Bore sizes of Driven clutches?

[Matisse27]

Here is a quick overview of my first project.

My over all goal:
Able to go up dirt logging roads at a top speed of 25 mph or 35 miles per hour on the flats giver or take.

My Specs so far:
Engine: 13 HP Predator (420cc) OHV Horizontal Shaft Gas Engine

Driver Clutch: Comet 40 Series Driver Clutch / 1" BORE

Wheels: Honda c90 knock offs (something like this)

Jackshaft: Don't know which would be best, yet.

Gear Ratio: 7:1???

Overall weight: Cart + two passengers (350 lbs) = No idea what total weight will be.

We have been saving our penny's and finally reached the point that we can afford the Torque Converters (clutch).
I have questions before we make the big purchase and haven't been able to find the answers

Why do Driven clutches have different bores?
I'm looking at a Symmetrical Driven Pulley (7-37/64" Outer Diameter).
One haves a 5/8" bore, a 3/4" bore and a 7/8" bore.

Why on Earth is the 5/8" bore more expensive?

Whats the standard bore size for a Driven Clutch?


Based off my specs, should I buy the 7/8" bore?

Thank you in advance for your words of wisdom.

 

[itsid]

More important : based off your specs.. you should buy different wheels!

Honestly, motorcycle wheels are great.. for motorcycles.. on karts you better build very lightweight in order to not bend the rim on the first corner..
offroad...
I don't think that's a good plan at all.
350lbs in passengers alone... uhm... nope!

Also, for a wheel diameter that large... 7:1 will not work very well!

Now, finally to your question..
whatever fit's your jackshaft will do.

a 3/4" will suffice I'd say, a bit more meat on the jackshaft (7/8") won't harm..
so just see what size JS (& bearings / pillow blocks) you can get more easily and go from there.

'sid

 

[Matisse27]

Thanks a bunch 'sid. We will rethink the wheels.


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[Denny]

Your wheels are fine. Check out cyclekarts they use those wheels all the time.

Denny

 

[Matisse27]

Sweet. Thanks Denny


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[itsid]

that's correct cyclekarts use those wheels all the time (well.. at least most of the time)

BUT cyclekarts are lightweight , single seaters and not meant for offroading ... so
I'll still go with: use different wheels;
or you'll find yourself spending what.. 600 bucks eek: ebay can't be right about that) for a set of wheels that needs to be replaced within a month or less.

'sid