Is it 68x 68 bore/stroke, lots of bits are standard Rotax stuff. The water pump was used to convert air cooled Can Am bottom ends to water cooled to make the 124 and 244 kart/road race engines. The RAVE valve is standard Rotax stuff, gear box if 5 sp with be the same as any other Rotax 5sp same for the 6 sp. Drop me a PM if ever need any bits