The Knowledge - Velocette Owners Club

it should. Figured I would think a bit more about the situation before posting this problem for others to
offer their useful comments. [At present, I am leaning towards the possibility that there is enough play
in the camplate that it tips sufficiently to allow the actuating pin in the upper fork to slip from its slot,
jamming the camplate into the actuating pawl and binding up the shift lever]
L #614 Oil filter tube , If the fibre gear strips it will certainly block up the oil return , I've had it
happen in the past and a friend had it happen only a few weeks ago on a club outing , the pump
pressure split the return line . I do NOT recommend removing the tube from the Filter , When the
engine stops all the muck in the filter will drain down with about a half pint of oil back into your crank
cases , a) it makes it difficult to start with all the oil drag ( especially cold), over-oils the engine till it all
clears , c ) think of all the grit ,swarf and silicine that is in there ! Nots /bolts for the MOV . I don't know
of anyone who does Kits , but the VOC have many bolts sized according to listed part number/length
/thread .
L #638 While on the subject of oil tanks, I strongly recommend the fitting of the VOC oil filter kit in
place of the original. The cartridge filters are so much more efficient at straining out contaminants. On
early oil tanks it fits without any modification, on later tanks you need to file away about 1-2 mm of
protruding tube. If you do this put the tank cap on and block the tube off from the inside with a small
piece of rag to avoid iron filings in the oil tank. Details of the kit can be found here
www.velocetteowners.com/sparesco/specials.htm
#639 Problems to translate, what do you mean "to file away 1 - 2 mm of the protruding tube" ?
#641 On later Velos, the plain hole from which the oil flowed from the filter chamber back to the oil tank
was replaced by a very short piece of tube. The tube enters the filter chamber and stops the oil filter
cartridge from fitting easily, so it needs to be filed away to allow the filter to fit into the chamber.
L #640 A more general question about oil filtering. In disassembling the oil feed tube on my '50
MAC, I noticed that it did not have the "gauze filter" described in the owner's manual (it did have a ball
check valve which seems redundant, since there is already one in the crank case). It occurred to me
that some sort of filter would be in order. In discussing this with some more knowledgeable people, they
essentially told me not to bother, as long as I was vigilant in changing my oil regularly. There rationale
was twofold: I) the tolerances in the pump are rather large by today's standards, so small particulates
will essentially pass through the pump anyway, and ii) any filter with even a small pressure drop across
it will prevent the oil pump from doing its job properly, since it is a volume (not pressure) based system,
and will not tolerate significant pressure drops. They further opined that the gauze filters were suitably
porous that they didn't do an effective job of filtering the fine particulates anyway. Apparently, the filters
under discussion here are meant for later [and different?] machines. Regardless, should I be pursuing
the installation of some sort of filter on the input line?
L #659 What's the best low-tech method of sealing the poly tubing to the copper tails of the
banjo(etc) connections in the oil system?
#660 Take them to a hydraulic hose or lorry parts company and get them crimped.
L #761 I've got a couple of questions which I hope someone can answer. The oil filter in the tank
has been taken out and an external (RGM) filter fitted on the return line. Is this a real advantage or not?
I'd really rather not have the external one on, simply because I don't like the look of it. If it were a real
advantage I could (just) live with it. I would have thought that the original filter is adequate providing oil
is changed regularly. Any views welcome.
#762 A few years ago while changing the filter in a BMW twin I found it fit the Velo oil tank quite well,
so that's what I use. It's a paper cartridge filter. All that's needed to fit a Velo is a couple big o-rings or
washers to center it in the bore. Some tanks will need to have the small tube trimmed back to let the
filter slide by. Framm and Purolater market this filter if you don't feel like frequenting the local Beemer
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