First go kart project

[gsegovia]

yes, they're just honda clones. easy to find parts for. the 420cc Predator is a great kart motor for the price. whatever you do DON'T get the Duromax 420cc motor, it is NOT go-kart friendly without modifying it!

still, if youre gonna drop $600 on a motor and clutch - consider getting a snowmobile instead! soooo much power, and really quite easy to rip the motor mount out and weld it to the kart (if there's room on the kart). my 56hp 480cc demo buggy is running on a 1" keyed axle, with no problems yet! just be sure to use #50 sprockets and chain.

I did some searching on the snowmobile yesterday couldn't find anything, but the engine and torque converter now got put of till next month since it tripled the budget. The guy that has the greyhound never repliedso am gonna pick up the 13hp predator. But I have to wait.

 

[gsegovia]

So it comes down to the fact that a 6.5 hp with torque converter will not be enough for this size go kart. The only reason I considered the 6.5 was because a local shop said it would be good for this size kart.

 

[mysteryboy28]

So it comes down to the fact that a 6.5 hp with torque converter will not be enough for this size go kart. The only reason I considered the 6.5 was because a local shop said it would be good for this size kart.

with the 212cc motor it will have no balls. those are good for small lightweight kid karts. the 420cc motor will MOVE the kart, especially with the right gear ratio. a 7:1 ratio would be a good starting point (70 tooth axle sprocket, 10 tooth clutch sprocket) for plenty of torque, and decent speed.

 

[gsegovia]

Sounds good, ill be returing the 212 then.. and getting the 13hp

 

[gsegovia]

with the 212cc motor it will have no balls. those are good for small lightweight kid karts. the 420cc motor will MOVE the kart, especially with the right gear ratio. a 7:1 ratio would be a good starting point (70 tooth axle sprocket, 10 tooth clutch sprocket) for plenty of torque, and decent speed.

So what kind of speed should I see with the 420cc

 

[mysteryboy28]

depends on your gear ratio and tire size. what are those numbers?

go here and punch those numbers in. standard max rpm is 3600 rpm (i easily get 7000 rpm out of snowmobile 2-stroke motors, but they're a totally different beast than an industrial 4-stroke motor).

http://www.diygokarts.com/speed-calculator.html

you can easily mod the engine for higher RPMs, but i wouldn't go higher than about 4400 rpm (piston rod or flywheel can go kablewy!). i replaced the governor/throttle spring (the long one) with a piece of coat hanger. that way the governor couldn't back off the throttle when it went beyond 3600 rpm.

 

[gsegovia]

So I did some research on the bigger engine, and comes down to the fact that a 13hp is to wide for my frame, it measures over 18in from the end of the shaft to the opposite side where you pull start it. The shaft will hang past the frame. Meaning that's there's no way possible I would have rim for a torque converter.

 

[gsegovia]

Even with the 346cc predator it measures 16 1/2 in. The frame measures 17 in wide. The only way am gonna fit anything bigger is going to be if I modify the frame. Am trying to avoid. Especially since I don't own a welder machine. I'll post some pictures

 

[gsegovia]

here are the pic

 

[mysteryboy28]

Even with the 346cc predator it measures 16 1/2 in. The frame measures 17 in wide. The only way am gonna fit anything bigger is going to be if I modify the frame. Am trying to avoid. Especially since I don't own a welder machine. I'll post some pictures

simple solution: buy a big piece of 8"x4" square tube (or similar, maybe 10 inches long - as long as the bolt holes will line up on the frame and the motor, and have room to reach inside and tighten the bolts) and bolt it to the current engine mount, then bolt the motor to that. looks like you'll have plenty of clearance for the motor then. be sure to use locking washers, locking nuts, and some blue #242 loctite.

 

[gsegovia]

So I got a good of the guy with the greyhound 11hp engine now he made me a deal 250$ for the engine and a yerf dog kart. So I might take it.

 

[gsegovia]

How good are the yerf dog

 

[OzFab]

simple solution: buy a big piece of 8"x4" square tube (or similar, maybe 10 inches long - as long as the bolt holes will line up on the frame and the motor, and have room to reach inside and tighten the bolts) and bolt it to the current engine mount, then bolt the motor to that. looks like you'll have plenty of clearance for the motor then. be sure to use locking washers, locking nuts, and some blue #242 loctite.

Great idea. Set up properly (ie: weld the bolts in place) it will work well. The only downside is it raises the COG slightly

So I got a good of the guy with the greyhound 11hp engine now he made me a deal 250$ for the engine and a yerf dog kart. So I might take it.

That sounds like a good deal.

On a side note, the 346cc predator would fit & do the same job

 

[gsegovia]

That's why am buying this one, it comes with a new 11 hp greyhound. Hopefully it's good

 

[gsegovia]

model ?

I know this is a yerf dog but is there a way to tell which model it is. Thanks
http://db.tt/bzO2X99Q

 

[landuse]

I know this is a yerf dog but is there a way to tell which model it is. Thanks
http://db.tt/bzO2X99Q

Not sure of the model, but cruise around on the Yerf Dog website and see if you can ID it from one of their pics

 

[gsegovia]

Am picking up the Kart and engine this afternoon, ill see what I can find. Thanks

 

[gsegovia]

So I got the turf dog and engine. Now I don't know if to build the turf dog or keep with what we started. What do y'all think

 

[gsegovia]

One thing the guy said was that when they put the first bit won't on the turf dog the frame would bind to much and the engine world hit on the back of the seat. Is there any reinforcement that needs to be done to ruin a bigger engine on the turf dogs. Thanks.

 

[gsegovia]

Btw all along I meant to say yerf dog not turf dog. Sorry