jeffco. It looks like he's just running a cassette though. It's basically just a jackshaft to gain clearance.......