Hey guys, I recently picked up an MC18 track bike to muck around with, after using my 4 stroke street bike for a track toy for a year or two and as this is my first two stroke I have some (probably very simple) questions:
1) I think I have a stock airbox (and probably stock jetting too - 138/140 mains if I recall correctly). What is the stock jetting and which cylinder is meant to run the leaner setting and why?
2) I have a foam airfilter that looks pretty new and clean - again I'll assume its a stock item. Are these meant to run dry or wet? If its wet then I'll have to go and get some air filter oil.
3) All the oil pump and ancillary equipment has been removed. Are there any real modifications to the plumbing I should check to see if this conversion was done correctly? Is there a recommended pre-mix ratio (I read 30:1 somewhere) or should I just go off whatever's on the premix oil label?
4) On the topic of premix - some people have told me that running premix
might lead to engine siezure at the end of the straights - ie. back off the throttle at high RPM and flick down 3 or 4 gears for a slow corner, meanwhile the carbs are closed meaning no fuel, thus no oil for the engine right when it needs lubricating the most! Should I be worried about this? Is there anything I should do differently to compensate? (eg hold the clutch in and let revs drop while braking rather than flicking it out through each gear change like I do normally?).
5) After pulling the bike apart on the weekend, it looked like there was a sensor or valve or solenoid that was connected to the computer, and a couple of air hoses near the carbs. To me it looked like a pressure sensor that gives you relative manifold pressure. What does this item actually do?
6) The bike apparently hasn't been run for a few years, but after a bit of a clean out it started pretty easily and I rode it aroudn the block for about 2 or 3 minutes and everything seemed fine. Should I pull the barrels off anyway and inspect the pistons / rings / cylinders anyway given that I don't knwo the history of the bike, or if it seems to be running ok shoudl I not worry?
Thanks heaps people!