Search found 1163 matches

by Canberra
Fri Apr 03, 2020 6:22 am
Forum: Tech
Topic: Frame Geometry
Replies: 10
Views: 339
Flag: Australia

Re: Frame Geometry

On the BSA frame drawing the datum is through the center of the swinging arm pivot and is parallel to the lower top tube. In no way I would consider that is parallel to the ground. I assume all B50 frames are same. In that case that datum would never relate to the ground as the MX has 21 inch front ...
by Canberra
Wed Jan 08, 2020 12:48 pm
Forum: Tech
Topic: Spacer tube for tank fixing
Replies: 6
Views: 775
Flag: Australia

Re: Spacer tube for tank fixing

The length of the tube relates to the tank rubbers under the tank and the o-ring. I had to customise mine as I use two thicker rubbers and I also use a wedge shaped washer to straighten up the screw when it is in the frame. The original B50H design included that.

John
by Canberra
Wed Jan 08, 2020 12:42 pm
Forum: Tech
Topic: Bsa MX cam
Replies: 2
Views: 531
Flag: Australia

Re: Bsa MX cam

Hi Webby,

Just checking -2 or 4 valve engine?

John
by Canberra
Thu Dec 12, 2019 2:07 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 1978
Flag: Australia

Re: Fitting Allen screws to rocker box on B50.

Hi mlb50. There were DVDs created on the P92 and supplied by a site member (see here ) . Not sure if there are any more around. They are interesting as they show quite a few welcome upgrades to the original engine. Sadly they never made it to production. Search on the P92 topic (see here ) . John Ed...
by Canberra
Thu Dec 12, 2019 2:02 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 1978
Flag: Australia

Re: Fitting Allen screws to rocker box on B50.

Without digging out my drawing what are the reference S holes? They are the ones for the head steady. If they are helicoiling the outer holes why not those? They take more stress than the outer holes.

John
by Canberra
Sat Dec 07, 2019 1:57 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 1978
Flag: Australia

Re: Fitting Allen screws to rocker box on B50.

Engineering practice in Aluminium is coarse thread. My experience is in huge aluminium covers which are automatically fitted with helicoils for added strength and better wear on disassembly/reassembly with steel on steel thread contact instead of steel screw and bare aluminium. I do realise that wha...
by Canberra
Fri Dec 06, 2019 1:22 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 1978
Flag: Australia

Re: Fitting Allen screws to rocker box on B50.

As far as I am aware B50 had UNC in the head and UNF on the nuts. I have a CCM head with socket cap screws which recess into the rocker box. You just need to be aware different bolt manufacturers use different head dimensions if you have to replace any. I had a thread give way and used helicoils. I ...
by Canberra
Sat Nov 02, 2019 1:39 pm
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

Looks like a repeat of a previous year's result with South Africa :oops: . Big :oops: !

Better luck next time.
by Canberra
Sun Oct 27, 2019 12:45 pm
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

Poop. No more Wales. Looks like I'll have to support England :roll:

John
by Canberra
Sun Oct 27, 2019 6:58 am
Forum: Tech
Topic: Indicator anomaly
Replies: 5
Views: 3038
Flag: Australia

Re: Indicator anomaly

Totally agree. Do not rely on the standard BSA wiring where they used the frame as the earth. I run extra earths back to a common point. The indicators are very prone to poor earths, especially from the front lights.

John
by Canberra
Sun Oct 27, 2019 6:54 am
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

A good question, I'll buy it?

It was a great match, worthy of a final. Maybe one advantage was the coach and his background on Kiwi. This time I'm following my forefathers and looking for a welsh win next.

John
by Canberra
Wed Sep 11, 2019 11:01 am
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

With all the ups and downs from both sides, the fifth test will be interesting. I certainly wouldn't bet on the outcome :roll: .

The ladies game is a better bet :thumb .

With the rugby in Japan we'll both be aiming to make a dent against the cousins across the ditch.
by Canberra
Wed Sep 11, 2019 10:53 am
Forum: Parts & Bikes wanted
Topic: Seat Base
Replies: 0
Views: 1463
Flag: Australia

Seat Base

Is there a source for seat pans? I am looking for one to fit a B50SS with 3 gallon tank.

My existing seat foam is a bit tatty and have a new cover but the metal pan is corroded around the edges.

Alternately anyone with a good seat complete for sale?

John
by Canberra
Thu Aug 29, 2019 11:26 am
Forum: Tech
Topic: Rough rear wheel rebuild offset
Replies: 2
Views: 1062
Flag: Australia

Re: Rough rear wheel rebuild offset

Thanks Midgie, I was trying to cheat using this rough measurement method as shown before striping the wheel back out the frame. As each rim varies in width so the 1 7/8 is also not perfect measurement, I checked with a straight bar across either side of the tyre to the rear subframe so that I was ch...
by Canberra
Tue Aug 27, 2019 12:45 pm
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

I was trying not to say something :cry: :cry:

It'll make the next game interesting.

