I recommend dont use these pistons on any stage 4 tune the rings cant handle itjoespeed wrote:both these pistons are cheap cheap,both quality and price you really need one from mr broadhirst or an af oneshocky wrote:you could try a replacement "mahle" type piston with thin rings like this one http://cgi.ebay.co.uk/LAMBRETTA-GP-200- ... 3ef52af71d
or a slightly more upmarket one like this http://cgi.ebay.co.uk/LAMBRETTA-GP-200C ... 1c0c7934ae
the asso pistons are now aproaching £90 (the AF web site is way out of date)
I know from experience
Go the ASSO route or Mahle Piston with Asso rings costs £65 ish
Remember the Asso 66mm has the 3mm off the skirt, so need to take this into account
when doing the tuning Mahle piston doesnt.
Im at present doing 4 200cc st4 for people and this is the route Ive gone
