J.A.P
Spares / Ersatzteile
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Valves / Ventile Engine / Motor
  Valves / Ventile
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J.A.P
V-Twin Guides
British Made James
NOS from the 1950s
Length 2 3/4 inch, Bore 8mm, Outside Dia 9/16
fits JAP Model 8/10 Twin 1000cc 1926-33
or 500cc Singles
JAP
Terrys Valve Spring Set
Genuine
Two Pairs
fits 1935-38 500cc & 600cc OHV ( Barrel shape Type )
Terrys Part No. VS 73
JAP
Valve Guides NOS
from the British Firm James
Length 2 1/4 = 57,1mm, Bore 11/32 = 8,7mm, Push fit in Head 11/16 = 17,5mm
( Inlet & Exhaust Same )
fits 1934 246cc OHV & 680cc V-Twins
JAP
Valve Guides NOS
from the British Firm James
Length 2 1/2 = 63,5mm, Bore 11/32 = 8,7mm, Push fit in Head 11/16 = 17,5mm
fits 1930 175cc, 200cc OHV
( Inlet and Exhaust same on all the following Models )
1926-28 490cc OHV, 1926-30 250cc & 346cc OHV, 1927-30 Double 680cc V-Twins
each 10,00 € Set 35,00 € Sold
each 14,00 €
each 14,00 €
 
JAP
Valve Spring Set
Genuine Terrys
two Pair
Outer Length 53,74mm, Dia 37,88mm,
4 Coils, Wire 3,33 mm
Inner Length 48,04 mm, Dia 27,06 mm,
5 Coils, Wire 2,72 mm
fits 1930-34 JAP Engines 500cc & 600cc OHV
Terrys Part No. VS 72
JAP
Valve Inlet & Exhaust
NOS British James
Head 1 3/4 = 44,5mm, Length 4 5/32 Inch = 105mm,
Stem .343 Inch = 8,71mm
fits 1935-36 JAP Engines 3 1/2 500cc OHV &
1932-36 Engine 10 HP V-Twin 500cc & 1000cc OHV
JAP
Valve Inlet & Exhaust
NOS British James
Head 1 19/23 Inch = 40,5mm, Length 4 5/32 Inch = 105mm,
Stem .281 Inch = 7,16mm, Slotted Stem
fits 1926-32 JAP Engines 2 1/4 & 2 3/4 250cc & 346cc SV
JAP
Valve
Exhaust Material
British Made NOS from the 1950s
Groove Cotter Recess
Head Dia 49mm, Shaft 8,7mm, total Length 117mm
ideal for Machining ( I.E. JAP Motors, BSA etc. )
Set 35,00 € each Sold
each 20,00 €
Sold
each 24,00 €
each 15,00 €
 
JAP
Exhaust Valve
NOS British James ( 3438 )
Head 1 3/4 = 44,5mm, Stem .405 = 10,48mm, Length 4 5/32 = 105,6mm
fits 1935-42 OHV 500cc Models
JAP Part No. 12225
JAP
Inlet & Exhaust Valve
NOS British James ( 3436 )
Head 1 9/16 = 39,68mm, Stem .346 = 8,71mm, Length 3 31/32 = 100,8
( thin Cotter Groove )
fits 1932-36 350cc OHV Models
JAP
Exhaust Valve
NOS Genuine Jap ( stamped )
Head 1 9/16 = 39,8mm, Stem .343 = 8,71mm, Length 96,8mm
fits 1930s Models, Type unknown
JAP
Inlet & Exhaust Valve
British James ( 3435 )
Head 1 3/8 = 34,9mm, Stem .343 = 8,71mm, Length 3 15/16 = 100 mm
fits 1933-36 250cc 2 1/4 OHV
25,00 € each 24,00 € 25,00 € 25,00 €
   
JAP
Valve & Guide
NOS Genuine JAP ( stamped )
slotted Stem Type
Measures of Valve
Head 1 1/2 = 38mm, Stem .315 = 8,1mm, End to End Length 102mm
Measures of Guide
Length 2 7/16 = 61,9mm, Bore 9/32 = 7,1mm
Push in Head Fit 1/2 Inch = 12,7mm
fits possibly 1926-28 350cc SV
and other 1920s Models
JAP
Inlet & Exhaust Valve
NOS British James ( 345 )
slotted Stem
Head 1 5/16 = 33,3mm, Stem .281 = 7,14mm, Length 3 7/8 = 98,4mm
( Stem has some slight Storage Marks )
few in Stock
fits 1923-28 2 1/4 & 2 3/4 300cc & 349cc SV
also fits 1922-33 680cc SV V-Twins 5/6 ( Brough )
   
Pair 60,00 € 20,00 €    
  Engine / Motor
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J.A.P
Cylinder and Piston
Standard Bore Size 62.5mm
Hepolite Piston Part No. 4678
( Piston Pin badly pitted )
Genuine NOS
Rebored with new Piston,
but has some storage marks
Rust pit marks at base of bore
( Approx one inch from Base )
Piston has a few faint score marks
no broken Fins all perfect
Bead blasted, Primer coated
fits 1934-35 250cc OHV
Single or two Port Engines
J.A.P
Piston
Genuine NOS
( Hepolite Matching No 3316 )
Bore 3 3/8 Inch = 85.725 mm Std Size
Complete with Gudgeon Pin and Piston Rings
fits 1928-30 500cc OHV Engines
J.A.P
Piston
Genuine NOS
Asso Italian Racing Speedway Piston
Bore 79.93 mm Dia
with Two Comp Rings + Pin Clips
no Oil Rings fitted, Gudgeon Pin missing ( Type 17mm Dia )
High Comp 12 to 1 ?? ( Alcohol ? )
J.A.P
Piston
Genuine NOS
Asso Italian Racing Speedway Piston
Bore 80.43 mm Dia
with Two Comp Rings + Pin Clips
no Oil Rings fitted, Gudgeon Pin missing ( Type 17mm Dia )
High Comp 12 to 1, ?? ( Alcohol ? )
Sold
200,00 €
Sold
100,00 €
50,00 € 50,00 €
 
   
JAP
Piston
British Hepolite NOS
Standard Bore Size 62.5mm
Hepolite Part No 1383
( Piston is Standard size and complete )
fits 1924-32 JAP Motor 250cc OHV, 2 Port, High Comp
JAP
Piston
British Hepolite NOS
Standard Bore Size 79.983mm + 030 Thou oversize
Complete Piston
fits JAP Motors 824cc 55B, 55, 55C, 55CB
Air Cooled 2 Cyl Industrial Engine
   
75,00 € 50,00 €