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Old 06-01-2011, 10:39 PM
Big Slappy Big Slappy is offline
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Default First Build - 11 hp Yerf-dog upgrade

Hey guys I've had a 6 hp tecumseh yerf dog kart for years and I've built and rebuilt small engines a hobby so I decided I'd make my own kart.

I got the frame and suspension from an old kart for 50$.

The 11 hp briggs and stratton engine I got for 50 bucks as well. Starter was bad so i had to buy a new one. (100 bucks ) No throttle setup, no gas tank, didn't run right, etc.




I cut the old engine mounting plates out and placed a piece of quarter inch steel diamond plate. I figured the jackshaft needed more reinforcement from the added torque of the big engine, so I welded a piece of the steel plate where I could mount another bearing hanger for extra support. This way, I have 4 wheel bearings and 2 level mounts for the 3/4" jackshaft.





I decided to go with a comet 40 series torque converter setup with a 10 tooth sprocket on the jack-shaft and the 60 tooth that was already on the frame.




I had an old 5 gallon air compressor bottle as the only option for a gas tank, already retro-fitted with a gas cap, so I decided to use it even though it's massive.


Here's pics and a video of the final kart. One vid is from the driver's seat, it's not to good because im getting thrown around, this kart's pretty quick =P
These pics are before all the wiring and final touches were done, including the starter switch. The video does show the final setup though. I have yet to paint it and whatnot.





VIDEOS:

Vid 1
Vid 2
Vid 3





Total price on the build was about 650 bucks, since the torque converter and jackshaft kit cost about 350. I was able to get the kart up to 35 miles per hour on the street. It is meant mainly as an off road kart, and it is stock governed.

By the way yes, the gas tank's mounted too high, too big, possibility of tipping, etc., etc., blah blah blah I know. If I find another small tank I'll probably put it on there. But for now just know that on a full tank I can go forever and that's awesome =P

Comments, questions, criticisms, are appreciated =)

Cheers
  #2  
Old 06-02-2011, 04:15 PM
Gator Gator is offline
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looks like a fun kart!

whats all the springs for on the rear?

You could go 6 months without putting gas in it
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Old 06-02-2011, 06:18 PM
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Bluethunder3320 Bluethunder3320 is offline
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Gator, looks like his throttle return spring.

No governor? Cool, be careful! I had to rebuild a 8hp briggs flatty that threw a rod.
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Old 06-02-2011, 08:35 PM
Big Slappy Big Slappy is offline
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yeah it's governed haha, that's why I can only go 35 MPH =P
And yes Gator it is the throttle return spring! I have quite an interesting throttle setup.

I just found out today the steering linkage couldn't handle the bumps and whatnot and the ball bearing keeps popping out leaving me without steering, so I have to figure out how to replace that so it doesn't happen again, especially at high speeds.
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Old 06-04-2011, 09:50 AM
Big Slappy Big Slappy is offline
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does anyone have pics of their steering linkage setup for maybe a similar kart? Doesn't have to be but it'd be more useful;
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Old 06-04-2011, 10:10 AM
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redsox985 redsox985 is offline
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What bearing keeps popping out? One in the front wheel hub?
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Old 06-05-2011, 01:39 PM
Big Slappy Big Slappy is offline
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the ball joint that comes off of the steering rod and connects to the hub

http://www.desertkarts.com/item126307.ctlg
Like this one, I was considering getting something else to avoid it popping out again but this is super cheap and might replace it.

Something like this is better but more expensive
http://www.gopowersports.com/rodend.aspx
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Old 06-06-2011, 02:28 AM
Diesel_mech85 Diesel_mech85 is offline
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Try getting some little rose joint / heim joints with hole right through. Then with bolt on top or even add a washer and it shouldn't come off. Even a normal Clevis would work. May e try putting yours together and giving it squeeze/ tap with a hammer each side or put it in a vice to tighten it up a bit, but not so much that it's tight to move
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Old 06-06-2011, 06:09 AM
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Ghanem Ghanem is offline
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Nice Kart but paint the tank it will be better
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Old 06-06-2011, 01:36 PM
Big Slappy Big Slappy is offline
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Quote:
Originally Posted by Ghanem View Post
Nice Kart but paint the tank it will be better
paint will come later, my sister wants to do it haha

at Diesel -
The ball is coming out of the socket, not the thread part of the joint falling out. I'm not sure if we are talking about the same thing.

But I'm gonna try and squeeze it to be tighter
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