Search found 1175 matches

by midgie
Wed Jul 01, 2020 11:36 am
Forum: Parts & Bikes wanted
Topic: B50 MX Camshaft wanted
Replies: 4
Views: 120
Flag: England

Re: B50 MX Camshaft wanted

Or genuine BSA new old stock from midgie.
by midgie
Sat Jun 13, 2020 5:59 pm
Forum: Project bikes
Topic: T 25 Project
Replies: 6
Views: 301
Flag: England

Re: T 25 Project

Looks a great little project, correct with the date code Nov 70.
by midgie
Tue Jun 02, 2020 9:05 am
Forum: Tech
Topic: B40 triple clamp material
Replies: 13
Views: 506
Flag: England

Re: B40 triple clamp material

minetymenace wrote:
Tue Jun 02, 2020 8:58 am
I know that midgie, but this is the Unit Singles forum.... :oops: :cool: :mrgreen: :thumb
I just figured you need all the help you can get :laugh
by midgie
Mon Jun 01, 2020 8:58 pm
Forum: Tech
Topic: B40 triple clamp material
Replies: 13
Views: 506
Flag: England

Re: B40 triple clamp material

minetymenace wrote:
Mon Jun 01, 2020 12:35 pm
All '71 and later OIF bikes had Aluminium fork yokes.
Apart from the 71 oif twins of course.
by midgie
Mon Jun 01, 2020 7:19 pm
Forum: Project bikes
Topic: Where was it made?
Replies: 11
Views: 528
Flag: England

Re: Where was it made?

I have a fleetstar motor on the bench now, rebuilding it for a friend.NG 02830 OCT 71 date code, this one has seen some action!
by midgie
Fri May 08, 2020 3:56 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 47
Views: 1866
Flag: England

Re: B25 SS CV19 project

I have spent some time today looking through the box of bits that came with the machine. I notice that the fork stanchions are slightly pitted. Is a re-chrome and grind economically feasible when there seems to be new items readily available for about £80/pair?? The only usable thing left of the se...
by midgie
Mon May 04, 2020 10:41 pm
Forum: Tech
Topic: B50 rotor nut.
Replies: 9
Views: 1334
Flag: England

Re: B50 rotor nut.

I have b50 cranks here that are 5/8 x 20 tpi and 5/8 x 18 tpi . The parts book list's the nut as 5/8 unf but not all are!
by midgie
Tue Apr 07, 2020 9:19 pm
Forum: Tech
Topic: Front Brake Stay/Fork?
Replies: 19
Views: 1039
Flag: England

Re: Front Brake Stay/Fork?

minetymenace wrote:
Tue Apr 07, 2020 2:07 pm
Thanks for putting us straight midgie, what took you so long? :thumb
I was enjoying it!
by midgie
Tue Apr 07, 2020 2:04 pm
Forum: Tech
Topic: Front Brake Stay/Fork?
Replies: 19
Views: 1039
Flag: England

Re: Front Brake Stay/Fork?

Its a later bsa/tri slider for the models that only used the 8" conical front hub.
by midgie
Tue Mar 31, 2020 10:06 pm
Forum: Tech
Topic: Firing Up tr5 For First Time In Years
Replies: 19
Views: 1534
Flag: England

Re: Firing Up tr5 For First Time In Years

I would strip the motor now, and clean the frame out then you know for sure that all is well. Firing it up without doing this could be costly.
by midgie
Fri Mar 06, 2020 2:23 pm
Forum: This Forum
Topic: TR5mx
Replies: 2
Views: 2122
Flag: England

Re: TR5mx

The tr5mx is a bsa all but tank badge, and made at bsa, so no problem.
by midgie
Fri Mar 06, 2020 2:21 pm
Forum: Tech
Topic: B50ss verses B50mx Frame
Replies: 6
Views: 1049
Flag: England

Re: B50ss verses B50mx Frame

Yes the long footrest bolt is 7/16" dia on the 73 mx/tr5mx/tr5t, up to 72 models they are 3/8".
by midgie
Thu Mar 05, 2020 4:11 pm
Forum: Parts & Bikes wanted
Topic: B50 parts
Replies: 2
Views: 567
Flag: England

Re: B50 parts

I think I have a spare l/h switch .
by midgie
Thu Mar 05, 2020 4:08 pm
Forum: Tech
Topic: B50ss verses B50mx Frame
Replies: 6
Views: 1049
Flag: England

Re: B50ss verses B50mx Frame

The 73 mx frame has beefed up seat mounting and rear mudguard mounting brackets, and no electric box brackets the same as the 71/72 mx version. As well as 3/8" bolt holes for the rear engine plates as opposed to the rest which are 5/16".
by midgie
Wed Mar 04, 2020 8:39 am
Forum: Tech
Topic: Rocker Box contents - interchangeability?
Replies: 6
Views: 1001
Flag: England

Re: Rocker Box contents - interchangeability?

