TECHNICAL SPECIFICATIONS

Jawa 42 Bobber (Europa)

42 Bobber EU

334 cc

MotorDataBook

Key specifications

The essentials of this version at a glance.

412.26 lb
Kerb/curb weight
✓
3.3 US gal
Fuel tank capacity
✓
100/90-18
Front tyre size
✓
140/70-17
Rear tyre size
✓
10W-50
Engine oil viscosity
✓
1.32 US qt
Engine oil capacity with filter
✓
JASO MA-2
Engine oil specification
✓
MOTUL INUGEL EXPERT
Coolant specification
✓
7 items

Dimensions & Weights

Length
85.91 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Width
32.95 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Height
42.87 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Wheelbase
58.46 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Ground clearance
5.67 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Kerb/curb weight Con el 90 % de combustible y las herramientas, según el manual.
412.26 lb ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Fuel tank capacity
3.3 US gal ✓
El manual da la capacidad con una tolerancia de ±0,2 L.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
1 items

Brakes

Brake fluid specification
DOT 4 ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 16 Verification: Verified Open document
4 items

Wheels and tyres

Front tyre size
100/90-18 ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 16 Verification: Verified Open document
Rear tyre size
140/70-17 ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 16 Verification: Verified Open document
Front tyre pressure - normal load Con el conductor solo (en frío).
27.02 psi ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
Rear tyre pressure - normal load Con el conductor solo (en frío).
29.86 psi ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
4 items

Motorcycle Specific

Drive chain slack minimum
0.98 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Drive chain slack maximum
1.18 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 18 Verification: Verified Open document
Front axle torque
55.32 – 59 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 68 Verification: Verified Open document
Rear axle torque
55.32 – 59 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 63 Verification: Verified Open document
5 items

Engine & Fluids

Engine oil viscosity
10W-50 ✓
El manual recomienda dos productos (Motul H-Tech 100 4T y Castrol), ambos 10W-50.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 14 Verification: Verified Open document
Engine oil specification
JASO MA-2 ✓
Norma que acompaña al producto Castrol recomendado por el manual.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 14 Verification: Verified Open document
Engine oil capacity with filter Cambio de aceite con cambio del filtro de aceite.
1.32 US qt ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 52 Verification: Verified Open document
Coolant specification
MOTUL INUGEL EXPERT ✓
Producto recomendado por el manual (también Castrol Redicool HD premezclado); no da una norma.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 15 Verification: Verified Open document
Coolant capacity
1.06 US qt ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 15 Verification: Verified Open document
2 items

Filters & Service Parts

OEM spark plug reference
UR 3CP30 ✓
Marca Bosch según el manual.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 14 Verification: Verified Open document
Spark plug gap
0.03 – 0.03 in ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 14 Verification: Verified Open document
6 items

Lighting

Low beam bulb
16,5 W / 21,5 W LED ✓
El manual da las dos potencias del faro (LED) sin indicar cuál es cruce y cuál carretera.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
High beam bulb
16,5 W / 21,5 W LED ✓
El manual da las dos potencias del faro (LED) sin indicar cuál es cruce y cuál carretera.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
Front indicator bulb
1,8 W ✓
Intermitentes LED; el manual da una única potencia para todos.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
Rear indicator bulb
1,8 W ✓
Intermitentes LED; el manual da una única potencia para todos.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
Brake light bulb
2,3 W LED ✓
Segunda potencia de «Koncové světlo / brzdové světlo» (piloto trasero/luz de freno), LED.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
Number plate bulb
0,54 W ✓
Luz de matrícula LED, según el manual.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 17 Verification: Verified Open document
2 items

Torque Specifications

Engine oil drain plug torque
14.75 lb-ft ✓
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 52 Verification: Verified Open document
Oil filter torque
8.11 lb-ft ✓
Par de los tornillos de la tapa del filtro de aceite, según el manual.
Sources and verification (1)
Primary source ✓ Official Publisher: Jawa Moto (jawa.eu) Document: 42 Bobber: návod k obsluze (manual del propietario, checo) Reference: PDF p. 52 Verification: Verified Open document

How we handle technical data

MotorDataBook prioritises official documentation and shows conditions, notes and traceability whenever a figure needs context. Unconfirmed values should not be presented as facts.