Differences between T250 and T350… the hard way.

Well tom’s pipes turned out to be t250 ones. They’re nigh on impossible to differenciate: the T350 have a specific exhaust nut about 4mm larger in inside diameter (50mm, the T250 are ~46mm). All the rest is the same. Bloody hard to find too.
Other differences include the cylinders (larger bore), carbs and heads. All the rest is the same as a T250.