PROX Carburettor Rebuild Kit for YAMAHA YZ 125 1999-2000

The PROX 55.10532 carburettor rebuild kit is designed for YAMAHA YZ 125 from 1999 to 2000. Over time and with today's fuels, the carburettor's seals harden and the float needle wears: the carburettor leaks, the float bowl overflows and the carburation becomes unstable. This kit brings the carburettor back to its original condition.

Key features

• NBR O-rings that resist the ethanol in today's fuels.
• Float bowl gasket in Interface material instead of the stock paper gasket, depending on the model.
• Jets in stock sizes, needle and seat depending on the model, fuel screw and small hardware.

Specifications

• Brand: PROX
• Manufacturer part number: 55.10532
• Weight: 50 g
• Engine: 2-stroke

When to replace it?

• Fuel running out of the overflow, float bowl overflowing.
• Unstable idle, hard starting, carburation that keeps changing.
• Hardened seals or a seeping float bowl.

When bringing a bike back into service after it has stood unused for a long time, during a full carburettor clean, or as soon as a leak appears.

Fitting tips

1. Strip and clean the carburettor (cleaning bath, compressed air), noting the original settings: float height, number of turns on the fuel screw.
2. Replace all the gaskets and O-rings in the kit, without reusing the old ones.
3. Set the float height according to the manual.
4. Reassemble, then set the idle and the fuel screw with the engine warm; check the colour of the spark plug after a few rides.

Why PROX?

Founded in 1975 and based near Amsterdam, ProX specialises in engine and clutch wear parts for off-road bikes. The brand has most of its range made in Japan, by OEM suppliers, for quality on a par with the original parts.

Spare parts and items to plan

• Spark plug : NGK 3530 · NGK 3230
• Air filter : TECNIUM · HIFLO FILTRO
• Air filter oil : TWIN AIR 500 ml · POLINI

Frequently asked questions

Does the kit change the jetting?
No: the jets supplied are the original sizes for your bike.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
YAMAHA YZ 125 2000
YAMAHA YZ 125 1999