Search found 96 matches

by youngjohn
Sun Sep 13, 2015 10:28 am
Forum: Tech
Topic: Air filter hose
Replies: 3
Views: 1162

Re: Air filter hose

Put it in a (large) cup of boiling water for a couple of minutes first, and then its soft enough to manouvre into place. You've got to be quick though.
by youngjohn
Sun Aug 09, 2015 2:40 pm
Forum: Tech
Topic: Amal Premier carb
Replies: 8
Views: 2134

Re: Amal Premier carb

I've had a couple of Premiers, one for the BSA and another for a Vincent Comet. Both have been pretty much spot on in terms of running, and they are really nice quality but Burlen can be a bit flaky when it comes to getting the order right. My B50 carb was sent set up for a T140 Bonneville (???) but...
by youngjohn
Sat Aug 08, 2015 5:10 pm
Forum: Tech
Topic: Amal Premier carb
Replies: 8
Views: 2134

Re: Amal Premier carb

Put a Premier concentric on my B50ss and very pleased with it. All settings the same as your list other than a 19 pilot jet to reduce the popping through a peanut exhaust. Took a while to arrive though, about 8 weeks!
by youngjohn
Sun Aug 02, 2015 5:13 pm
Forum: Tech
Topic: B50 Slight Pinking
Replies: 17
Views: 2757

Re: B50 Slight Pinking

koncretekid wrote: PS. And how do you know you're really at 32º? The rotor could be marked wrong.
Checked the marks with a degree disc.

Think I'll try backing it off a little more and see what happens.
by youngjohn
Sat Aug 01, 2015 11:50 pm
Forum: Tech
Topic: B50 Slight Pinking
Replies: 17
Views: 2757

Re: B50 Slight Pinking

midgie wrote:good luck with the boyer ! :laugh

Tell me more...
by youngjohn
Sat Aug 01, 2015 9:43 pm
Forum: Tech
Topic: B50 Slight Pinking
Replies: 17
Views: 2757

B50 Slight Pinking

My B50s is running on Super Unleaded (97) with a good splash of octane booster, and I strobed the timing at 34 degrees. It's running a Mk3 Boyer. I'm getting a little burst of pinking if I open the throttle wide at 50ish in top gear. It goes away almost instantly as the revs increase to match the th...
by youngjohn
Sat Jul 04, 2015 10:20 pm
Forum: Tech
Topic: B50 Gearbox Oil Level
Replies: 2
Views: 892

Re: B50 Gearbox Oil Level

Thanks!
by youngjohn
Sat Jul 04, 2015 4:18 pm
Forum: Tech
Topic: B50 Gearbox Oil Level
Replies: 2
Views: 892

B50 Gearbox Oil Level

Is the oil level measured with the dipstick fully screwed in or just resting on the hole?
by youngjohn
Thu Jun 18, 2015 12:03 am
Forum: Parts & Bikes wanted
Topic: 60mm Speedo & Mounting Bracket Wanted
Replies: 0
Views: 1334

60mm Speedo & Mounting Bracket Wanted

Has anyone got a nice 60mm speedo and mounting bracket from a b25ss that they are prepared to sell?
by youngjohn
Sat Jun 13, 2015 11:02 pm
Forum: Tech
Topic: B50 chaincase/crankcase breather hole gauze
Replies: 1
Views: 732

B50 chaincase/crankcase breather hole gauze

Is there a part number for the small brass circular gauze screen that goes between the crankcase and chaincase and does anyone supply them? Can't find any reference to this part anywhere.
by youngjohn
Tue Jun 09, 2015 7:37 pm
Forum: Tech
Topic: B50 Clutch Plates - Order
Replies: 1
Views: 646

B50 Clutch Plates - Order

On the standard B50 clutch, is it correct that the first plate to go in the basket is a friction plate and the last plate to go in before the pressure plate is a plain steel one?
by youngjohn
Tue Jun 09, 2015 1:07 pm
Forum: Tech
Topic: PES Clutch Question
Replies: 30
Views: 5845

PES Clutch Question

Does the PES B50 clutch need a different mainshaft or dies it use the standard one?
by youngjohn
Sun Jun 07, 2015 8:50 pm
Forum: Tech
Topic: B50 Mainshaft Endfloat - Please Explain...
Replies: 1
Views: 667

B50 Mainshaft Endfloat - Please Explain...

