Well my buddy bought it.. but hes not into forums.. so..
it's an 03 Suzuki Z-400

After "De-****ing" previous owners wonderful work.. we topped off the coolant and fired it up.. Nifty little thing happened when i goosed the throttle.. water flew out of the radiator neck at a good rate.. hmm i work on cars everyday for 8 hrs never seen one do that... hmm maybe quads flow different ? and the water being shot out was blackish as if there were some carbon in it.. Anyhow get it filled put the cap and noticed the coolant in the overflow splashing around like there's big air bubbles coming in there.. pulled the cap off the overflow and smelled it.. smells like exh gas.. WTF so we're pretty sure there's a blown head gasket on this machine.. roll it back in the shop and run it a little more and it starts pissing out more carbon colored water... shut it off and it stopped.. WTF??


So are there any common problems with these machines ?? or is it just result of an incompetent previous owner ?