well... I think you should better use a racingpipe. the design of the MHR is made for that. No wonder, that the cylinder sucks your 24si dry... the description in the sip-webshop already says it - 30mm diameter upwards... in this point sip might be right but give it a try... as long as you got a silent box to test it, people might be thankful for reading about your expieriences!