John
by Canberra
Sun Aug 25, 2019 11:52 am
Forum: Int BSA Rally and other meetings
Topic: National bsa Rally South Australia
Replies: 8
Views: 3163
Flag: Australia

Re: National bsa Rally South Australia

Hi Trevor, Somehow I doubt if it'll actually be retirement. Maybe a change of jobs - some paid, some not so paid.. Alternately, maybe I'll just become an old fart. So far it looks like I'll be renewing my machine maintenance skills for getting older items working to go to developing countries. It wo...
by Canberra
Sun Aug 25, 2019 1:22 am
Forum: Tech
Topic: Final Drive Sprocket
Replies: 21
Views: 3308
Flag: Australia

Re: Final Drive Sprocket

I'm assuming the seal is in the right way round? Sprung lip to the inside.

If there is a burr on the split bush it can cut the seal.

Some replacement seals are rubber on outside and can move due to pressure of the felt washer if it is too thick. That is why I went with a metal case seal.

John
by Canberra
Sat Aug 24, 2019 2:07 pm
Forum: Int BSA Rally and other meetings
Topic: National bsa Rally South Australia
Replies: 8
Views: 3163
Flag: Australia

Re: National bsa Rally South Australia

Thanks, Lynn is thinking of keeping working for awhile longer, so I expect her to keep me in the way I deserve. Maybe a year or two before we get to do a world trip again. It would be good to both have time to meander, meanwhile I have a few other plans lined up.

John
by Canberra
Sat Aug 24, 2019 1:58 pm
Forum: Tech
Topic: Rough rear wheel rebuild offset
Replies: 2
Views: 1062
Flag: Australia

Rough rear wheel rebuild offset

I have taken the rear of my B50SS apart to check the alignment of the center of the rim versus the center of the frame and have found I need to readjust the rear rim on the wheel. I have a WM3 on the SS so the only setup that can be comparable is on the B50T. The MX does not have a speedo drive so I...
by Canberra
Sat Aug 24, 2019 1:34 pm
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

Another day and this may be off topic and have to be moved by the Moderator into Tales of Woe section. :ban :laugh .
by Canberra
Sat Aug 24, 2019 9:09 am
Forum: Tech
Topic: Final Drive Sprocket
Replies: 21
Views: 3308
Flag: Australia

Re: Final Drive Sprocket

The handy sprocket nut socket! Has been used a few times now and only way you can torque up the nut properly.
B50 Gearbox Drive sprocket socket.JPG
Had to weld a couple of sockets together but need to be careful you clear all the shaft
John
by Canberra
Sat Aug 24, 2019 9:02 am
Forum: Tech
Topic: Replacing gear box main oil seal
Replies: 4
Views: 1058
Flag: Australia

Re: Replacing gear box main oil seal

1971/2 B50 and earlier B44 parts books lists it as 40-0243. I just took one into bearing shop and got a replacement with a metal outer - I cannot remember the number.

John
by Canberra
Sat Aug 24, 2019 8:48 am
Forum: Parts for sale
Topic: Correct length for B25SS tank center bolt.
Replies: 7
Views: 1443
Flag: Australia

Re: Correct length for B25SS tank center bolt.

That wedge. My version: B50SS tank bolt assembly.JPG It is listed for the H model 82-9795 (part 33) but is hens teeth to find one. They are handy as they keep the center bolt upright as you mount the tank As an aside - have never actually seen a B50SS with B50H as the engine/frame number - do they e...
by Canberra
Fri Aug 23, 2019 3:12 pm
Forum: Int BSA Rally and other meetings
Topic: National bsa Rally South Australia
Replies: 8
Views: 3163
Flag: Australia

Re: National bsa Rally South Australia

Sorry, not this year for Lynn and I. I gather they are going to use it as a trial for the International. Some BSA friends from Canberra will be there. I need to be at work so I can retire just after my birthday that same week and family want to celebrate both events that same weekend as the rally. J...
by Canberra
Fri Aug 23, 2019 2:41 pm
Forum: Parts for sale
Topic: Correct length for B25SS tank center bolt.
Replies: 7
Views: 1443
Flag: Australia

Re: Correct length for B25SS tank center bolt.

