Spare Parts and Accessories for Yamaha BW's 50

Our online shop offers high-quality spare parts and accessories for Yamaha BW's to maintain, restore, repair, or tune your scooter. Fast shipping and very affordable prices are guaranteed.

Engine Parts for BW 50 Yamaha

The Yamaha BW's features the widely used vertical Minarelli engine with an air-cooled 50cc cylinder. Maintenance and tuning parts are easy to find.

• Manufacturer original parts: Yamaha and Minarelli OEM parts
• OEM quality engine parts and standard replacement parts: replica pistons, gasket sets, spark plugs, V-belts, various bearings, and more
• Sport and racing components: 50cc and 70cc cylinder kits, reinforced crankshafts, sport variators, inner rotor ignitions, racing exhausts, and more

Our top brands include Motoforce, Stage6, Malossi, Polini, Airsal, Top Performances, and many others.

Chassis and Fairing Parts BW's 50

• Fairing parts, headlights, taillights, handlebars, steering column, seat, seat cover, speedometer, and more. You can replace the complete bodywork if you want.
• Brake shoes, brake discs, and brake pads, fork and shock absorbers, headset bearings, engine mounts: everything required for chassis repair.

Frequently Asked Questions:

Which tires are needed for the BW's and what is the correct tire pressure?

Tire sizes should always match the original dimensions. This ensures compliance with manufacturer specifications, passing vehicle inspections without issues, and accurate speedometer readings.

Standard fitment is typically a 120/90-10 tire at the front and a 130/90-10 tire at the rear.

Tire pressure should be checked when tires are cold. A pressure of 1.5 to 1.8 bar is recommended for the front, while up to 2.1 bar is possible for the rear.

How fast does a Yamaha BW's 50 go?

In stock, restricted condition, the scooter does not exceed the legal limit of 45 km/h. Derestricting the exhaust and removing the variator restrictor ring allows speeds of up to 70 km/h. Higher speeds require tuning parts such as cylinder kits, sport or racing exhausts, variators, and ignitions.

A full race engine build can reach a top speed of over 120 km/h.

Which spark plug is suitable?

All versions require spark plugs with a short M14 thread. The heat range depends on the engine setup: stock engines run fine on an NGK B7HS or equivalent. Lightly tuned engines require a colder plug such as a B8HS, while full racing engines can run a B9HS.

Which 2-stroke oil is suitable?

The choice depends on the engine: stock setups require semi-synthetic 2-stroke oil. Tuned engines require full synthetic oil, and racing setups should use high-grade racing oil.

How can a Yamaha BW's be tuned and how does it affect street legality?

The Minarelli engine is a great base for upgrades and modifications. Power output can be increased by several horsepower, or the engine can be converted into a full race engine using high-end racing parts. The chassis can also be upgraded with improved suspension components and brakes. However, all these modifications void the street-legal status of the 50cc scooter. Once derestricted, passing a technical inspection is no longer possible. Insurance coverage may also be denied in the event of an accident if an expert detects modifications.

What are the differences between the BW's Original, Naked, and Easy versions, as well as the 12-inch wheel models?

Here is a brief overview:

• BW's Original is the most common version, equipped with 10-inch rims, handlebar fairing, a front disc brake, and a rear drum brake.
• Easy version: introduced in 2004 as a budget-friendly model featuring a front drum brake instead of a disc brake.
• Naked version: also introduced in 2004, recognized by downhill handlebars and a digital speedometer.
• 12-inch wheel version: factory-fitted with 12-inch rims from the Spy model, making it quite rare from the factory.

How can the model year and version be identified before ordering spare parts?

This page covers models produced up to 2004, which feature a small headlight, a "mustache" trim on the front fairing/front fender, and a taillight with integrated turn signals. Models from 2004 onward feature a large clear headlight, omit the "mustache" trim, and have turn signals fully separated from the taillight and mounted on the sides of the mudguard.

Another distinguishing feature of older models: early BW's featured a front drum brake, an upside-down fork, and rims with round holes, covering model years 1990 to 1994. Later versions switched to a front disc brake, conventional telescopic fork, and 6-spoke rims.

Clutch setups also differ: up to 1998, the engine featured a 2-shoe clutch with a 105 mm inner diameter clutch bell. During 1998, Minarelli switched to a 3-shoe clutch with a 107 mm inner diameter clutch bell.

Which carburetors or exhausts will fit?

Dellorto PHBN carburetors fit the original intake manifold. The appropriate size must be selected, with 12 mm being standard for stock setups, and jets must be adjusted to match the configuration. Numerous compatible exhausts are available. Selecting the specific model in the configurator displays the full range of matching products.