Y'know, I can fully understand the temptation of this system. Back in the days when I ran a CB750, the 4 pipe system really swayed me, and proclaimed to the world that you had a motorcycle with a 4 cylinder engine! Whilst I had that bike a chap at work bought one of these new fangled 400's, I had a quick ride round the block on it, and that along with the looks meant I was hooked, so in 1988 I bought one and still have it now. I looked at this advert for the 4 into 4 and thought it doesn't portray any particular image, then I saw the price, and the final nail in the coffin was the fact that you cannot use the centre stand!!!!! Sorry everybody, but I like my maintenance performed the easy way! Regards, Michael.