HF 6.5 clutch? basically i need help.

[patrick824]

Hey guys,

So i havent messed around with my go kart for a couple years and just impulse bought a HF 6.5 new. I dont know much on the whole clutch, sprocket, gear ratio, governor, etc. etc. deal, so bear with me please . as far as i can tell i have a 72 tooth sprocket on the axel that is roughly 8-9 inches in diameter. my wheels are 11 inch. i do not have a chain. included are pictures. so basically i am wondering what clutch and chain to get. i am VERY tight on cash but i would like a good product (i know, tough request)... thanks so much!

sorry it was dark and i used my phone :/

 

[brendonv]

10,11 or 12t on the clutch will be fine. 10t for more acceleration but 12t will be fine. 10t will give u a 7.2:1 ratio and a 12t will give you 6:1 which is pretty standard for most karts.

 

[patrick824]

What size chain? Also I know I need a 3/4 bore, but what about the other numbers? Ex. (40,41)

 

[fowler]

id say it woiuld be 40
but dont take souly my word

 

[brendonv]

Measure ur sprocket. Its probably 35p. easiest way to check is get some 40 chain and see if it fits.

 

[patrick824]

Thanks guys, what kind of clutch should I get? I see different clutches are rated for different horse powers and I wanted to get your opinion. Thanks

 

[DustinWolfe]

i have that same exact cart frame . mine doesnt have the rear end anymore as im making it a live rear but i still have the old parts. mine came with a 3 horsepower briggs, an 11 tooth clutch and the chain is a 35p. i assume this is all the same with yours.

 

[patrick824]

That's the same engine I had too! I think I'm gonna go 10t for a little better acceleration and take advantage of 6.5... I am just worried about the fact that all of the wheels spin independently and possibly just spinning the sprocketed tire with too much accel. We will see I guess. Does anyone know of a good 10/11t clutch, #35 chain with a 3/4" bore that will support a 6.5 hp?? I have heard of these engines being modded to dish out around 20hp (not saying I'm gonna do this but I will probably try to get a few more horses... I know it's a lot to ask for but I'm kinda broke so cost efficiency is key... Thanks!!!

 

[Blazkowiez]

Its 35 chain, your basic choice for a clutch here is just a 3/4" bore 12 tooth MaxTorque or Hillard clutch, these are standard and can be found at Northern Tool, Tractor Supply, Ace Hardware, or any one of dozens of online suppliers, try not to pay more than 40 for a clutch. Have fun dude.

 

[DustinWolfe]

also i forgot to ask did yours come with a body? mine has a indy car body that bolts on to it

 

[patrick824]

Yes mine came with a shell that originally had dr. Pepper decals on it

 

[r97]

i know it's bean said but i though i would just put it all in one post,
11th item down the page sku#4041, http://www.bmikarts.com/category/Clutches-Torque-Converters-Belts-168/rec/30
a little more expensive but it includes the 10(or11) tooth sprocket for #35 chain your looking for, and it comes with mounting hardware. you will need 5 to 10 feet of #35 chain with master link and a chain tool, you will also need engine mounting bolts if you don't already have some.

 

[patrick824]

With the one you gave me the link to, I don't see if it is has a keyshaft... Does it have one?

 

[r97]

i'm sure it does, but if you'r really worried don't hesitate to e-mail bmi, they should e-mail you back later today if you get them before closing time.