The adjuster screw did change, these are longer on b50 than others, Steve is correct, part number did not change on the exhaust rocker arm.
by midgie
Tue Mar 03, 2020 9:24 pm
Forum: Tech
Topic: Rocker Box contents - interchangeability?
Replies: 6
Views: 1001
Flag: England

Re: Rocker Box contents - interchangeability?

Exhaust rocker arm is the only difference on the B50, shafts and inlet arm are the same from c15/b40/b44. The only difference on the B50 arm is the pad which contacts the valve lifter spindle is larger.
by midgie
Sat Feb 29, 2020 5:10 pm
Forum: Requests
Topic: B25 oil pump worm gear removal
Replies: 5
Views: 2523
Flag: England

Re: B25 oil pump worm gear removal

Remove the oil pump drive gear also, this will give more room.
by midgie
Sat Feb 29, 2020 4:24 pm
Forum: Requests
Topic: B25 oil pump worm gear removal
Replies: 5
Views: 2523
Flag: England

Re: B25 oil pump worm gear removal

You wont get the puller legs behind the worm gear, the legs need to be thin enough to go between the worm teeth. Then put a jubilee clip across the legs to stop them pulling apart.
by midgie
Fri Feb 28, 2020 10:13 pm
Forum: Tech
Topic: NEB clutch primary cover
Replies: 7
Views: 1061
Flag: England

Re: NEB clutch primary cover

71-2026 is the correct type to use, as for the std 10 plate clutch. I thought you might have had a b25 or victor item, I have noticed many people use the trailblazer type chaincase, might be worth offering one up just to see. I have fitted neb clutches and have never had a problem with the late case...
by midgie
Fri Feb 28, 2020 2:42 pm
Forum: Tech
Topic: NEB clutch primary cover
Replies: 7
Views: 1061
Flag: England

Re: NEB clutch primary cover

What is the casting number on the primary cover you are using Jean Paul?
by midgie
Fri Feb 21, 2020 9:02 am
Forum: Parts & Bikes wanted
Topic: B25/44 Mainshaft sleeve gear wanted
Replies: 3
Views: 571
Flag: England

Re: B25/44 Mainshaft sleeve gear wanted

I have one, pm me cheers.
by midgie
Wed Jan 22, 2020 8:24 pm
Forum: Tech
Topic: B50 rotor nut.
Replies: 9
Views: 1334
Flag: England

Re: B50 rotor nut.

kommando wrote:
Wed Jan 22, 2020 5:25 pm
The 20 TPI is the pre OIF rotor nut, so either dropped into the wrong box or a supplier assuming they were the same.
No the thread on the crank is 20tpi.
by midgie
Wed Jan 22, 2020 2:36 pm
Forum: Tech
Topic: B50 rotor nut.
Replies: 9
Views: 1334
Flag: England

B50 rotor nut.

Be sure that the thread on the crank is 5/8" x 18 TPI as it says in the parts book, as some I have found are 5/8" x 20 cycle thread, just a heads up before you try to wind on the wrong nut!
by midgie
Fri Oct 04, 2019 12:56 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 7621
Flag: England

Re: bbenxe's B50T flat/street tracker

Typical std b50 rod trick, breaks there every time, you were very lucky not to destroy the cases.
by midgie
Sat Sep 28, 2019 9:39 pm
Forum: Parts & Bikes wanted
Topic: B50 1971 Crank shaft nut 21-2066
Replies: 2
Views: 820
Flag: England

Re: B50 1971 Crank shaft nut 21-2066

The b50 crankshaft nut is the plain type Steve, its possible to put a 5/8" cycle tap through a 5/8" unf nut, this works a treat.
by midgie
Thu Sep 19, 2019 7:45 am
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 3408
Flag: England

Re: B25T Rear Chain Oiler – Cap Off?

A problem I have seen many times, is owners mix up the normal inspection plug and the vented type that has no internal clearance, which then fouls the clutch pushrod adjuster screw.
by midgie
Mon Sep 09, 2019 3:23 pm
Forum: Parts for sale
Topic: nos b50mx engine.
Replies: 3
Views: 2366
Flag: England

nos b50mx engine.

