Search found 99 matches

by Grayham
Sat Oct 17, 2015 7:43 am
Forum: Tech
Topic: Starting problems new engine
Replies: 12
Views: 2537
Flag: Great Britain

Re: Starting problems new engine

I think this could be the clue; its just like the first spark is strong and then it gets weaker I had a similar problem on a Land Rover that baffled me for days. After replacing every component except the coil (as that was the only component I didn't have a spare of and it was a Bosch one, less than...
by Grayham
Thu Oct 08, 2015 2:15 pm
Forum: Tech
Topic: Why has my Victor GP got two frame numbers?
Replies: 5
Views: 1688
Flag: Great Britain

Re: Why has my Victor GP got two frame numbers?

Thanks for the replies. I thought the vertical number didn't look quite right stamped that way. I also thought the serifs on the 4s give the number on the gusset more of a '60s look, but then that A7 frame has got a sans serif 4. It's still a mystery why anyone would stamp an extra false number on t...
by Grayham
Thu Oct 08, 2015 2:07 pm
Forum: Tech
Topic: CCM frame filter
Replies: 2
Views: 875
Flag: Great Britain

Re: CCM frame filter

Yes, I think you're right, I would be best off with a new one. I'll add it on to my next order. ;-)
by Grayham
Mon Oct 05, 2015 8:13 pm
Forum: Tech
Topic: Why has my Victor GP got two frame numbers?
Replies: 5
Views: 1688
Flag: Great Britain

Why has my Victor GP got two frame numbers?

I've made a start on my GP and found a bit of a puzzle. B44 228 on the left hand headstock gusset. https://lh3.googleusercontent.com/-R81niG-pjIE/VhLJOhc6B7I/AAAAAAAAGfM/t5tvUFm44PA/s800-Ic42/IMG_20151005_194014875.jpg B44 143 on the head tube https://lh3.googleusercontent.com/-IgPcD1cbjks/VhLJQKw3F...
by Grayham
Mon Oct 05, 2015 12:39 pm
Forum: Tech
Topic: crank bearings
Replies: 14
Views: 3427
Flag: Great Britain

Re: crank bearings

I don't get this bit;
...additional internal radial clearance to cope with high speed environments where excess heat is generated
Surely heating a bearing up would increase the internal clearance? Why does it need to start from cold with increased clearance?
by Grayham
Mon Oct 05, 2015 11:27 am
Forum: Tech
Topic: CCM frame filter
Replies: 2
Views: 875
Flag: Great Britain

CCM frame filter

I took the oil filter out of the bottom of the down tube on my '76 CCM and it came out in pieces, so I'm not sure how it's supposed to go back in. https://lh3.googleusercontent.com/-0Ga8k0lTDIs/VhJO1mxM-kI/AAAAAAAAGeI/LJRNIHqg1S8/s800-Ic42/IMG_20151005_111903058.jpg The cap to the left locates on a ...
by Grayham
Mon Oct 05, 2015 11:10 am
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

Flushing the old Castrol R out of the frame. After a proof of concept exercise with diesel, I moved everything well away from anything flammable and started pumping petrol through the frame. https://lh3.googleusercontent.com/-QC5kGA650x8/VhJKGuGsAXI/AAAAAAAAGdg/U_aBZ8QQMxA/s800-Ic42/IMG_20151005_102...
by Grayham
Tue Sep 29, 2015 9:49 am
Forum: News
Topic: www.bsa-c15.org.uk
Replies: 12
Views: 3037
Flag: Great Britain

Re: www.bsa-c15.org.uk

by Grayham
Mon Sep 28, 2015 7:51 am
Forum: Tech
Topic: Fiberglass tank sealer
Replies: 4
Views: 932
Flag: Great Britain

Re: Fiberglass tank sealer

Thanks from me as well, as this is something I will need to look in to soon for my '76 CCM. I had thought about using avgas, but can't find any guarantee that that is ethanol free and will be for the foreseeable future. What about the float and any other plastic parts in an old Mark 2 Concentric? Is...
by Grayham
Mon Sep 28, 2015 7:20 am
Forum: Frame
Topic: nickel plate
Replies: 1
Views: 3457
Flag: Great Britain

