Most of the time you'll get away with a hone and a new set of standard size rings.

Measure the ring gap as it sits now. Then after a light hone. Have you got a manual with the specs in ?

Lets hope so ted.Im using the a free manual thats on the nest its got all the values in it so should be able to workit out the only problem is we have only just moved to Switzerland and half my tools are still in Italy and I do not have a work shop here yet so having to do all this out side and it keps raining on me :thumbdown: lol

Well I've made a boo boo when attemting to undo the bolts for the Air Suction valve from the cylinder 3 of the bolts heads snapped of and as i was in a rush to get it do and out of my wifes way.i used an easy out which in turn snapped (I know don't say it f****** easy outs) so then tryed to drill it out Idid but guess what it made a complete mess so now not enough metal for helicoil which is what i should have done in the first placed.So what do you guys think of Epoxy putty then tapping it fitting a helicoil in and then thread locing the new bolts in.It dosn't need to hold up to much as its not a high presure part.