I dont have a MM 2 into 1 but have heard that it does give a far bit more ground clearance, slightly more grunt to the engine down low, with no real difference up high in the revs.

The only downsides ive heard from it is ��� and as its a 2 into 1 the rear brake resvoir needs to be moved out of the way and also the exhaust does get very hard and can burn trousers or the RHS leg if your not carefull.

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Plough on