Post your Kart Jackshaft Setup Pics

[babzog]

Hey folks,

Looking to get ideas on how I could integrate a jackshaft onto an old racing kart. I'm interested in increasing the ground clearance (wheels and sprocket) and it's been suggested I employ one of these... problem is, I'm not sure how I can integrate it onto the kart. Being a track kart, the engine is beside the driver and there's very little room beside and behind to build, let alone handle the sprocket offsets required for the two drive chains (one from engine to JS, the other from JS to axle). Hoping to get some good ideas, so please, post those pics!

 

[anderkart]

This link has a bunch of jackshaft pics: http://www.google.com/search?q=Burr....,cf.osb&fp=78b0dac83eb40bb1&biw=1024&bih=556

These are exspencive, but Burris makes a motor mount for racekarts like yours with a built in jackshaft:
More info here: https://id3528.securedata.net/test.burrisracing.com/merchantmanager/product_info.php?products_id=372

Here's one installed on a kart like yours:

 

[DaiSan76]

You should be able to do something like this. It bolts right onto the engine block.

 

[Badot]

You should be able to do something like this. It bolts right onto the engine block.

I like the idea, but how happy would the threads/bolts/crankcase cover be if you made a real torque monster like that? Or the bearing that holds the jackshaft straight.

 

[OzFab]

Here is mine. Keep in mind these particular parts may be hard to get, but it gives you an idea of how little space is needed

 

[DaiSan76]

I like the idea, but how happy would the threads/bolts/crankcase cover be if you made a real torque monster like that? Or the bearing that holds the jackshaft straight.

I wouldn't think it would put much stress on the engine. They are designed to be bolted onto things using that crank case cover, maybe one of the smart people will chime in on that.

 

[jamyers]

Fabroman, that's one well-supported jackshaft - I like it!

 

[island]

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[babzog]

How well do engines (ie: the Honda gx140) like being mounted on an incline as with the Burris mount? How well would I it oil? How would you determine the oil level?

 

[landuse]

Here is a pic of mine. It is on a minibike though

 

[anderkart]

How well do engines (ie: the Honda gx140) like being mounted on an incline as with the Burris mount? How well would I it oil?

How would you determine the oil level?

These engines lube just fine with 15-degree motormounts, most kart racers would use a measuring cup to pour in somewhere between 16 and 22 ounces of oil, but they race on mostly flat tracks... I know you'll be riding off road, so if you'll be riding up/down steep hills or mountains, I'd suggest you post a thread here: http://karting.4cycle.com/forumdisplay.php?f=72 explain the situation and see if they have any advice for you.

 

[babzog]

The kids won't be hitting any hills other than the hump in the gravel laneway so I guess it'll be okay.

 

[oldbikerarlo]

here's a cheap jackshaft. It's made with wheel bearing, a pipe nipple, and 5/8 rod.

 

[landuse]

here's a cheap jackshaft. It's made with wheel bearing, a pipe nipple, and 5/8 rod.

How would that work?? For some reason I just cannot imagine it

 

[island]

here's a cheap jackshaft. It's made with wheel bearing, a pipe nipple, and 5/8 rod.

Thanks You just save me a couple $ on my chinese quad project

 

[jamyers]

How would that work?? For some reason I just cannot imagine it

Use muffler U-bolt clamps to hold the 'bearing housing' (pipe) down, and the gears (or a spacer) would need to go up against the bearings to keep them in the pipe.

The hard part would be to get the gears fixed solidly to the shaft. You could weld them to the shaft, but there goes the ability to replace bearings. You could get gears with set-screws to grip the shaft, but I wouldn't rely on just that. My money would be on using a cut-off wheel to grind some keyway slots and using gears with keyways and set-screws.

 

[island]

Was going threw my junk and notice my rusted out riding mower deck had jackshafts

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[landuse]

Use muffler U-bolt clamps to hold the 'bearing housing' (pipe) down, and the gears (or a spacer) would need to go up against the bearings to keep them in the pipe.

The hard part would be to get the gears fixed solidly to the shaft. You could weld them to the shaft, but there goes the ability to replace bearings. You could get gears with set-screws to grip the shaft, but I wouldn't rely on just that. My money would be on using a cut-off wheel to grind some keyway slots and using gears with keyways and set-screws.

Stupid me. I see it now. Thats a good idea.

 

[OzFab]

Fabroman, that's one well-supported jackshaft - I like it!

Thanks jam... and it's fully adjustable