Hi All .. after your thoughts
Standard TS1 ran for years always been reliable. After crank break down, fitted new crank , piston and rings , new bearings all the usual while in there . Squish 1.2 good compression ratio , timing set 17’ , air leak tested .
But just won’t run right , almost like 4 stroking , spluttering at 55/60 , it’s the same jetting, so tried few combinations from previous years which made no difference!
Engine out again !! checked over everything , just not the same bike, at bit lose end what try next !.