Re: nickel plate

http://www.castlechrome.co.uk was recommended as a local chrome platers to me in the UK West Midlands with a warning that they've got a very slow turnaround, which could be taken as a good sign as it means they are busy. I sent them some pictures of a frame & swinging arm with a lot of surface corro...
by Grayham
Wed Sep 23, 2015 4:35 pm
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

I think it was just the gasket stuck fast on both sides that was holding it. I put it all back together just to try it and the cylinder dropped in the hole nice and snug. The battery's gone flat on my vernier again. :roll: Using a tape measure, it looks like a 93mm hole in the crankcases. Is that st...
by Grayham
Tue Sep 22, 2015 8:29 pm
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

The piston's even got 88 stamped on it. :smile: A bit more improvisation; A bus shock absorber washer with two holes in it, two 1/4" UNF bolts and a three leg puller. https://lh3.googleusercontent.com/-qz3mmQszac4/VgGpyr0bInI/AAAAAAAAGYo/HROCFifwixE/s640-Ic42/IMG_20150922_150029931.jpg I couldn't ge...
by Grayham
Sat Sep 12, 2015 8:29 pm
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

The chrome on the frame is reasonably OK, apart from around the rear engine mount, so I'll probably just brush paint those couple of tubes as they can hardly be seen when the bike's built up. I've started stripping the engine and got a nice surprise when I took the head off. Despite the 9084 engine ...
by Grayham
Sat Sep 12, 2015 8:21 pm
Forum: Parts for sale
Topic: BSA victor 441 bsa b50 ccm £8000 ebay
Replies: 1
Views: 1170
Flag: Great Britain

Re: BSA victor 441 bsa b50 ccm £8000 ebay

Only about 25 miles from me. I don't know him, but he seems to have good feedback selling mostly earthmoving plant and old bike stuff. I really shouldn't be looking at that and calculating whether the value of the parts I want plus the price I could sell the surplus for is more than £8000. I've got ...
by Grayham
Fri Sep 11, 2015 2:57 pm
Forum: News
Topic: Members
Replies: 3
Views: 1056
Flag: Great Britain

Re: Members

What's the average number of bikes per member? :grin:
by Grayham
Thu Sep 10, 2015 2:37 pm
Forum: Tech
Topic: Non- return valve
Replies: 88
Views: 12355
Flag: Great Britain

Re: Non- return valve

Now that you mention it, I can't remember ever seeing nyloc nuts inside an engine.
I have seen this type though, available thick & thin, metric & imperial.
http://www.fastenright.com/aerotight-nuts
by Grayham
Wed Sep 09, 2015 8:40 pm
Forum: Tech
Topic: Non- return valve
Replies: 88
Views: 12355
Flag: Great Britain

Re: Non- return valve

Yeah, I thought there wasn't much thread engagement, but then, they're sold for holding hang gliders together. :shock:
by Grayham
Wed Sep 09, 2015 8:17 pm
Forum: Tech
Topic: Non- return valve
Replies: 88
Views: 12355
Flag: Great Britain

Re: Non- return valve

If it does turn out to be the nuts, these could be a solution.

http://www.avianonline.co.uk/nyloc-thin-p-1776.html

Image
by Grayham
Wed Sep 09, 2015 5:53 pm
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

Shock absorbers in bits. https://lh3.googleusercontent.com/-i2CUFC6kcZo/VfBiQF6QKsI/AAAAAAAAGQU/68Rj-69gOXo/s640-Ic42/IMG_20150909_160546798.jpg Steering head bearing coming off. I thought my little bicycle headset bearing puller might do it, but it was surprisingly tight and I had to use the big on...
by Grayham
Wed Sep 09, 2015 4:53 pm
Forum: Tech
Topic: Non- return valve
Replies: 88
Views: 12355
Flag: Great Britain

