Valve adjustment problems – cylinder head sleeve height
If the valve adjusting screws have reached their end and there is still insufficient valve clearance, the cause may be (a combination of): the valves sit too deep in the valve seats the cylinder head sleeves have sunk deeper into the cylinder head over time. In our experience, the sleeves at the exhaust side sit usually deeper than at the intake side. Below an example of 2 R27 cylinder heads. The RHS sleeve at the intake side of cylinder head 1 has a height of 88.47 mm The LHS sleeve at the exhaust side of cylinder head 2 has a
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Phased out stock & damaged parts at reduced prices
PHASED OUT STOCK (undamaged): Prices are per 1 piece and ex VAT, click on part description to go to the web shop 2 x Membrane for 32 mm carburetor (Bing 165-810) – original Bing From €23.65 for €16.55 2 x Type identification emblem R90S on engine top cover – original From €50.86 for €35.60 2 x Valve seat ring intake 36.64 x 28.57 x 7.95 mm Kolbenschmidt From €17.10 for €11.95 2 x Valve seat ring intake 37.03 x 27.9 x 9.00 mm Kolbenschmidt From €17.10 for €11.95 1 x set Ferodo Platinum brakepads FDB108P > 1981 From €26.- for €10.- 8 x Cork seal for push rod tubes
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