Probably a stupid question with a simple answer, but can someone explain to me if/how the mainshaft on a B50 can have any end float as it seems to be bolted up solid to the bearing on the timing side inner cover where the kickstart pinion is fitted? I can't understand how it could move sideways at a...
by youngjohn
Thu Jun 04, 2015 10:51 pm
Forum: Tech
Topic: B50 Primary Chain
Replies: 4
Views: 1212

B50 Primary Chain

Fitted a new primary chain to the B50. It's marked Renolds and came from Burton Bike Bits.
I've had to leave the tensioner out altogether and make up a couple of spacers for the alternator as the chain only just has 1/4" play without it.
Anyone else had the same problem?
by youngjohn
Thu May 28, 2015 4:16 pm
Forum: Tech
Topic: B25ss tyres
Replies: 7
Views: 1999

Re: B25ss tyres

You're dead right - it's a K70 on the back and a Chinese K70 on the front - brain fade with age I think...
I got a new 3.50 Chinese K70 form eBay for the front but the rear was on the bike and is newish and in good nick.
by youngjohn
Thu May 28, 2015 9:38 am
Forum: Tech
Topic: B25ss tyres
Replies: 7
Views: 1999

Re: B25ss tyres

My B50ss has a 4.00 Dunlop K82 on the back and a Chinese 3.50 K82 copy on the front. No clearance issues (although the front is quite close to the wire stays) and to me, it looks much better than the original skinny tyres. Grip and handling are great. http://i1159.photobucket.com/albums/p623/youngjo...
by youngjohn
Wed May 20, 2015 10:32 am
Forum: Suppliers and New Products
Topic: Chrome platers
Replies: 7
Views: 2981

Re: Chrome platers

£50 sounds about right to me.
Quality Chrome in Hull are very good, but they're not cheap.
by youngjohn
Tue May 05, 2015 12:38 am
Forum: Tech
Topic: Conical Brake Brilliant!
Replies: 13
Views: 3628

Re: Conical Brake Brilliant!

Richard Hunt wrote: In my experience (on my B50) only if you have decent brake pad material on your brake shoes - Emgo brake shoes haven't :(
Rich
Luckily my shoes were original Lockheeds and barely used. Quick rough-up with a sanding block and they were good to go.
by youngjohn
Mon May 04, 2015 6:06 pm
Forum: Tech
Topic: Conical Brake Brilliant!
Replies: 13
Views: 3628

Conical Brake Brilliant!

Good news story - Just stripped, cleaned and lubricated my B50's previously useless 8" conical brake and it now chirps the tyre at 30mph.
One of the arms was practically seized and the whole thing was dry and full of dust.
Cracking brake now, what a difference.
by youngjohn
Mon Apr 20, 2015 5:05 pm
Forum: Tech
Topic: Odd Clutch Problem
Replies: 8
Views: 1669

Re: Odd Clutch Problem

I've replaced the springs and there is no clutch slip at all. Still got the problem, after 2-3 miles of working perfectly the clutch arm on the engine develops slack which amounts to about 5mm at the cable. It's at the arm, so it's not the cable at fault. This happens instantly, not gradually. At th...
by youngjohn
Mon Apr 20, 2015 10:53 am
Forum: Tech
Topic: B50 Timing - 31/34 Degrees
Replies: 5
Views: 1313

Re: B50 Timing - 31/34 Degrees

kommando wrote:You have to assume when they changed the timing they also changed the drilling on the crank to suit.
Apparently not, as they sent a service bulletin out telling dealers to time the ignition between the rotor mark and the edge of the raised boss that it sits on.
by youngjohn
Mon Apr 20, 2015 12:48 am
Forum: Tech
Topic: B50 Timing - 31/34 Degrees
Replies: 5
Views: 1313

