IMPORTANT JAP V-TWIN ENGINES AND PARTS FOR SALE

8/80 Dry Sump JAP replica

Most parts for an 8/80 Dry Sump engine as built by Terry Wright for the Walton JAP. This is similar to the 8/80 JAP engine of 996cc that was originally used by Bruce Walton when he built his car in 1952. Some machining required. Perfect for Morgans or Coopers.

£8750 plus shipping from Sydney

Inclusions

Barrel castings, aluminium, unmachined (2)
Cylinder liners included but not shown. Noel Street lightweight speedway pattern, with large fins suit 1949 8/80 JAP twin

Crankcase
Castings, three pieces, timing cover only part machined, complete with driveside main bearing housing

Crankshaft, complete (2)
Custom made for TW by S&S complete with JAP mainshafts

Heads, aluminium, machined (2)
Very good improved reproduction, designed and made by John Thease. Suits 8/80 JAP with both forward exhausts, complete with valve seats fitted. 

Pistons c/w pins and rings (2)
Accralite, 2 x 88mm 2 new, 2 used for pattern 

Camshafts,  gears, followers (2)
Ivan Tighe camshafts complete with special profile, lift and dwell, designed and made for TW

Valves, exhaust and inlet (4)
G&S valves custom made for TW with 7mm dia stem 

Valve springs, caps retainers (4)
Porsche Carrera, lightly used, to suit the G&S 7mm valves with retainers and caps.

Rockers boxes, spring covers (2)
Original speedway parts with new castings for covers need machining, some rocker levers

Pushrods (4)
New, ex US, custom, to TW specification

Cam followers (4)
Ex Bill Tuer steel castings unmachined complete with machining jig and fixtures, speedway rollers to buy or make

Oil pump
Ewan Cameron make , new

Drawings and specifications
JAP factory drawings and design details as used by TW in Walton Special

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Near complete original 1949/50 JAP 8/80 dry sump engine JTOSZ/S/50860/1 as used in early Coopers

8/80 JAP twin JTOSZ/S/50860/1 rare dry sump type (recirculating oil) engine most likely built for first Cooper twins in 1949. Complete new pressed up flywheel assembly with rods by Carillo .Timing cover casting and some minor machining required to JAP drawings supplied. Original Amal carburettors and magnetos included. The iron JAP speedway heads were first used by Coopers in 1948 with iron barrels then through 1949 with aluminium barrels before the introduction of the Mk1 engine in early 1950 with a new design of aluminium head and a sump added to the crankcase. Perfect for Morgans or Coopers.

£9550 plus shipping from Sydney

Click on images to enlarge

Inclusions

Engine set, of major parts for early Cooper and late Morgan racing engine.

Crankshaft custom made and balanced by S&S with new Carillo rods all by Greg Summerton.

Original hairpin valve springs.

Pistons by Accralite. Camshafts custom made by Ivan Tighe.

Cylinders require liners fitting (supplied) for supplied new Mahle +20 thou pistons. Timing cover requires machining to JAP drawings included.

Includes 2 off BTH magnetos and 2 off Amal type 27 track carburettors.

Correct original oil pump. New Mahle pistons. Original hairpin valve springs.

Cylinder head, rocker boxes and Amal 27/013 carbs need reconditioning

New oil pump by Ewan Cameron.

One camwheel needs new shaft; timing cover casting need machining.

Rocker boxes and Amal 27/013 carbs need restoration.

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Complete original 1950/1 JAP Mk1 engine JTORZ/W/H76206

£13,500

  • Believed ex Dave Shotton and serviced  by Phil Spencer (UK), complete with carbs and magnetos, may be ready to use.
  • Crated as delivered UK to AU.
  • Ready to ship ‘as is’ with reassembly of custom crate.  Complete with original carburettors and magnetos.
  • 1950 or 1951 manufacture.
  • Very rare complete original condition engine. Perfect for Morgans or Coopers.

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Cylinder heads and barrels

£300 pair heads
£250 pair barrels

SOLD

  • Barrel castings, twin pair aluminium, unmachined. 
  • Heads, aluminium, improved speedway style of castings ex Neil Street, with large fins ready to machine as required. Fully machined by John Thease, complete with loose valve seats, exhaust nuts and pipe collar. 
  • For single cylinder engine or 8/80 twin with forward facing exhausts. 
  • Cylinder liners available from Speedway Services UK.

Cylinder heads and barrels

£300 pair heads
£250 pair barrels

Barrel and head castings, aluminium LM25TF

SOLD

  • Barrel castings, Mk1 JAP twin pair aluminium, cast by MLC Castings UK
  • Heads, aluminium, MK1 JAP twin pair cast by Per Hageman Norway

Miscellaneous spare parts

Click on images to enlarge

Ring Sets & Pistons

  • Ring sets inc oil scraper, set 3 – £50 (Qty: 3)
  • Rings standard, set 2 pair – £50 (Qty: 2 pairs)
  • Rings +10 thou, set 2 pair – £50 (Qty: 2 pairs)
  • Piston bare, side valve JAP part 6204/2, standard, bare – $25 (Qty: 1)
  • Cosworth forgings for Greenwood 84S piston plus rings, no pins or clips – $50 (Qty: 3)
  • Mahle speedway piston complete in box, +20 thou, new – £100 (Qty: 1)
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Barrels

  • Used 4 stud barrel, 153mm long between faces – £50 (Qty: 1)
  • Used 4 stud barrel, 161mm long between faces – £50 (Qty: 1)
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Valve Components

  • Used hairpin valve springs for 2 valves (set 4 springs for one head) – £25 (Qty: 2)
  • Used valve spring covers, valve set – £13 each (Qty: 5)
  • New valve guides (3 bronze, 3 iron) – £13 each (Qty: 3)
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Timing Pinions

  • New timing pinion standard, -30, -15, -10 – £13 each (Various available)
  • Used timing pinions -30, -15, -10, standard – £13 each (Various available)
  • SOLD

Rocker & Camshaft Parts

  • Used rocker box castings with cover – £60 each (Qty: 2)
  • New camshaft bushes, long – £13 each (Qty: 9)
  • New camshaft bushes, short – £13 each (Qty: 6)
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