Did a bit more on the bike tonight, got the old plugs out and dropped some oil into each cylinder to soak for a week or two, and then turned back to the carburetors. I feel like someone's been into these before, because one of the eight screws in the top caps is different to the others, and another was torqued crazy tight. Unfortunately the tight one rounded out yesterday while I was trying to shift it, so tonight I soaked it some more with WD40, cut a groove in the top and after removing the other three in that cap so I could give the top a wiggle I got it loose with a flat head screwdriver... clearly I'll be replacing that one. Anyway, two questions on the carbys: 1. According to this guide: http://teamghettoracing.com/mechanical/carb-efi-work/suzuki-across-gsx250f-carb-overhaul/ (I'm sure everyone has seen this!) once the caps are off you can just pull up the diaphragm and the slides, but mine pulls up a little and then hits the stops, the slides themselves won't budge, do I just need more WD40 or is there something holding them in place? 2. The four main jets came out fine, and three out of the four pilot jets did also. Unfortunately one pilot appears to be rounded off. I didn't put any more force into this than the others and get the feeling it was done previously... do I have any good options here? I'm assuming having a single pilot jet not super clean won't be the end of the world but it's obviously not ideal. The others are all soaking in carb cleaner, I could only see through 1/7! And then the third question - this is definitely a newbie one (first bike I've done this kind of work on). The tank wasn't stored full, which sucks, but it doesn't look terrible either. I topped it up with fresh fuel and gave the bike a shake around, then tonight pulled the fuel line off the pump and opened the pet cock both ways to run some fuel out into a container (see image). There's no major crud in there, but the fuel clearly has rust in it, this is literally the first fuel out. How bad is this? Can I get away with running a full fresh tank through and seeing how it goes? I'll be putting a fuel filter inline before the pump before I try running it. Last but not least, I reckon something used to live in this bike that liked to snack on slimy things, check out what I found underneath the carbs!