REMARKS :
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Different OEM camshafts were used in this engine family. For ordering the correct sports camshaft, please check:
- engine reference code
- cam reference code
- cam lift
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keyway position: centered between 1st and 2nd cam lobe (54°)(76061xx) OR close to 1st cam lobe (22°)(76161xx)
Example: engine code "AER" has camshaft code "030 BG", cam lift "8.5mm" and keyway close to 1st cam lobe.
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a) 8mm valve stem - engines untill 07/1994
use hard anodised aluminum retainers (ref. 99326) and double valve springs (ref. 902-5009) with fitted length 35-36mm
b) 7mm/0.275" valve stem engines form 08/1994 (types: AEV, ABD, ADX, AEA, ABU, AEE, AEX, AKU, AEF)
use single valve springs (ref. 902-0019) on hard anodised aluminum retainers (ref. 99376)
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- valve clearance is to be adjusted using mechanical lash caps
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please make sure that the lash cap does not touch the valve locks !
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FOR COMPETITION APPLICATIONS ONLY. Following details must be verified:
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the camshafs must turn smooth in the cylinderhead, provide free travel by machining where needed
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distance between valve seal and retainer at full lift must be 0.6mm at least
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minimum valve spring travel of 1.0mm at full lift must be provided
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distance between valve and piston 1.0mm (pref. 1.5mm). check 5-15° before TDC on exhaust, and after TDC on intake
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ONLY for use in competition engines with independent engine management (throttle position sensor) or carburettors