OK, so I'm still going thru this MACH 1 checking it over inside and out. Something I've come across that my MACH Z doesnt do is leave a black puddle under the exhaust. The puddle seems to contain oil (i think), its seems slightly slippery which is why I figure oil and not fuel ( i have not tasted it yet). Letting the sled idle for 5 mins I found it left a puddle of about 10" in diameter. So what causes this puddle... is it the fact that the silencer forces the 3 pipes to exhaust through one, thus making the concentration of the puddle higher making it seem worse then the MACH Z? Is it fuel, oil, both...if so why? RAVE valves? What do you think? thanks.