Triumph Pistons Pair +040 /+1.016 mm 1972- 747 cc TR7R. T140 High Compr. NOSDate of Manufacture ca. 1974Powermax1972 onwards 747 ccOHV Tiger 750 TR7RBeonneville 750 T140 High Compression 10.5;1Also suitable f. 724 cc 75 mm bore Engines of bores to 75.974 mm and standard size Piston fittedRedommended max overisze is +040" 1.016 mm