OMI Viperhead - OS.91SX/SZ This head has been designed to help you obtain maximum performance from your OS.91 Engine. The Viperhead dual glow plug version is a high compression head which accomplishes 6 things.1. Increases Power, 2. Better Cooling, 3.Improves Combustion, 4.Smaller Size for ease of installation, 5. Improves Sound, 6. Eliminates unwanted dead engine autos. Price: £76.59 £89.99 Including VAT at 17.5%
OMI Viperhead - YS.91ST This head has been designed to help you obtain maximum performance from your YS.91 Engine. The Viperhead dual glow plug version is a high compression head which accomplishes 6 things.1. Increases Power, 2. Better Cooling, 3.Improves Combustion, 4.Smaller Size for ease of installation, 5. Improves Sound, 6. Eliminates unwanted dead engine autos. Price: £76.59 £89.99 Including VAT at 17.5%
22681953 : Nipple No.1 Nipple No.1 Price: £1.28 £1.50 Including VAT at 17.5%
26731002 : Ball Race (F) - 40-61/70S/91S Ballrace Front for the OS.40-61/70S/91S Price: £7.65 £8.99 Including VAT at 17.5%
27006000 : Piston Pin 70SZ-H/91SX C Spec Piston Pin 70SZ-H/91SX C Spec Price: £2.98 £3.50 Including VAT at 17.5%
27708010 : Drive Washer 61SX/RX/SF/RF-H Drive Washer 61SX/RX/SF/RF-H Price: £7.65 £8.99 Including VAT at 17.5%
27708200 : Woodruff Key - 61SX/RX/SF/RF-H Woodruff Key - 61SX/RX/SF/RF-H Price: £2.54 £2.98 Including VAT at 17.5%
27917000 : Piston Pin Retainer - 61SX/RX/LX-H Piston Pin Retainer - 61SX/RX/LX-H Price: £2.13 £2.50 Including VAT at 17.5%
27930000 : Ball Bearing (R) - 61SX/RX/LX-H Ball Bearing Rear for the OS.61SX/RX/LX-H Price: £11.49 £13.50 Including VAT at 17.5%
29051000 : Crankcase 91SX Crankcase 91SX Price: £71.48 £83.99 Including VAT at 17.5%
29051010 : Crankcase 91SX-H C Spec Crankcase 91SX-H C Spec Price: £76.59 £89.99 Including VAT at 17.5%
29052000 : Crankshaft - 91SX-H Crankshaft - 91SX-H Price: £40.43 £47.51 Including VAT at 17.5%
29052100 : Crankshaft - 91SX-H C Spec Crankshaft - 91SX-H C Spec Price: £38.29 £44.99 Including VAT at 17.5%
29053100 : Cylinder Liner - 91SX-H Cylinder Liner for the OS.91SX-H Price: £53.19 £62.50 Including VAT at 17.5%
29053200 : Piston 91FX/SX-H Piston 91FX/SX-H Price: £27.66 £32.50 Including VAT at 17.5%
29053210 : Piston - 91SX-H C Spec Piston - 91SX-H C Spec Price: £25.52 £29.99 Including VAT at 17.5%
29054100 : Heatsink Head - 91SX-H Heatsink Head - 91SX-H Price: £34.03 £39.99 Including VAT at 17.5%
29054110 : Heatsink Head (Gold) - 91SX-H C Spec Heatsink Head (Gold) - 91SX-H C Spec Price: £48.94 £57.50 Including VAT at 17.5%
29057000 : Coverplate 91SX-H Coverplate 91SX-H Price: £6.80 £7.99 Including VAT at 17.5%
29057010 : Cover Plate - 91SX-H C Spec Cover Plate - 91SX-H C Spec Price: £8.30 £9.75 Including VAT at 17.5%
29081719 : Carburettor Retainer - 6H-7M Carburettor Retainer - 6H-7M Price: £3.83 £4.50 Including VAT at 17.5%
29081910 : Mid Range Needle Valve 91SX-H PS Mid Range Needle Valve 91SX-H PS Price: £15.31 £17.99 Including VAT at 17.5%
29084610 : Nipple T-Type 91SX-H C Spec Nipple T-Type 91SX-H C Spec Price: £3.62 £4.25 Including VAT at 17.5%
29503400 : Piston Ring - 91FX Piston Ring for the OS.91FX/SX Price: £12.76 £14.99 Including VAT at 17.5%
29505000 : Connecting Rod 91FX/91SX/60FP/65LA Connecting Rod 91FX/91SX/60FP/65LA Price: £11.91 £13.99 Including VAT at 17.5%
29505010 : Connecting Rod 91SX-H C Spec Connecting Rod 91SX-H C Spec Price: £12.76 £14.99 Including VAT at 17.5%
29513000 : Screw Set 91FX Screw Set 91FX Price: £5.10 £5.99 Including VAT at 17.5%
29514000 : Gasket Set 91FX Gasket Set 91FX Price: £2.54 £2.98 Including VAT at 17.5%
41621100 : Screw for Needle (60B) Screw for Needle (60B) Price: £2.77 £3.25 Including VAT at 17.5%
45010002 : Propellor Nut - 5/16 UNF Propellor Nut - 5/16 UNF Price: £1.28 £1.50 Including VAT at 17.5%
45406000 : Piston Pin FT-160/91FX Piston Pin FT-160/91FX Price: £3.40 £4.00 Including VAT at 17.5%
46120000 : Thrust Washer - FT120II/160/91FX Thrust Washer for the OS FT120II/160/91FX Price: £1.28 £1.50 Including VAT at 17.5%
72001010 : Viper Head 91SX-H Viper Head 91SX-H Price: £153.18 £179.99 Including VAT at 17.5%