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matthew wrote:I have taken pics today but i dont no how to upload them onto this site

see the forum help section

Well heres a pic of the piston,the other piston ie exactly the same as this 1,take a look and let me no what you all think
cheers

well you werent wrong about it being smashed were you, that looks like impact damage to me.
what are the valves and head like on that cylinder?

The head is smashed on that piston and there isnt any valves left either

Interestingly there isnt any machining of the perimeter of the piston crown (going on piston number 3). Assuming that the tuner dropped the cylinder base gasket and skimmed the head there is a possibility that the piston to cylinder head clearnace isnt as safe as he says - although I would still have thought that pistons striking the head would cause the rod to fail rather than the piston but I may be wrong on that.

Simple question - does the tuner have a good track record? If so then it seems unlikely that he has cocked this up. If not then - maybe.

No valves This has got to be a clearance problem

"davw"
ive had a lot op people sending me msgs saying that looks like clearance problems,
as for the tuner i thought he was good however i never saw any of his woek b4 but when i droped the bike off he seemed to no what he was on about
the head was skimmed so that might be another possibility then

I have not personally seen the damage that a dropped valve could do but there are those on here that have - that I guess is another possibility which could be caused by poorly set valve clearances (rather than piston to head clearance).
Sorry I cant be more helpful - if I was you I'd whip it round to Roger Middleton - make your apologies about not turning up before and ask him to sort it

Spoke to roger on the phone today and im taking both knackerd engines to him in the morning let him do his magic!!!
thanks for all your help

Good call - let us know how you get on - would be really interested in what Roger reckons the problem was

good luck with the racing

will do pal,when i get back 2moz afternoon i will let ya no what he has said