Parts mainly for Speed 25 & 4.3, but some also suitable for other Speed models. All parts are good used condition & serviceable unless otherwise stated. Images available for most items by WhatsApp (preferred) or email. Prices are for collection in person or by your courier from Kingston Upon Thames. Postage at cost.
Engine
1. Set 6 new old stock Sp25 Hepworth pistons 83mm + .5mm Incl. rings & Gudgeon pins. Flat top & compression height 55mm - £200.
2. Set 6 used pistons 92mm for 4.3 incl. Gudgeon pins & rings. Flat top & compression height 65mm, total length 108mm - £150.
3. 6 new old stock gudgeon pins. Length 2 7/8", diameter 22mm with chamfer for pinch bolts - £30
4. Aluminium timing chain covers (fit between crankcase & bellhousing). VGC - £350
5. 2 rocker shafts with minimal wear. Both believed to be Sp25, 1 with rocker feed holes at approx. 110 degrees (with spring wear marks), the other with feed holes at 180 degrees - this shaft also has an additional feed hole for overhead oil spray? - £300 each.
6. Valve rocker positioning/return springs, 2 sets plus 21 spring spacers 1/8" thick - £30 per set
7. 7 of rocker shaft screw in end pieces - £5 each
8. Aluminium engine cooling fan assembly. 4 blade aluminium fan & 6-hole mounting arm. Excellent original condition. Part no.N17007 (Sp20 SC/D?) - £400
9. Sp25 camshaft - £400
10. 4.3 camshaft. Some wear on oil pump drive gear & inner 2 bearings show some ridging, otherwise serviceable - £250
11. 2 of rear camshaft bearings. 30mm bore good condition. Believe suitable for Sp20, Firefly & Silver Eagle F & G - £30 each
12. 1 front camshaft bearing c/w end cap & spring etc. Part No. N5539 - £30
13. 3 of cam chain spockets (Sp25 & others), 2 with 2 woodruff key slots - £20 each
14. 7 of Sp25/4.3 cam followers VGC - £25 each
15. 12 cam follower guides. 10 in VGC & 2 with broken thread at top but useable. VGC -£15 each other 2 £5 each
16. 10 of cam followers, used but with minimal wear - £20 each
17. Cam chain tensioner assembly c/w sprocket, spring & ratchet, but no locating shaft - £200
18. Cam chain tensioner sprocket plus eccentric bearing housing, no spring or ratchet - £100
19. Cam chain sprocket only (for tensioner assembly) - £25
20. 7 of camshaft front bearing bronze end float spacer plus 3 corresponding springs - £5 each
21. Oil pump c/w drive gear, outlet casting & oil pipe end. Part no.N14973 - £250
22. Engine sump oil level float & sender unit (bolts to sump). Untested - £50
23. Crankcase oil filler cap. Bolt swivel hole broken but useable - £5
24. Water pump, complete but end of outlet pipe corroded - £15
25. 3 of Sp25/4.3 inlet manifolds for cylinderhead. 1 3/8" to 1 7/16" - £120
26. Lucas C5HVBU dynamo, complete but untested - £100
27. Auxiliary drive shaft bearing housing. 3 hole mounting & fits between crankcase & magneto support housing. Requires new bearing - £30
28. Bronze auxiliary drive shaft bearing support. Holds bearing for sprocket (24 tooth sprocket & splined drive included). Mounting bolts at 1 7/16". Part No.N13544 needs new bearing - £25
29. 3 of auxiliary shaft drive sprockets, 16 teeth & 15mm shaft bore. 2 in good condition £10 each, 1 worn teeth free
30. 1 of auxiliary shaft drive sprocket with 19mm shaft, worn teeth - free
31. BTH JD6 magneto parts - request image for details
32. 6 of advance/retard operating levers (clamp to stator tube) - £5 each
33. 3 of crankshaft end nut locking plate - £5 each
34. 11 of Sp25 push rod adjustment ends - £15
35. 55 of Alvis valve cotters - £20 per set (24) or part (23)
36. Lucas dynamo C5A1 Type BU 0. Unknown condition but appears complete apart from brushes cover & brushes, believe fitted to Sp20 SA & SB plus Firefly - £50
37. 3/8" BSF block to crankcase studs. 2" length with 3/8 & 3/4" threads (14 required for Sp25 or 4.3) - £4 each/£50 per set
38. 1 of crankshaft starting handle 'dog' - £20
39. 48 of (4 sets) 7/16" BSF high tensile big end bolts (2 sets with
Engine
1. Set 6 new old stock Sp25 Hepworth pistons 83mm + .5mm Incl. rings & Gudgeon pins. Flat top & compression height 55mm - £200.
