The 250 motor in your bike , is a modded Ts250 engine. in the Beamish world, there called the silver engine.
the 325cc engine is a new engine and only came from Suzuki as a 325. Beamish in the UK got some engines converted down the 250cc(because the 325 can be a bit of a handful) these engines are called the Black engine bikes.
Also an interesting note, Suzuki never used the engine themselves, it was a UK Beamish Suzuki exclusive.
