If I start my bike up then the oil return is healthy for a few seconds but then reduces to the odd spurt, blowing big oil bubbles. If you turn the engine off, wait a minute and try again, then the same behaviour occurs. This would seem to point to the oil pump being OK, especially given that it is not wet sumping.
At first we thought it might be a problem with the return flow of oil but we're now beginning to suspect that it might be that the oil isn't flowing into the system quickly enough. Hopefully it is not the feed non-return valve as that means splitting the crank cases and replacing it.
There is a good description of the lubrication system on the Classic Bikes web site:
HI SOREY I HAV DISLESEOR.
ReplyDeleteON MINE IT WOS DOWIN THE SAME AND THE OIL LEVALL WOOD START TO GET LOWE IN THE TANK IT TURND OUT TO BE THE BALL BARING IN THE PUMP INDECATED AT (C)YOU CAN NORMALEY FREE THEM BUT IN MY CASE I HAD TO STRIP THE PUMP OUT AS THE BARING WOOD KEP STICKING
Hi Keith,
ReplyDeleteThanks for your input. Really appreciated. Turns out that the oil pump was worn and a good second hand one was fitted plus a slightly thinner oil was used.
Regards.
Peter ( Mario )