Hey guys my R50 has just started giving me trouble with it being very hard to start and when it does start it stalls under heavy acceleration. Things I have checked, I replaced the fuel filter and noticed the fuel was pretty brown also did an oil change, oil filter and air filter. I have checked the MAF, TPS they seem to be working correctly. When she does start she idles at about 750RPM but when put under heavy load such as a stall test or heavy acceleration she stalls and I have noticed a bit of white smoke leaving the Air intake. Any ideas?