How do you calculate the gear ratio of a jackshaft?
The formula is to divide the J/S In by the Engine and divide Axle by the J/S Out and multiply the two to get the final ratio. Engine = Clutch Sprocket. J/S In = 20, 24 or 28 tooth input sprocket.
Does my go kart need a jackshaft?
To reiterate, racing go-karts do not require a jackshaft, as they’re laid out in a way to facilitate the alignment between the crankshaft and the axle by the use of two sprockets and a chain (or a torque converter or clutch).
How do I know what gear ratio for my go kart?
To determine your gear ratio, simply divide the rear axle sprocket by the clutch sprocket, so in the case of the above example, 60 divided by 12.
What’s the purpose of a jackshaft?
A jackshaft, also called a countershaft, is a common mechanical design component used to transfer or synchronize rotational force in a machine. A jackshaft is often just a short stub with supporting bearings on the ends and two pulleys, gears, or cranks attached to it.
What is a Jackshaft kit?
Jackshaft Kits allow you to put a lot shorter gear on the kart than is typically possible with just an engine sprocket and rear axle sprocket. Best used for extremely small tracks.
What is a jackshaft kit?
Is a torque converter better than a centrifugal clutch?
As torque converters handle low torque ranges more easily, they’re most commonly used on off-road go-karts. They perform better at lower speeds and are ideal for stop-and-go situations. Clutches on the other hand are snappier and perform better at high speeds.
How many teeth should my go-kart sprocket have?
The sprocket on the engine and the one on the rear axle should have a ratio close to 1:6. This means for every tooth on the clutch there are six teeth on the rear sprocket. So if you count 10 teeth on the clutch there should be 60 teeth on the rear sprocket. (12 teeth on the clutch means a 72 teeth rear sprocket).
What does a jack shaft do for a go kart?
A jack shaft will increase or decrease your gear ratio depending on the arrangement of the gears. Most often, it increases it for more power, less speed. The shaft has 3/16in. keyway. Comes with 10 and a 14-tooth sprockets which take #40 size drive chain. Mounting hardware: two standard 3/4in. I.D. bearings with hangers and a 3/4in. I.D. collar.
How can I find the best gear ratio for my Go Kart?
You can also use the go-kart speed calculator and work backwards to find the optimal gear ratio. This means that you can look at the desired speed you are aiming for and adjust the sliders on the sprockets to determine which gear ratio you should go for. Be sure to enable the jackshaft feature if you’re running a jackshaft on your kart.
Do you have to change the clutch on a go kart?
Go karts are more likely to change only the clutch sprocket or final drive sprocket. Before you consider your go kart’s gearing, it’s important to understand the simplest ratios of gearing.
What should the top speed of a go kart be?
When using a clutch to drive your go kart the top speed on flat terrain is 35mph, if the terrain is hilly or the weight of the driver is high the top speed should be 25mph. Mini bikes work best with a top speed of 25mph for all terrain.