It also depends on what mounting rubbers you are using. On my B50SS with large tank I am using two thicker rubbers so I had to manufacture a longer bolt and longer tube. I like the tank slightly higher so it doesn't sit on the rats nest wiring and wear out the insulation. I bought new components and...
by Canberra
Tue Aug 06, 2019 1:47 pm
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

I didn't want to say I told you so :lol:

Still a few more to go before we take the Urn.
by Canberra
Sat Jul 20, 2019 9:10 am
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

Best we don't talk about the women's side yet. :ban
by Canberra
Sat Jul 13, 2019 3:12 pm
Forum: Tech
Topic: Misfiring while driving. Starts and idles Okay
Replies: 14
Views: 2115
Flag: Australia

Re: Misfiring while driving. Starts and idles Okay

You mention you still have ye olde points, maybe the points capacitor?
by Canberra
Sat Jul 13, 2019 3:06 pm
Forum: Off topic
Topic: Anyone for cricket?
Replies: 24
Views: 3995
Flag: Australia

Re: Anyone for cricket?

We lulling the opposition into a sense they think they have it in the bag for the ashes.

John
by Canberra
Fri May 31, 2019 6:10 am
Forum: Tech
Topic: B44 Alternator Repair
Replies: 7
Views: 2186
Flag: Australia

Re: B44 Alternator Repair

I believe the rotors that were prone to failures on earlier engines were replaced by a modified unit. So only replace with a new rotor and don't look at a second hand one. I think the magnets are stronger as I gather the originals loose magnetism over time and so alternator doesn't produce as much p...
by Canberra
Mon Apr 29, 2019 2:37 pm
Forum: Tech
Topic: Kick-start aid
Replies: 8
Views: 2244
Flag: Australia

Re: Kick-start aid

I'm guessing, only when the scrumpy is flowing :ok

The kick start aid is matched for the starting a twin, no information on a 500-600cc single?

John
by Canberra
Sun Apr 28, 2019 3:33 am
Forum: Int BSA Rally and other meetings
Topic: All British rally
Replies: 17
Views: 4801
Flag: Australia

Re: All British rally

Beat, lot more than your outfit!

The standard 2010 SE is 225kgs wet so not nicest if it falls over. I have top box so a bit heavier. I see the new 2019 version has lost about 15kgs (must have more plastic).

Bit more than my B50SS which is probably around the 165kgs wet.

John
by Canberra
Sun Apr 28, 2019 3:16 am
Forum: Off topic
Topic: Star
Replies: 262
Views: 45904
Flag: Australia

Re: Star

Impressive :shock:
by Canberra
Fri Apr 26, 2019 1:46 am
Forum: Off topic
Topic: Star
Replies: 262
Views: 45904
Flag: Australia

Re: Star

Runs sweet - My guess - 220kgs with fuel?
by Canberra
Fri Apr 26, 2019 1:39 am
Forum: Int BSA Rally and other meetings
Topic: All British rally
Replies: 17
Views: 4801
Flag: Australia

Re: All British rally

Thanks guys. Beat, I believe your new outfit has less weight. Made worse as I had just filled it up with petrol and left the service station. The Bonneville SE version are nice bikes to ride but I agree a bit of a lump to push around. Certainly not as light as the B50 although the SE has lower seat ...
by Canberra
Thu Apr 25, 2019 5:23 am
Forum: Int BSA Rally and other meetings
Topic: All British rally
Replies: 17
Views: 4801
Flag: Australia

Re: All British rally

One day I will get down there. Weather seems to be great for the event as well this year. Hope everyone has a good time. I know a few go from the Canberra club. I'm a bit laid up anyway recovering from a cracked femur at the hip when the Bonneville fell over on me at a junction after I did an emerge...
by Canberra
Wed Apr 10, 2019 2:44 am
Forum: Tech
Topic: Big tank for 1971 B25T
Replies: 30
Views: 5566
Flag: Australia

Re: Big tank for 1971 B25T

The B50SS(H) 3 gallon tank with the tank strap was a contoured wire strap with plates welded to the ends to mate with the angled screw housings welded on the tank. The contours were to ensure the strap didn't foul the top of the 500 engine as there is not a lot of room in that area. Using the 3 gall...
by Canberra
Wed Feb 13, 2019 1:09 pm
Forum: Tech
Topic: Electric Start
Replies: 631
Views: 131669
Flag: Australia

Re: Electric Start

Doug Fraser uses the valve lifter to start his electric start B50. There is a u-tub video of his many special bikes being started.

John
by Canberra
Wed Feb 13, 2019 1:03 pm
Forum: Tech
Topic: Valve sticking conundrum
Replies: 8
Views: 1810
Flag: Australia

Re: Valve sticking conundrum

The only time I had one of my valves stick was immediately after a rebuild when I used light grease on the valve stem. I figure it stopped the oil getting through on initial start up. I reassembled using engine oil and no problem.
by Canberra
Wed Feb 13, 2019 12:58 pm
Forum: Tech
Topic: Prop stand
Replies: 13
Views: 2780
Flag: Australia

Re: Prop stand

Has anyone found a modern forged prop stand that could replace the original poorly constructed bit of water-pipe?