Re: B50 Timing - 31/34 Degrees

try it john, if it seems a bit retarded just adjust the points backplate in an anti clock direction, some are good timed at how you did it some are not. Is the timing tool hole in the crank set at 31 degrees? If so will it be a case of advancing it clockwise a fraction to get to 34 degrees? When I ...
by youngjohn
Sun Apr 19, 2015 5:26 pm
Forum: Tech
Topic: B50 Timing - 31/34 Degrees
Replies: 5
Views: 1313

B50 Timing - 31/34 Degrees

Just been reading through some old posts and I came across this: hi Dave. welcome to the forum. don't know anything about the offset. just used the screw in timing tool last week to check the mark on my new alternator rotor. it was spot on. that means the mark on the rotor is 31deg. the timing spec ...
by youngjohn
Sun Apr 12, 2015 10:19 pm
Forum: Tech
Topic: Odd Clutch Problem
Replies: 8
Views: 1669

Re: Odd Clutch Problem

Clutch is slipping a little and over heating the plates. As the clutch pack becomes thicker the clearance increases. I dont think it is this if the OPs problem is the same that I had on my Blazer, I would have travelled miles with no problem than all of a sudden, not gradually, but in one release o...
by youngjohn
Sat Apr 11, 2015 12:03 am
Forum: Tech
Topic: Odd Clutch Problem
Replies: 8
Views: 1669

Re: Odd Clutch Problem

Mark Cook wrote:Clutch is slipping a little and over heating the plates. As the clutch pack becomes thicker the clearance increases.
An excellent theory. I put some new clutch springs in and they seemed pretty weedy, so I have replaced them with the original much stronger springs and will test it out tomorrow.
by youngjohn
Fri Apr 10, 2015 2:58 pm
Forum: Tech
Topic: Odd Clutch Problem
Replies: 8
Views: 1669

Re: Odd Clutch Problem

Hi,I know this sounds obvious, but I would be checking the cable run. Maybe it is getting snagged under the tank or on the fork yokes? Steve I though that, but when the clutch lever has extra play, the small arm on the engine has moved in a bit from its normal position so it must be something in th...
by youngjohn
Fri Apr 10, 2015 1:09 pm
Forum: Tech
Topic: Odd Clutch Problem
Replies: 8
Views: 1669

Odd Clutch Problem

The clutch on my B50 has an odd problem. All works fine but when riding the bike, every so often the clutch cable develops about 5mm of extra play. Then after a short while, it goes back to normal on its own. It's not the cable at fault, as the arm on the engine is sitting a bit further in when it's...
by youngjohn
Fri Apr 03, 2015 4:00 pm
Forum: Tech
Topic: B50 clutch rebuild ground to a halt..
Replies: 8
Views: 1539

Re: B50 clutch rebuild ground to a halt..

Here is a link to Peter's(bsaunitsingle.com) parts book page for the B50. You want pages 21 and 22. You are looking at the sprocket end of the Mainshaft Top Gear, part number 57-3872. The slot you are seeing in actually one of two bushings(41-3045) that are pushed into the Mainshaft Top Gear. The g...
by youngjohn
Fri Apr 03, 2015 2:43 pm
Forum: Tech
Topic: B50 clutch rebuild ground to a halt..
Replies: 8
Views: 1539

B50 clutch rebuild ground to a halt..

Set aside a day to replace clutch seal, rubbers and rollers. Got started and then I've ground to a halt as the screws that hold the front and rear retaining plates needed drilling out of the rear plate. Three went well but the last one has caught the threads. There is also a bit of wear on the rear ...
by youngjohn
Thu Apr 02, 2015 11:18 pm
Forum: Project bikes
Topic: B50 Just About Done - For Now
Replies: 3
Views: 1526

B50 Just About Done - For Now

Just about done for now, thanks to extensive help and advice from this forum. Fitted an Armours exhaust pipe and Peanut silencer today (£150 delivered). Needed a bit of fettling to fit, but overall it's pretty good quality. Tomorrow I'm going to replace the gearbox oil seal, seal behind the clutch (...
by youngjohn
Wed Mar 18, 2015 12:30 pm
Forum: Tech
Topic: Engine Sprocket Removal - Bolt Thread Size
Replies: 4
Views: 1224

