Cylinder Head Work

SRM are able to offer a complete Cylinder head renovation service. This includes all the services required to bring your cylinder head to A1 condition.

The Serdi 3.0 is one of the most accurate cylinder head machining centre available in the World today. It was designed and produced to enable the highest accuracy machining jobs on multi valve cylinder heads The seats are cut so accurately that if new valves are fitted, lapping in is not required. All heads are vacuum tested in situ. The valve seats can be cut to any angle required plus the correct relief radius to allow a more efficient flow of gas past the valve seat opening and valve head, which means a more efficient engine.

To run your classic four stroke engine on lead free petrol only the exhaust valve seats have to be replaced. This is due to the intense heat produced around the exhaust valve seat area. We replace the seats with a special hardened steel insert. We can supply compatible valves for the replacement seats. We can fit the Valve seats to any cast iron and aluminium cylinder head.

SRM stock a large range of valves for BSA Twins and Triumph 650 and 750cc Twins.
We also strongly recommended the use our Colsibro material valve guides composed of Copper, Nickel, Silicone alloy which resists wear, corrosion, spark erosion, has a high tensile strength and can cope with rapid temperature changes, the closer tolerance enabled by using this material allows for a cleaner running engine.

 

Service Code Service Name Cost (ex. VAT)
SRMCH2A Lead free valve seat single cylinder £69.46
SRMCH2B Lead free valve seat Twin cylinder £94.82
SRMCH2C Lead free valve seat Three cylinder £124.59
SRMCH2D Lead free valve seat Four cylinder £153.25
SRMCH2F Lead free conversion BMW, Guzzi Twins (pair of heads) £117.97
SRMCH3A Gas flow A65 twin 32mm £148.01
SRMCH3B Gas flow A65 34mm £177.63
SRMCH3C Gas flow A10 30mm £148.01
SRMCH3D Gas flow Triumph twin £111.01
SRMCH12A Head assembled & checked single cylinder £29.63
SRMCH12B Head assembled & checked Twin cylinder £38.54
SRMCH12C Head assembled & checked Three cylinder £61.92
SRMCH12D Head assembled & checked Four cylinder £88.81
SRMCH1 Valve seat re-cut multi angle £8.82
SRMCH4 Valve guide lined insitu each £12.23
SRMCH5 Worn valve guide hole welded and re-machined £74.04
SRMCH18 Valve refaced £6.67
SRMCH7 Old guide removed new fitted and honed each £9.63
SRMCH8 Valve guide machined for oil seal inc seal £9.34
SRMCH17 Spark plug thread insert solid top hat type £22.23
SRMCH17A Spark plug BIG insert for very worn/damaged holes £29.63
SRMCH6 Rocker arms lightened and polished set of 4 £177.63
SRMCH18A blast clean valve £2.97
SRMCH23 Bead blast and clean Triumph Rocker boxes pair £26.66
SRMCH24 Bead blast and clean A10 Rocker box £26.66
SRMCH25 Polish A10/A7 Tappet inspection covers pair £14.82
SRMCH26 Solid top hat thread repair rockerbox to head thread £12.60
SRMCH27 Strip, clean & assemble Triumph rocker boxes pair £18.53
SRMCH19 Bead blast and clean twin head £49.62
SRMCH19A Bead blast and clean single head £38.59
SRMCH19B blast and clean triple head £66.15
SRMCH2 Convert Triumph push in to push over £42.10
SRMCH20 Bead blast and polish A65 rocker box £30.87
SRMCH21 Triumph exhuast port thread repair inc stub £51.83
SRMCH22 Combustion chamber reprofiled £44.41
SRMCH28 Machine out old seat,weld up, new seat £74.04
SRMCH29 Reprofile combustion chamber to standard £37.03
SRMCH9 Head bolt/stud hole drilled & spot faced £2.22
SRMCH13 Skim cylinder head face/rocker box face £38.50
SRMCH10 Cast iron head shot blasted and stove enameled £49.62
SRMCH11 Damaged/broken fin repaired on head (from £22.23

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