Re: Non- return valve

Put a dollop of plasticine on the pump, then fit and remove the case. The thickness of the plasticine will tell you how much clearance, if any, there is.
by Grayham
Tue Sep 08, 2015 3:27 am
Forum: Tech
Topic: BSP vs NPT/NPS threads
Replies: 1
Views: 671
Flag: Great Britain

Re: BSP vs NPT/NPS threads

BSPP is parallel, BSPT is tapered. It's common to see BSP and NPT threaded pipe connections mixed on trucks from new, or it was before they went to metric fittings. As tapered threads seal by jamming together, the mismatched threads just jam a bit sooner. It's a bit like derailleur gears on bicycles...
by Grayham
Mon Sep 07, 2015 2:55 pm
Forum: Project bikes
Topic: QUIZ TIME
Replies: 20
Views: 3595
Flag: Great Britain

Re: QUIZ TIME

Have you got a better picture of the cylinder head, there's definitely something strange going on there.
I've heard of CCM's experiments with a "five stroke" engine, although I've got no idea how it worked or what it looked like. Could that be it or could it be a rotary valve conversion?
by Grayham
Thu Sep 03, 2015 8:55 am
Forum: Tech
Topic: Using and painting old magnesium parts
Replies: 7
Views: 1505
Flag: Great Britain

Re: Using and painting old magnesium parts

It's always reassuring to get conflicting replies. If everyone gave the same answer, it would look like it was common knowledge and I'd feel foolish for not already knowing. Two votes for a general warning against using them and two votes for a more specific "I've done it and I'm still alive", so I'...
by Grayham
Thu Sep 03, 2015 8:45 am
Forum: Tech
Topic: B44 timing cover fasteners seized and rounded
Replies: 8
Views: 1637
Flag: Great Britain

Re: B44 timing cover fasteners seized and rounded

For the socket cap screws (Allen screws) you may be able to hammer in the next size up if they are rounded.
3/16" is about 4.8mm, so try a 5mm key. Torx bits are even better if you can find one the right size as the points of the star cut in to head to grip it.
by Grayham
Wed Sep 02, 2015 12:24 pm
Forum: Tech
Topic: Using and painting old magnesium parts
Replies: 7
Views: 1505
Flag: Great Britain

Using and painting old magnesium parts

I think I read a warning somewhere about the long term reliability of CCM magnesium fork yokes. How much of a risk is it using 30 year old magnesium yokes with no visible damage? Check them after every ride and scrap them as soon as a crack appears, or don't even chance it? What about painting the y...
by Grayham
Mon Aug 31, 2015 10:16 pm
Forum: Tech
Topic: Rear frame oil connection
Replies: 42
Views: 5334
Flag: Great Britain

Re: Rear frame oil connection

You can live in the '60s and take advice from those stuck in the '60s or fix 45 year old problems. I can just imagine anyone who worked at BSA at the time laughing at the way some people nowadays believe that the designers at Slumberglades Hall got it right first time and it can't be improved. :laugh
by Grayham
Mon Aug 31, 2015 10:05 am
Forum: Tech
Topic: Rear frame oil connection
Replies: 42
Views: 5334
Flag: Great Britain

Re: Rear frame oil connection

Is that really such a problem with modern detergent oils? As far as I know , every other engine ever designed circulates all its oil, why should some BSA unit singles be the odd one out? To get the best of both worlds, how about replacing that elbow with a T connector on its side? Oil comes in the t...
by Grayham
Sun Aug 30, 2015 11:08 pm
Forum: Tech
Topic: Rear frame oil connection
Replies: 42
Views: 5334
Flag: Great Britain

Re: Rear frame oil connection

If anyone asks, tell them a previous owner stripped the thread, so you had to tap it out bigger anyway. ;-)
by Grayham
Fri Aug 28, 2015 6:50 pm
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

Yes, I'll be replacing the seals complete. Progress has been slow lately as I've been doing some major repairs on my house while the weather's good. One job I got done was to get the swinging arm powder coated silver. I know it doesn't look quite right, but I'm restoring three bikes at once here, wh...
by Grayham
Fri Aug 28, 2015 6:33 pm
Forum: Tech
Topic: Flushing Castrol R out of a frame.
Replies: 8
Views: 1963
Flag: Great Britain

Re: Flushing Castrol R out of a frame.