Re: Engine Sprocket Removal - Bolt Thread Size

That's great, thanks.
by youngjohn
Mon Mar 16, 2015 12:47 am
Forum: Tech
Topic: Engine Sprocket Removal - Bolt Thread Size
Replies: 4
Views: 1224

Engine Sprocket Removal - Bolt Thread Size

Can someone tell me the thread size of the 2 'puller holes' on the engine sprocket? I'm away at the moment but need to get a couple of bolts sorted for when I get back. Can't find a BSA type puller so I'm planning to pull it off with a 2 leg puller on the heads of 2 bolts screwed into the holes. Tha...
by youngjohn
Wed Mar 11, 2015 11:45 am
Forum: Tech
Topic: Locking Gearbox Sprocket
Replies: 2
Views: 743

Locking Gearbox Sprocket

What's the best way to lock a B50 gearbox sprocket in order to loosen the nut?
The engine is in the bike.
Thanks.
by youngjohn
Sun Mar 08, 2015 12:20 am
Forum: Tech
Topic: B50 Exhaust Pipe To Head Fit
Replies: 1
Views: 761

B50 Exhaust Pipe To Head Fit

The exhaust pipe on my B50ss only fits into the head to a depth of about about 1/2 inch. I'm pretty sure that the pipe is the original and it's not bent or damaged so it's probably been like that for the 11,000 miles that the bike has done. Head port is round and undamaged and I've sealed it with Pe...
by youngjohn
Wed Mar 04, 2015 11:18 pm
Forum: Tech
Topic: B50 Clutch Locking Tool
Replies: 8
Views: 1630

Re: B50 Clutch Locking Tool

Doh... Just dawned on me that the chain adjuster would be removed before the nuts were loosened. Scrub that question.
As a matter of interest, how do others lock the clutch/engine sprocket?
by youngjohn
Wed Mar 04, 2015 3:26 pm
Forum: Tech
Topic: B50 Clutch Locking Tool
Replies: 8
Views: 1630

B50 Clutch Locking Tool

I bought a clutch locking tool and it's a flat plate which locks the inner to the basket, but there's no handle or bar to hold and stop the whole thing rotating when loosening the nut. Can't find one with a bar attached. Is it safe to use this plate and prevent the rotation by 'jamming' the chain? I...
by youngjohn
Mon Mar 02, 2015 12:23 am
Forum: Tech
Topic: B50 Cam/Cam followers Lubrication
Replies: 6
Views: 1559

Re: B50 Cam/Cam followers Lubrication

anyone ever had problems with this lubricating ? any pictures of the " result " ? beat <201 I'm sure that BSA knew what they were doing, just seems a small amount of oil to lubricate all that stuff. I've been used to bikes with more 'specific' cam oiling, having a central feed that exits through th...
by youngjohn
Sun Mar 01, 2015 1:36 am
Forum: Tech
Topic: B50 Cam/Cam followers Lubrication
Replies: 6
Views: 1559

B50 Cam/Cam followers Lubrication

Quick question - are the B50 Cam & followers only lubricated by the oil draining down from the rocker feed?
by youngjohn
Mon Feb 16, 2015 11:22 pm
Forum: Tech
Topic: B50 Clutch Rocking
Replies: 6
Views: 1483

Re: B50 Clutch Rocking

skippy wrote:Mine does that I haven't worried about it. I thought it was normal.

That'll do for me!
by youngjohn
Mon Feb 16, 2015 7:53 pm
Forum: Tech
Topic: B50 Clutch Rocking
Replies: 6
Views: 1483

Re: B50 Clutch Rocking

Not sure, I haven't taken it to bits yet. The clutch basket rocks in and out a bit (as you look straight at it) when you put the clutch in. I would have thought it would be play on the rollers which would cause this, can't find anything on B50's but searching the internet suggests BSA's tend to do t...