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Hi, I recently just got my project kart running but I have been having some concerns with how gas is leaking from behind the carb where the "carb insulator block" (black plastic piece behind the carb) is. I just replaced all the gaskets with new gaskets, including the float bowl o-ring. I...

When I go to paint my kart, I'm going to be using Rustoleum 2X paint & primer over top of Rustoleum self-etching primer. Do I actually need a clear coat? How much protection does it really provide? I want to be able to touch up the paint easily to repair scratches or if I ever needed to grind...

I'm currently building a full suspension mini-buggy/go-kart (full build thread is on my profile). My steering system is comprised of a standard go-kart steering shaft, two steering links, and then obviously the spindles (see picture below). All the pivot points in the steering are either heim...

We all know the benefits of electric motors and how they deliver their power. Electric motors can put out their max torque at zero RPM, while gas engines' ratings are their max at a specific RPM, yada, yada, yada. But I've heard the saying that 1 electric horsepower is *rougly* equivalent to...

I've been doing some research and debating between using the 80V Greenworks/Kobalt power tool packs in parallel or going with RC LiPos. I've seen quite a few go-kart/minibike builds using LiPos, and only one guy out there seems to use the Greenworks packs. My only fear regarding LiPos is the...

I'm currently tuning my steering system in a custom mini-buggy. Right now the steering is almost a 1:1 ratio with TONS of steering angle, but you can't even turn the wheel unless the buggy is moving since the steering is so tight. I'm thinking about dropping the steering ratio down to a 1.5:1 at...

Has anyone here tried using power tool/mower batteries to power a go kart? I'm talking about the 80V 5AH packs from Greenworks/Kobalt. I've seen some builds online using them but nobody here seems to mention them. I feel like it makes sense. I mean, most of us here are using lawn...

I've found it quite difficult to find a singular battery pack that meets the requirements for my plan. My idea is to run two battery packs in parallel, which I have seen done before on Youtube but I'm unsure of the logistics. How do you run two battery packs (each with their own BMS) in parallel...

I need a very specifically sized rear axle that isn't sold by any go kart parts stores. I have a 54" axle (actual usable axle length is 50", but with 2" of threads on each side), and I need a 45" axle. My idea is to cut one of the sides of the 54" axle off and weld the one wheel hub in place...

Curious as to how long to make the arms on my spindles for a good balance of steering angle/leverage. My setup is a 3(?)" pitman arm going to a double sided lever that has tie rod holes 2" from center on each side (see pic below). How long should I make my spindle arm?

Looking at paint options for my project and I want to go with a rattle-can paint and primer mix. Rustoleum and Duplicolor are what I'm seeing reccomended a lot. What should I go with? From what I hear Rustoleum is thicker and has better rust protection while Duplicolor is finer and has better...

I recently bought some pre-made shock mounts for my custom build. These shock mounts are identical to what you would find on a Yerf Dog. They are made of 1/8" thick metal, which seems sorta thin to me. Should I make my own out of thicker material or will these be fine. This is an off road buggy...

Just curious what kind of voltage requirements a kill switch needs. I'm planning on using a push button style switch meant for a boat horn, so it's rated for 12v. Will that work? All it has to do is ground the ignition coil. This is on a Duromax 440 for reference.

I have a Duromax 440cc with a stock cam and 50lb valve springs. A lot of aftermarket cams have hardened lobes, but since this is the original cam I am slightly concerned. Will I be ok? If the cam does wear I have two spare stock cams for big blocks.

Would running 2 calipers off of one master cylinder make the brakes less effective? I'm planning on running MCP brakes right now (the master cylinder has two lines coming out of it, 1 for each piston of which there are two per caliper). My question is if I added a T to each line and just ran...

Doing some research for my current build and I have a question. Is a shorter chain weaker? I'm figuring out rear suspension designs and I have an option of either running a swingarm with the engine mounted to it (simple, only needs 1 chain, but not great for jumps) or running a jackshaft so the...

I've been having an odd problem with my Duromax 440. The engine has a stage 1 kit, billet rod/flywheel, and no governor. The engine idles just fine but will stall once any throttle is applied. However, if I open the throttle by manually moving the butterfly on the carb (little black piece on top...

Anybody notice that it's near impossible to find any store selling the big block engines (420,440, etc)? Every Harbor Freight in literally a 40 mile radius from my house is out of stock on the 420ccs, and even Amazon is out of stock on the Duromax 440ccs. I found a few lesser-known brands like...

I have a 420cc hemi head laying around and I'm thinking about getting a Duromax 440. Will the 420 head work on a 440? The difference is the 440 has a 92mm piston while the 420 has a 90mm. But the head gasket I have says it works for either 90mm or 92mm. Could this work?

I have a 420 Predator that tries to rip the pullcord out of my hand when starting it. The plastic handle actually just broke from the kickback. After asking around it seems the valve lash is the only possible issue after ruling out the keyway being sheared. Here's my question: Should I set the...