What clutch do we need ?

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kokines

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Firefox 620 go kart the boys put a new engine 8 hp tecumah need the right clutch



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bob58o

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How big are the tires and how many teeth on the rear sprocket? And yes, you will need to tell us the pitch of the rear sprocket. 3/8" (#35) or 1/2" (#41, #40, or #420)? And the engine shaft size.

---------- Post added at 12:53 AM ---------- Previous post was at 12:34 AM ----------

Guessing 60 teeth and 18" Tires and 1/2" Pitch with a 1" crankshaft

So a 1" bore, 10T, #41/#40/#420 clutch (if my assumptions are correct).
Something like this for flat riding
http://www.gopowersports.com/10t-1-bore-centrifugal-clutch/

Or maybe this 1" 30 series TC? Is that a real thing?
Will probably be an issue to mount the TC tho. Maybe Lifting the engine, removing the gas tank,.... Ask GaryQuick how difficult it was for him. LOL
http://www.ebay.com/itm/GO-KART-TOR...MS-/252796200710?_trksid=p2385738.m2548.l4275
The Torque Coverter is a better option than a Cent.Clutch. Big Tires and CC's don't mix very well.
 

bob58o

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Maybe its the angle, but it looks like there may be some clearance issues...?

The more I look at it, the more it looks like a TC backplate would fit. It has a skinny motor mount so it should clear that. No frame in the back to worry about. Just maybe kick the axle sprocket a tad over towards the driver side wheel if needed. The rear sprocket and chain may ride next to the backplate for a bit.

I'm not sure. It may fit easily, it may be a difficult task.

But first he has to answer our questions about his engine and buggy.
 

kokines

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It is a 1 inch shaft chain is a 40 I will have to get boys to count teeth on sprocket
this is the clutch they tried the plate is to short had clearance issues and holes wouldn't line up😣


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mart2439

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Can someone send me a pic of the brake Master Cylinder location for the Firefox 620?
 
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