Genuine new old stock b50mx engine with factory labels from late 1971.
by midgie
Fri Aug 30, 2019 7:50 pm
Forum: Parts for sale
Topic: new old stock b50 crankcases
Replies: 2
Views: 2278
Flag: England

new old stock b50 crankcases

Genuine new old stock b50 crankcases for sale, complete with all studs and bearings condition perfect, still has the factory part no. tag. Pm me if interested.
by midgie
Wed Aug 28, 2019 3:54 pm
Forum: Tech
Topic: Rough rear wheel rebuild offset
Replies: 2
Views: 1582
Flag: England

Re: Rough rear wheel rebuild offset

The offset measured across the brake drum to the edge of the rim for a std wm3 rim is 1. 7/8".
by midgie
Wed Aug 28, 2019 3:45 pm
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 3408
Flag: England

Re: B25T Rear Chain Oiler – Cap Off?

None of the 250 or 500cc oil in frame singles ever left the factory with a chain oiler, it was blocked off with a fibre washer and a 1/4" unc x 5/8" setscrew. The bsa badged oif 250cc machines also had qty1 screwed breather plug fitted as std. The b50 of course didn't need it with the breather alrea...
by midgie
Thu Jul 18, 2019 4:25 pm
Forum: Tech
Topic: Spacer plate
Replies: 3
Views: 1269
Flag: England

Re: Spacer plate

B50 stud centre's are approx 80mm.
by midgie
Sun Jun 30, 2019 4:22 pm
Forum: Tech
Topic: 8inch front brake
Replies: 16
Views: 4352
Flag: England

Re: 8inch front brake

Spot on JB.
by midgie
Wed Apr 03, 2019 1:28 pm
Forum: Project bikes
Topic: Hammer of the Gods - B50SS Project
Replies: 151
Views: 40266
Flag: England

Re: Hammer of the Gods - B50SS Project

You need the lobe on the cam facing the gearchange quadrant, the slot will be upright. Dab a bit of paint on the top of the adjuster screw to show you its in the correct position and not 180 degrees out,adjustment should then be no more than 90 degrees either way from the vertical position.
by midgie
Tue Apr 02, 2019 8:05 am
Forum: Project bikes
Topic: 1971 B50T Victor 500 Restoration.
Replies: 67
Views: 17450
Flag: England

Re: 1971 B50T Victor 500 Restoration.

Nice work Gene, looks super.
by midgie
Thu Feb 07, 2019 4:55 pm
Forum: Tech
Topic: Prop stand
Replies: 13
Views: 3154
Flag: England

Re: Prop stand

The oif 250, and early b50ss/t machines had a hook type spring anchor on the prop stand, this changed to the barrel type on the later ones, both had the cross hatch on the foot.
by midgie
Tue Dec 25, 2018 12:41 am
Forum: Parts & Bikes wanted
Topic: horn bracket
Replies: 16
Views: 4632
Flag: England

Re: horn bracket

minetymenace wrote:
Thu Dec 20, 2018 6:26 pm
Early oif B25 Chris, my <12fs is on the left and B50 type gearbox mainshaft and kick start mech..
Yes I agree that's all correct for the b25fs.
by midgie
Tue Dec 25, 2018 12:41 am
Forum: Parts & Bikes wanted
Topic: horn bracket
Replies: 16
Views: 4632
Flag: England

Re: horn bracket

minetymenace wrote:
Thu Dec 20, 2018 6:26 pm
Early oif B25 Chris, my <12fs is on the left and B50 type gearbox mainshaft and kick start mech..
Yes I agree that's all correct for the b25fs.
by midgie
Thu Dec 20, 2018 5:20 pm
Forum: Parts & Bikes wanted
Topic: horn bracket
Replies: 16
Views: 4632
Flag: England

Re: horn bracket

Bracket shown in shot is the oif b25 item, mounted on the r/h side. Hence not for the b50.
by midgie
Tue Nov 06, 2018 9:06 am
Forum: Tech
Topic: cam followers
Replies: 55
Views: 12932
Flag: England

Re: cam followers

The later thick foot followers were fitted as std on the oif 250 singles. But I have found on a few of the very early examples the earlier thin foot type had been fitted from the factory. The b50 always used the thick foot type (71-2513) from the start.
by midgie
Tue Oct 09, 2018 3:20 pm
Forum: Tech
Topic: How thin can a liner be ?
Replies: 5
Views: 1725
Flag: England

Re: How thin can a liner be ?

I have used 88mm bore on the standard liner for many years, never had a problem.