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As its friday, hows about and engine question... I've a Honda 1998 Honda CBR900RRW for my 1st ever motorcycle winter project, and have just taken the carbs off for cleaning and have found a pipe coming out of number 2 cyclinder which goes to the fuel tap vacuum. But on cylinder number 4 there is a valve coming out for what I cannot find a hose for...
Question is: the other with no hose attached, for a scottoiler etc? there is quite a bit of gunge coming out of the head and a search of the information superhighway suggests this... if so do I just put a blanking bolt in it and not worry anymore?
Its not fuel injected injected, but does have a throttle position sensor.
Photo here
IIRC Scottoiler have some comprehensive installation diagrams on their website - you could trawl through them and see if there's anything there that matches what you've found