4-Stroke 50–125cc ATV Carburettor with Manual Choke – Complete Ready-to-Fit Kit
Is your engine struggling to start on cold mornings? Is your idle speed erratic? Or perhaps your old carburettor has finally given up after seasons of heavy off-road use? Whatever the issue, this 4-stroke ATV carburettor arrives as a complete, ready-to-install package. We have included the air filter, gaskets, and adjustment shims, so you can get back on the trail without needing to hunt for extra parts.
Note: Before ordering, please ensure your engine intake manifold has a 19mm diameter and a 48mm bolt hole spacing (centre-to-centre). These two measurements are essential to confirm direct compatibility.
Why choose this carburettor? (Key Benefits):
- Complete kit, no surprises — includes a 35mm air filter, mounting clamp, adjustment shims, and rubber gasket; everything you need in one box.
- Integrated manual choke — ensures easy starting even in cold weather without needing extra accessories; the lever is mounted directly on the carburettor for immediate access.
- Versatile compatibility — designed for 49cc, 50cc, 70cc, 90cc, 110cc, and 125cc 4-stroke engines; a universal solution for most small-displacement ATVs, pit bikes, and quads.
- Standardised dimensions for a direct fit — the 19mm intake and 48mm bolt spacing allow for a seamless installation onto your original manifold without modifications.
- Fine-tune your mixture — includes adjustment shims for the piston needle, allowing you to calibrate the fuel-air mixture for different altitudes or temperatures.
Technical Specifications and Performance
This carburettor body is precision-engineered for small-displacement 4-stroke single-cylinder engines, where even a millimetre of difference in the intake port can affect performance and air leaks. The 19mm intake diameter ensures optimal airflow velocity at low and mid-range RPMs, which is ideal for these engine sizes. The manual choke allows you to enrich the mixture for cold starts without relying on handlebar-mounted cables, making it perfect for vehicles where the original cable is missing or damaged.
| Parameter | Specification |
|---|---|
| Engine Type | 4-stroke, single-cylinder |
| Compatible Capacities | 49cc, 50cc, 70cc, 90cc, 110cc, 125cc |
| Engine Intake Diameter | 19 mm |
| Air Filter Mount Diameter | 35 mm |
| Bolt Hole Spacing | 48 mm (centre-to-centre) |
| Choke Type | Manual, body-integrated |
| Applications | ATV, Quad, Go-kart, Pit bike, Dirt bike |
Installation and Tuning Guide
- Verify that your engine intake manifold has a 19mm diameter and 48mm bolt spacing before opening the package.
- Mount the carburettor onto the intake manifold and tighten the bolts evenly in a cross pattern to ensure a perfect seal.
- Attach the 35mm air filter to the intake using the included clamp, tightening it until secure.
- Connect your choke cable if applicable, or simply use the manual lever on the carburettor body.
- To adjust the mixture: add a shim under the needle for a richer mixture (useful for high altitudes or cold weather), or remove a shim for a leaner mixture.
- Adjust the idle screw until the engine runs smoothly without fluctuating.
- For cold starts, engage the choke fully. After 1–2 minutes of warming up, gradually disengage it.
Package Contents
- 1 x Carburettor with integrated manual choke
- 1 x 35mm Air filter
- 1 x Air filter mounting clamp
- 2 x Piston needle adjustment shims
- 1 x Rubber intake gasket
Frequently Asked Questions
Will this work on a 125cc ATV with a 1P52FMI engine?
Yes, in the vast majority of cases. The 1P52FMI engine and its variants typically feature the 19mm intake and 48mm bolt spacing required for this carburettor. Please double-check your specific engine setup before ordering, especially if it has been modified.
Is this compatible with 2-stroke engines?
No. This carburettor is designed exclusively for 4-stroke engines. 2-stroke engines require a different fuel circuit design.
Is the included air filter suitable for heavy off-roading?
The included filter is a standard unit suitable for general use and moderate terrain. If you frequently ride in dusty or muddy conditions, we recommend upgrading to a foam sport filter for better engine protection.
How do I know if I need a new carburettor or just a clean?
Cleaning can often resolve clogged jets. However, if the engine still struggles to start, runs erratically, or leaks fuel after a thorough cleaning, replacing the unit is the most reliable and cost-effective solution.
Is the included gasket enough for installation?
The package includes the necessary rubber O-ring for the intake port. If your manifold uses a flat flange, you may require an additional flat gasket, which is widely available at any local motor parts shop.
Photo Gallery
Reviews
There are no reviews yet.