Brakes are different for all karts. On our karts we use basic hydraulic systems, some with both front brakes and rear brakes. You will need to see what kind of mounts you have for a master cylinder and as well as if you have a disc brake hub and caliper. The most common easy to set-up standalone system is a kit made by MCP that is easy to find on most karting websites.

This is still a nice engine stock. running with a completely stock with a hilliard extreme duty clutch with do approximately 45-55 MPH based on gearing. When we first started last year we kept them stock to keep reliability up. Once we decided to start racing them that is when we decided to mill the head a hundred thousandths and do some other easy mods such as making an exhaust header and aftermarket muffler and new intake adapter with a cheap filter on it. With this set-up we are running 55mph

I will be taking more detailed pictures in the next couple days and be posting them on that thread.

You can check out pfmparts. com to see the products we carry for the engine, as well as kartcommunity. com to see some more info we have gathered on the 420cc. Thank you for your interest!

It is just a single speed centrifugal clutch. We don't use any type of transmission because there is simply no room on a racing kart. If this engine where to go onto a larger kart, say a yard kart then a torque converter box would be used with multiple speeds. Since racing karts are so light there is no need for multiple speeds. The engine has plenty of torque down low to pull the kart up to speed.

We haven't gone as far as cc'ing the combustion chambers, head gasket thicknesses, etc to find the true static compression ratios yet. That's something that we will be doing here in the off season.

This is the predator 420cc from Harbor freight modified for racing.

Sorry I am just now seeing this. Yes, this is the 390 clone. The official name is 420cc Predator engine soled bay harbor freight.

We are partners with a company called PFM. They have fabricated and produced most of the 420cc custom parts. pfmparts .com (without the space). The drive-shaft is 1" so you will need a clutch with a 1" bore. Options are limited when it comes to clutches. We use either the Hilliard extreme duty or the Noram Star clutch. I have just posted a new thread on kartcommunity about our mods with links to parts. View the link the in description

Where did you get the centripical clutch? What size is the bore coming off the engine stock out of the box? Can you maybe make a video of your set up on the go kart and list all the parts and where you got them from. It would be very helpful me and my friend want to see your set up

I was thinkin of buying this engine for my new homemade gokart and i want it to achieve a speed of at least 60mph

Thanks, what kind of transmission do you have in it? How many speeds?

Ok thanks what do you use for brakes that is the only thing i cant quite figure out where to get them and how to install

What is the static compression ratio when milled .100"?

is this the 390 clone, what is the name of it?

What kind of modifications did you do