2. Set 6 used pistons 92mm for 4.3 incl. Gudgeon pins & rings. Flat top & compression height 65mm, total length 108mm - £150.
3. 6 new old stock gudgeon pins. Length 2 7/8", diameter 22mm with chamfer for pinch bolts - £30
4. Aluminium timing chain covers (fit between crankcase & bellhousing). VGC - £350
5. 2 rocker shafts with minimal wear. Both believed to be Sp25, 1 with rocker feed holes at approx. 110 degrees (with spring wear marks), the other with feed holes at 180 degrees - this shaft also has an additional feed hole for overhead oil spray? - £300 each.
6. Valve rocker positioning/return springs, 2 sets plus 21 spring spacers 1/8" thick - £30 per set
7. 7 of rocker shaft screw in end pieces - £5 each
8. Aluminium engine cooling fan assembly. 4 blade aluminium fan & 6-hole mounting arm. Excellent original condition. Part no.N17007 (Sp20 SC/D?) - £400
9. Sp25 camshaft - £400
10. 4.3 camshaft. Some wear on oil pump drive gear & inner 2 bearings show some ridging, otherwise serviceable - £250
11. 2 of rear camshaft bearings. 30mm bore good condition. Believe suitable for Sp20, Firefly & Silver Eagle F & G - £30 each
12. 1 front camshaft bearing c/w end cap & spring etc. Part No. N5539 - £30
13. 3 of cam chain spockets (Sp25 & others), 2 with 2 woodruff key slots - £20 each
14. 7 of Sp25/4.3 cam followers VGC - £25 each
15. 12 cam follower guides. 10 in VGC & 2 with broken thread at top but useable. VGC -£15 each other 2 £5 each
16. 10 of cam followers, used but with minimal wear - £20 each
17. Cam chain tensioner assembly c/w sprocket, spring & ratchet, but no locating shaft - £200
18. Cam chain tensioner sprocket plus eccentric bearing housing, no spring or ratchet - £100
19. Cam chain sprocket only (for tensioner assembly) - £25
20. 7 of camshaft front bearing bronze end float spacer plus 3 corresponding springs - £5 each
21. Oil pump c/w drive gear, outlet casting & oil pipe end. Part no.N14973 - £250
22. Engine sump oil level float & sender unit (bolts to sump). Untested - £50
23. Crankcase oil filler cap. Bolt swivel hole broken but useable - £5
24. Water pump, complete but end of outlet pipe corroded - £15
25. 3 of Sp25/4.3 inlet manifolds for cylinderhead. 1 3/8" to 1 7/16" - £120
26. Lucas C5HVBU dynamo, complete but untested - £100
27. Auxiliary drive shaft bearing housing. 3 hole mounting & fits between crankcase & magneto support housing. Requires new bearing - £30
28. Bronze auxiliary drive shaft bearing support. Holds bearing for sprocket (24 tooth sprocket & splined drive included). Mounting bolts at 1 7/16". Part No.N13544 needs new bearing - £25
29. 3 of auxiliary shaft drive sprockets, 16 teeth & 15mm shaft bore. 2 in good condition £10 each, 1 worn teeth free
30. 1 of auxiliary shaft drive sprocket with 19mm shaft, worn teeth - free
31. BTH JD6 magneto parts - request image for details
32. 6 of advance/retard operating levers (clamp to stator tube) - £5 each
33. 3 of crankshaft end nut locking plate - £5 each
34. 11 of Sp25 push rod adjustment ends - £15
35. 55 of Alvis valve cotters - £20 per set (24) or part (23)
36. Lucas dynamo C5A1 Type BU 0. Unknown condition but appears complete apart from brushes cover & brushes, believe fitted to Sp20 SA & SB plus Firefly - £50
37. 3/8" BSF block to crankcase studs. 2" length with 3/8 & 3/4" threads (14 required for Sp25 or 4.3) - £4 each/£50 per set
38. 1 of crankshaft starting handle 'dog' - £20
39. 48 of (4 sets) 7/16" BSF high tensile big end bolts (2 sets with
0