hi, I had this problem last month it lasted 2 or 3 days then all of a sudden it ran fine again. but this problem has just re occurred. when I put my foot down I don't have my full power and you can hear it struggling to keep the revs up. they drop and bounce around a lot causing it to be a very uncomfortable ride. the pipes leading to the airfilter from the vacuum was clogged with oily sludge. I removed the pipes and cleaned them out but am struggling to get on the bolts that hold the vacuum on. anybody done this before that could shed some light on why this is happening, or got any tips?
thanks in advance for any replies.