I don't see how connection issues at the starter are going to cause sparks/melting at the battery terminal - this is caused solely by high current passing through a higher than normal resistance ONLY at the point where it is heating. Poor cable connection at the starter could cause slow cranking, but due to the other symptoms, I don't think it's connection at starter related - it is most likely loose or corroded connection at the battery (as we both described).
This also doesn't meet the definition (as I understand it) of a 'shunt'. Exactly what are you describing in the use of this term? A shunt (relative to battery systems) is typically a connection inserted in series with a battery feed with a low, known resistance so, by measuring the voltage drop across the shunt, the current passing through it can be calculated.
'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
'04 Suzuki LTZ400
'16 RZR XP4 1000 Turbo
Last edited by QuadManiac; 12-18-2009 at 01:45 PM.