Been looking @ these as a possible option for worn cylinder? i have red about people saying that an oversize will cause all sorts of problems, but is this just a small increase that will work or is it a handgrenade waiting to go off? i would prefer first hand experience not a mate of a mates Dog etc;)

I had re sleeved  my cylinder to an original OEM piston, machine shop indicated that this being a trials bike was a saving grace. Very little material to work with in original cylindar as that this basically started at about 185 cc then 200cc  up to 250. IF you have the rare large finned  Australian cylinder going to sleeve and original piston would be my suggestion. Someone on ebay or this forum has re-pro 250 pistons. I had bought 2 sets a dozen or so years ago, but never found a 2nd TLR . I may be open to offers.

95% of my issues were resolved through info on this site, hope yours works out.