Little background on the GSXR wiring, it was screwed. I'm talking, hacked, chopped, burnt, shorted, you name it! So I did up my own loom just for engine running, later I'll do lights (Its not my first time wiring up a bike by the way). So this system worked flawlessly, until a few hours ago when for no reason at all my Ground wire from the battery started to smoke. So I was like hmm short circut somewhere, I checked it and everything was tight, hooked up solid as was before! So I flick my ignition to the 'ON' position and everything is still fine, then when I start to turn the bike over it begins to get hot on both the Positive and Ground wires. Checked my grounding, solenoid and starter motor connections, all are perfect! So I changed the Positive and Negative wires coming from the battery with slighty thicker ones, and the same thing happens! 
This thing has all new cables, all brand new connections and I double checked everything. As I said it was perfect up until now and I've wired bike the same way in the past with no problems. I will dig deeper into the situation but if anyone has any help or suggestions they would be much appreciated 
Thanks,
Kieran