Petrol it is then.
I'm guessing there's a similar tide line inside the frame, so it's definitely going to need some sort of circulation or agitation as well as just soaking.
I wonder if my Land Rover will run on a petrol/R mix to save throwing it away afterwards. :grin:
by Grayham
Thu Aug 27, 2015 9:38 am
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

OK thanks, I guess it gives you a handle to pull the rods out with.
I just wanted to try them out and prove they work first.
by Grayham
Wed Aug 26, 2015 9:32 pm
Forum: Tech
Topic: Flushing Castrol R out of a frame.
Replies: 8
Views: 1963
Flag: Great Britain

Flushing Castrol R out of a frame.

Any suggestions? It's been standing at least 20 years and I think it may have wet sumped. :razz: https://lh3.googleusercontent.com/-Cjlkzr_4c3Q/Vd4HPF5mVtI/AAAAAAAAGFs/vWjPTSAXgcI/s800-Ic42/IMG_20150826_192537004_HDR.jpg I can clean the engine easily enough, but how can I be sure of getting it all o...
by Grayham
Wed Aug 26, 2015 9:23 pm
Forum: Project bikes
Topic: 1976 CCM 500
Replies: 50
Views: 8366
Flag: Great Britain

Re: 1976 CCM 500

Some small progress and my first attempt at engineering, with help.
I've made a tool to grip the shock absorber shaft to allow me to undo the mounting eyes.

Image
by Grayham
Wed Aug 19, 2015 12:15 pm
Forum: Parts & Bikes wanted
Topic: Most of a Victor GP
Replies: 4
Views: 1173
Flag: Great Britain

Re: Most of a Victor GP

Thanks for the info on the tank. I'm not really at the stage were I need a fuel tank, I just bought it because it turned up at a reasonable price and I wasn't aware they were different. I'd found Mojo's web site while looking for Victor stuff and will get in touch with them at some point. They're on...
by Grayham
Sun Aug 16, 2015 5:39 pm
Forum: Tech
Topic: valve clearances
Replies: 18
Views: 2919
Flag: Great Britain

Re: valve clearances

Which expands more, a very hot steel valve or a not quite so hot aluminium head and rocker box? What happens when you take in to account the steel cylinder studs and aluminium push rods?
Does the gap change much from cold to hot?
by Grayham
Thu Aug 13, 2015 9:46 am
Forum: Tech
Topic: Dating certificate
Replies: 6
Views: 1320
Flag: Great Britain

Re: Dating certificate

by Grayham
Tue Aug 11, 2015 10:03 pm
Forum: Parts for sale
Topic: CCM moto x tank (alloy)
Replies: 26
Views: 5331
Flag: Great Britain

Re: CCM moto x tank (alloy)

by Grayham
Sun Aug 09, 2015 8:45 pm
Forum: Project bikes
Topic: B50 MX for Bonneville
Replies: 420
Views: 54935
Flag: Great Britain

Re: B50 MX

Looks like a Nitrous Oxide kit to me, not that I really know what a nitrous oxide kit actually looks like.
Is there a button on the handlebars wired in to it?
by Grayham
Sat Aug 08, 2015 10:04 am
Forum: Parts & Bikes wanted
Topic: Most of a Victor GP
Replies: 4
Views: 1173
Flag: Great Britain

Re: Most of a Victor GP

Funny you should ask, as this arrived today. http://www.ebay.co.uk/itm/291529528761 http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/B04AAOSwu4BVvjrs/$_12.JPG I've also bought a square barrel B44 engine and an abandoned C15 trials project as it had the correct rear hub and drum/sprocket, then, while rummagi...