May 15, 200818 yr Just bought a '99 315 cheaply with the intention of getting it sorted out. The bike in general seems good but at idle and low revs the top end has a metalic tapping noise. Give it some beans and it goes away, sounds spot on in fact. In general it sounds very quiet, no whirring or anything just an annoying tap! I've got super unleaded, 80:1 mix, new air filter, new plug, cleaned ehaust, cleaned carb and its still the same so next will be head off Strange thing is the guy reckoned it had had head work done recently and this is 'sort of' backed up by obviously recent gaskets. I'm hoping it might just be the top end bearing that needs doing, what do you reckon? Where is the best place in the UK to buy parts? I figure worst case I'm going to need a piston kit and a nikosil lining.
May 19, 200818 yr Author Cheers Billy, I checked out jet sizes but in the end just took the head off. Piston and cylinder were knackered, swapped them over today and she's running tight as a nut!
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