Valves would have to be very tight for those to be the issue.......... but yours are the classic symptoms of tight valves---no start condition when hot, but fire right up when cold.
how many miles on it, when were they last actually adjusted
I just did a 42,000 gsxr600 recently that they claimed (dealer claimed actually and customer had receipts) were adjusted at 16k and 35k---yet the welds on the frame corners were in the way to remove the valve cover gasket still (many 600 gsxr's have this issue where the welds were so globbed on you needed to grind down a few mm to get the valve cover up and out)
anyways- obviously the cover had never been off.
all the intakes had 0 or less clearance, and all the exhausts were between 0 and about .003" clearances.......
lets just say it ran much better and started easier after a proper adjustment~ and while I did not ever ride it before, I bet it had tons more power than how he was riding it too.
how many miles on it, when were they last actually adjusted
I just did a 42,000 gsxr600 recently that they claimed (dealer claimed actually and customer had receipts) were adjusted at 16k and 35k---yet the welds on the frame corners were in the way to remove the valve cover gasket still (many 600 gsxr's have this issue where the welds were so globbed on you needed to grind down a few mm to get the valve cover up and out)
anyways- obviously the cover had never been off.
all the intakes had 0 or less clearance, and all the exhausts were between 0 and about .003" clearances.......
lets just say it ran much better and started easier after a proper adjustment~ and while I did not ever ride it before, I bet it had tons more power than how he was riding it too.