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Messages - Phil C

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Singles / Re: Oil leak
« on: 22 June, 2018, 19:36:51 »
Crikey. That sounds a bit major for someone like me with no previous experience and no specialist tools?   Phil.

Singles / Re: Oil leak
« on: 22 June, 2018, 18:31:45 »
My apologies, the leak is not where I thought. Here is a photo taken from the other side of the bike. You can see three vertical runs. Any ideas?   Phil.

Singles / Oil leak
« on: 22 June, 2018, 15:27:30 »
I'm looking for advice again, please. Having recently changed the oils on my 1965 B40F, this morning I took it for its longest run since I've had it - about 8 miles. It was great fun, much lighter than my 2011 Bonneville T100, albeit a bit slow on a long straight (even though I'm probably the slowest motorcyclist in Devon!) Anyway, I got home, put the bike on its sidestand, and when I came back to it later I noticed an oil leak.  I wiped the oil up off the floor and from the underside, and couldn't see much if any oil coming out anywhere, but thought it was coming from the primary chaincase, so I topped up the level and took it for a run up the road and back. When I got home the oil appeared to be coming from the bottom of the primary chaincase, a couple of inches or so  behind the drain bolt, so maybe an inch forward of the the bolt next to the brake pedal.  The leak seems to slow or even stop when the bike is left to cool down. 

I haven't had this leak before, so I'm guessing it's because I've disturbed the seal by taking out the drain bolt and the oil level bolt? I've checked the tightness of both those, and the one behind the drain bolt, near the brake pedal.

Three questions:

1. Am I likely to be right about the reason for the leak?  If so, does this mean I'm likely to have the problem each time I check/top up/renew the primary chaincase oil level?
2. Why does the leak slow down when the bike is left standing? Is it because the oil thickens a bit as it cools?
3. Do I need to take the casing off, clean the joint, and re-fit it?

Thanks in advance again.   Phil C.

Singles / Re: B40F gear oil capacity
« on: 16 June, 2018, 15:12:22 »
Anyway I've printed off the link sent by hoogerbooger.  Thanks very much.

Singles / Re: B40F gear oil capacity
« on: 16 June, 2018, 14:44:08 »
The instruction manual I have says 3/4 pint (425cc.)  I must have the wrong manual!

Singles / Re: B40F engine running again after 18 years( !!!!!!)
« on: 16 June, 2018, 14:40:42 »
Well done hoogerbooger!

Singles / Re: B40F gear oil capacity
« on: 16 June, 2018, 01:12:09 »
Any thoughts on this, anyone?   Phil.

Yes, just had a look at mine.  A few months ago I thought I'd try ordinary nuts, but haven't got round to it, and, as you say, it might be difficult to get access with a spanner. From memory, I think they're 4BA, but I'm not certain.

My sleeve nuts are round section with a slot for tightening/loosening, which seems to me an odd design. I have several washers underneath in order that the slot is proud of the top of the screw so that I can get a screwdriver on. The slot seems to me not a very robust design, easily chewed up.


Ordinary hexagon nuts instead?

Singles / Re: B40F gear oil capacity
« on: 14 June, 2018, 20:28:52 »
Or, another idea  - long shot - maybe when I'm pouring it in it's pouring straight onto the top of the level tube? Unlikely, I guess. Phil.

Singles / B40F gear oil capacity
« on: 14 June, 2018, 20:23:03 »
My EP90 having arrived, I have just poured some into the gearbox of my 1965 B40F, having drained off the old stuff last week. The capacity I believe is supposed to be 3/4 pint. Yet the oil was coming out of the level tube when I had put in less than half a pint. Seems a bit odd.  The only two explanations which spring to mind are: 1) there was residual oil in the gearbox? But surely the drain plug is at the lowest point when the bike is on its centre stand?; or  2) the oil level tube is too short?  Maybe I need to take it out again and measure it?  Any advice would be appreciated.   Phil.

Singles / Re: Gear oil grade
« on: 05 June, 2018, 18:34:04 »
Just seen your post, Julian.  Thanks very much, but, as I say, I've ordered some Castrol EP90, which I assume will be fine.   Phil.

Singles / Re: Gear oil grade
« on: 05 June, 2018, 16:56:50 »
Wish I'd read this before I ordered the EP90!  Oh well, I'll know in future.  Thanks, AWJDT.  Phil.

Singles / Re: Gear oil grade
« on: 05 June, 2018, 15:37:22 »
Yes, I saw in the Haynes manual that Castrol GTX 20w50 was recommended, and so thought about using the same stuff I have in the engine (Comma Classic 20w50.)  But I see that in Nigel Clark's book "Classic Motorcycle Restoration and Maintenance" (I have the books but not a clue!) EP90 is recommended. Rupert Ratio vol 1 (p.42) tells us that EP90 was not originally recommended by BSA as there was a possibility of the gearbox oil seeping along the gearchange shaft, kickstart shaft and from the gearbox main shaft bush, to mix with the engine oil. RR goes on to say that this is not possible in the sidepoints engines. Mine is side points, so I guess I'll look to use EP90.  But as I say, the shops don't seem to have much in the way of straightforward EP90.  Maybe I'll look on-line.  I suspect that, as I think someone suggested when I was posting about primary chaincase oil, I might be over-thinking this - maybe it's not all that crucial.  But anyway, I'll look on-line for EP90.   Phil.

Singles / Gear oil grade
« on: 05 June, 2018, 13:03:06 »
What oil should I use in the gear box of my 1965 B40F?  I thought it should be EP90, but there don't seem to be many straightforward EP90s. Is 80w-90 suitable? Also, what is GL4?  Phil.

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