Cylinder Head
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LabelPart NamePart No.
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1Cylinder head bare with guides alloy - 1275cc - 12G940 styleC-AHT347
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1Cylinder head bare with guides - 1275cc MPI onlyLDF105800
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1Replacement Cylinder Heads - Lead Free - Reconditioned - 998ccGCG1007MS
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1Replacement Cylinder Heads - Lead Free - Reconditioned -1275cc pre 1992GCG1009MS
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1Replacement Cylinder Heads - Lead Free - Reconditioned - MPI (Twin Point)GCG1009
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1Replacement Cylinder Heads - Lead Free - Road/Rally - 1275cc pre 1992C-AHT135
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1Replacement Cylinder Heads - Lead Free - Road/Rally - MPI (Twin Point)C-AHT136
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1Replacement Cylinder Heads - Lead Free - Race Quality Valves - 998ccC-AHT88
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1Replacement Cylinder Heads - Lead Free - Race Quality Valves - 1275 cc 1992 onMSE4
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1Replacement Cylinder Heads - Lead Free - Race Quality Valves - MPI (Twin Point)MSE7
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2Valve guide, steel except turbo12G1963
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5Brass tapered plug in face of head with hole 15-16mm wideAEA771
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6Seat for lead free exhaust valve 998ccTAM2068
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6Seat for lead free exhaust valve 1275ccTAM2069
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7Stud 5/16” UNC 3”long for rocker cover and posts51K885
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8Stud 5/16” UNC 23/4”long for inner two rocker posts - was CHS52251K1473
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9Stud 5/16”UNF 11/2” long for manifold to head53K487
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9Stud 5/16”UNF 13/4”long for inner 4, manifold to headLYR10028
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10Valve, inlet 33mm with triple collet groove 1275ccTAM1058
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10Valve, inlet 35.6mm with triple collet groove 1275ccTAM1059
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10Valve, inlet 27.8mm with triple collet groove 998ccTAM1062
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10Valve, exhaust 29.2mm with triple collet groove 1275ccTAM1061
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10Valve, exhaust 25.4mm with triple groove 998ccTAM1770
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11Valve spring single12G1015
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12Seal for valve stemsADU4905
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12Seal for valve stems, better quality alternative (Viton)LJQ101160
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13Top cap for valve springsAHU1897
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14Collet for valves, twin grooves sold as one half onlyCAM6975
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15Rocker shaft – see upgrade [LINK]C-AEG399[/LINK]12A1950
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15Rocker shaft performance upgradeC-AEG399
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18Rocker, sintered type 1.3 lift (fitted as standard)CAM289
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18Rocker, forged with bush 1.3 lift - Alternative12G1221
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19Adjuster screw was [LINK]12H3376[/LINK]AEG167
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20Nut for adjuster screw 5/16”UNFNT605061
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21Spring double coil washer for rocker shaft2A18
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22Spacer spring for rockers6K556
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23Screw for rocker post No22A258
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24Locking plate for [LINK]2A258[/LINK] screw (use 2A515 and modify)2A259
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25Washer at end of rocker shaft, see [LINK]AEG168[/LINK] and [LINK]AEG169[/LINK] also6K555
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26Plain washer 5/16”UNFGFK1114
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27Plain nut 5/16”UNFGFK3212
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28Cylinder head gasket 998ccGUG702506HG
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28Cylinder head gasket 998cc - Budget copper typeGEG302
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28Cylinder head gasket 998cc performance composite materialC-AEA647
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28Cylinder head gasket 1275cc - Black BK450 less rubber ‘O’ ring sealTAM1521
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28Cylinder head gasket 1275cc - Original copper type AF460GEG300
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29Head nut with shoulder 3/8”UNFCAM4545
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30Stud 1/4”UNF 1 1/8” long for heater valve take off53K402
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30Stainless steel stud 1/4”UNF 1 1/8” long for heater valve take off53K402S
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30Stud kit 1/4”UNF 1 1/8” long for heater valve take offC-STR285
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30Stud kit 1/4”UNF 1 1/8” long for heater valve take off - Flanged nutsC-STR281
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31Gasket for heater valve take off88G221
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32Heater tap blanking plate2A180

Reconditioned | Road/Rally | Race Quality Valves | |
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998cc | GCG1007MS | C-AHT88 | |
1275cc pre 1992 | GCG1009MS | C-AHT135 | MSE3 / MSE8 |
1275 cc 1992 on | GCG1009METRO | MSE6 | MSE4 |
MPI (Twin Point) | GCG1009 | C-AHT136 | MSE7 |