Hello all, I realise there have been many postings on this topic but I have a question about fitting the Velocette anti-drain valve to the oil tank outlet as has been suggested. The oil lines on a Velo are 5/16" I.D. and the Norton lines are bigger. Will the 5/16" diameter of the Velo valve restrict the flow excessively. My Mercury oil tank completely empties into the sump over time.
Cheers, Terry
Service the oil pump to…
- Log in to post comments
Time for a tap?
Hi,
As Peter says, anything in the oil feed that might stop oil reaching the pump is a risk, but I have tried 'servicing' 2 different oil pumps on my 650 and it still wet sumped. ( nb: I have and use 3 other bikes, so my Norton might go 2 or more weeks between rides, also I use 20/50 oil, not a straight oil). The result was I used the bike less because of the farting about draining the sump each time I went to use it.
I first fitted a 'Velocette' type valve in the feed line (RGM) and it worked fine, but I always had the nagging doubt of 'what if' it stuck shut and the consequences of that.
Following the lead from others, I now have a tap in the feed line with an ignition cut out on it - switch not open = no starting. When testing it, the power supply is cut should the tap close even by a tiny amount, so I'm happy I'm not going to wreck the engine by a compromised oil supply. The tap I have was supplied by Kingpin Components, but there are other suppliers.
Bottom line is that I find myself using the bike more often because I no longer need to mess about simply to start it.
Regards,
George
- Log in to post comments
Second vote for a tap
Hi Terry,
I've also fitted a tap with a cut out switch to my mercury. Also fitted to my commando.
Loads better than mucking about with draining oil etc and it saves on wearing out any threaded parts.
win win.
- Log in to post comments
Service the oil pump to close the internal clearances down to zero, this will cut down wet sumping. Fitting any sort of valve in the oil pump suction line can lead to disaster.