1929 BMW R 63 Specifications

Name: 1929 BMW R 63
Brand: BMW

All-Round • Specs last verified 31 October 2026

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1929 BMW R 63 Overview

For 1929, BMW offers the R 63 as an all-round motorcycle with 745 cc on tap. The 1929 BMW R 63 is built around a Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder engine, a compression ratio of 6.2:1. Out on the road, the R 63 delivers 17.9 kW @ 3400 rpm of peak power. In everyday use, the 1929 R 63 tips the scales at 152 kg and carries a 12.5-litre fuel tank. That's roughly 37 kg lighter than the average all-round motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 1929 BMW R 63 spec sheet below.

1929 BMW R 63 compared with other bikes in the All-Round category

Measured against other bikes in the All-Round category in our database (up to 497 models, one entry per model), the 1929 BMW R 63 comes out as follows.

With 152 kg, the R 63 has the joint 105th lightest wet weight of 381 bikes in the All-Round category, 20% below the category average of 189 kg.
Power output of 17.9 kW is lower than that of 98 of the other 145 bikes in the All-Round category.
Only 162 of the other 496 bikes in the All-Round category have a larger engine displacement than the 745 cc of the R 63.

1929 R 63 - Pros & Cons

Strengths

Capable power output: 17.9 kW @ 3400 rpm of peak output puts the R 63 in good company among its rivals.

Considerations

Carburetor fuelling: Carburetion is more hands-on than fuel injection - plan on periodic jetting and cleaning as part of routine ownership.

Wear Points & Servicing Notes

Heat management in traffic

Air cooling on the R 63 keeps the mechanical layout simple, but heat management in slow traffic needs more attention than on a liquid-cooled bike - plan routes and gear accordingly in warmer conditions.

Carburetor maintenance

Being carbureted, the R 63 is more sensitive to stale fuel and altitude changes than a fuel-injected bike - a carb clean and rejet restores crisp throttle response after any extended lay-up.

Suspension condition on used examples

Suspension duties are handled by Plate spring, 6 laminae up front and Rigid, spring loaded saddle at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.

Frame & chassis check

The Twin loop steel tubular frame chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.

R 63 - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 1929 BMW R 63 with its 745 cc all-round should cover the same ground every time: service history, drivetrain condition, and any oil seepage around the casings. Now 97 years old, this all-round is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. Start it from cold if you can - a well-kept R 63 settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for the R 63's 745 cc four stroke, two cylinder horizontally opposed boxer, pushrod operated 2 valves per cylinder. - keep to the manufacturer's interval rather than stretching it. The sump holds 1.5 l, so budget for that volume of quality motorcycle-specific engine oil. With a 6.2:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Use the viscosity grade the manual specifies, not whatever's on sale.

Carburetor upkeep

An R 63 that's sat unused is almost always a carb-cleaning job before it runs right again - float bowls and pilot jets first, since they clog before anything else.

1929 BMW R 63 - Frequently Asked Questions

What engine does the 1929 BMW R 63 have?

The 1929 BMW R 63 uses a Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. engine with 745 cc of displacement. It is air cooled.

How much does the 1929 BMW R 63 weigh?

The 1929 BMW R 63 weighs 152 kg. This is the manufacturer's wet figure.

How much power does the 1929 BMW R 63 make?

The 1929 BMW R 63 produces 17.9 kW @ 3400 rpm of power.

What is the fuel tank capacity of the 1929 BMW R 63?

The 1929 BMW R 63 has a 12.5-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 208-250 km between stops.

What brakes does the 1929 BMW R 63 have?

The 1929 BMW R 63 uses Ø200mm Drum at the front and external shoe brake at the gearing on Cardan shaft at the rear.

What tyre sizes does the 1929 BMW R 63 use?

The 1929 BMW R 63 runs 26 x 3.5" or 19 x 3.0" or 27 x 2.75" or 21 x 2.5" front and 26 x 3.5" or 19 x 3.0" or 27 x 2.75" or 21 x 2.5" rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 1929 BMW R 63 have?

The 1929 BMW R 63 is fitted with a 3 Speed transmission.

How much oil does the 1929 BMW R 63 take?

The 1929 BMW R 63 takes 1.5 l of engine oil at a full oil and filter change. Always verify against the dipstick or sight glass after filling.

Key Specifications

Engine

Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.

Power

17.9 kW / 24 hp @ 3400 rpm

Torque

Not recorded

Top Speed

Not recorded

Weight

152 kg / 334 lb

Fuel Capacity

12.5 liters / 3.3 US gal

Full 1929 BMW R 63 Specifications

Year 1928 - 29

Make BMW

Model R 63

Make Model BMW R 63

Oil Capacity (l) 1.5 l

Oil Capacity (Quarts) 1.6 Quarts

Fuel Capacity 12.5 liters / 3.3 US gal

Wet Weight 152 kg / 334 lb

Max Power 17.9 kW / 24 hp @ 3400 rpm

Stroke 68.0 mm

Displacement 745 cc / 45.5 cu in.

Engine Detail Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.

Bore x Stroke 83 x 68 mm

Compression Ratio 6.2:1

Cooling System Air cooled

Fuel Induction 1 x Spezial 2 valve ∅24 mm carburetor

Fuel Induction 1 x Spezial 2 valve Ø24 mm carburetor

Ignition Bosch high voltage magneto ignition

Starter Kick

Chain Size Shaft

Clutch Single plate, dry

Gear Ratios 1st 2.83 / 2nd 1.55 / 3rd 1.08:1

Transmission / Drive 3 Speed

Frame Type Twin loop steel tubular frame

Suspension - Front Plate spring, 6 laminae

Suspension - Rear Rigid, spring loaded saddle

Tachometer None

Brakes - Front Ø200mm Drum

Brakes - Front ∅200mm Drum

Brakes - Rear External shoe brake at the gearing on Cardan shaft

Tyres - Front 26 x 3.5" or 19 x 3.0" or 27 x 2.75" or 21 x 2.5"

Tyres - Rear 26 x 3.5" or 19 x 3.0" or 27 x 2.75" or 21 x 2.5"

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.