no such thing is there?
it's either a 2.5, in which case yes, or it's got an earlier injun retro-fitted, in which case fook knows.
 
only if the valves and valve seats have been replaced. the 2.5 was the first , to my knowledge, that was designed to run on lead free - but there are loads of peeps wot does converted heads. Turners do one.
 

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