1971 B50T Victor 500 Restoration.

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beat
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Re: 1971 B50T Victor 500 Restoration.

Postby beat » Sun Apr 16, 2017 7:07 pm

lathejack wrote: I may as well spend a few quid and fit a Carrillo.


....and clean the sludge trap and let us know the mud in there ....

beat :uhu

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Re: 1971 B50T Victor 500 Restoration.

Postby midgie » Sun Apr 16, 2017 9:27 pm

the saying 'dirty washing' and public spring to mind!

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Re: 1971 B50T Victor 500 Restoration.

Postby lathejack » Mon May 01, 2017 10:54 am

Slowly making some progress, I made up some tooling for splitting the crank.

First a hefty jig for safely holding the crank when removing and replacing the crankpin nuts. It might look a bit over the top, but the crank is in excellent unmarked condition and I want to ensure it stays that way.
image.jpg


I also made a Bolster for pressing out the pin, several pumps on my 20 ton press and bang, it's all over and I have a crank in two parts.
image.jpg


I only had time to do a quick check of the measurements of the big end assembly. It appears to fall outside allowable limits, with big end play of 2-3 thou.
Sludge trap plug removal to follow soon.
image.jpg

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Re: 1971 B50T Victor 500 Restoration.

Postby beat » Mon May 01, 2017 7:23 pm

wonder how you get it together....

beat <201

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Re: 1971 B50T Victor 500 Restoration.

Postby lathejack » Mon Sep 18, 2017 10:25 pm

Progress has been crawling along over the past few months, the motor is still in pieces, but I have been doing bits and bobs here and there to the rest of the bike.

I did remove the crank sludge trap plug, the trap had about a 1/4 inch thickness of solid muck in the bottom, so not as bad as some I have seen. It still awaits a thorough wash and rinse with a solvent to remove all remaining traces of filth in there.
image.jpg


The bike was still fitted with original rear shocks, so these were stripped, cleaned up and checked. The damping was still fine, with no corrosion to the damper rod or springs, which is all quite good considering their age.
image.jpg


The pair of shocks on the right are some new ones I bought last year, but I preferred to restore and refit the originals on the left.
image.jpg


Once the swinging arm needle roller bearings and hardened inner sleeves were thoroughly washed they were found to be in perfect condition, not a trace of wear or corrosion at all.
After a final rinse and regrease the refitted swinging arm operates as smooth as silk, without a hint of play.
image.jpg

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Re: 1971 B50T Victor 500 Restoration.

Postby lathejack » Mon Sep 18, 2017 11:08 pm

The edge of the chain tensioner cam plates tend to sit on top of the quite lumpy frame welds in some positions, instead of flat onto the support plates.
So just where required the welds were dressed down a little to allow the cam plates to sit flat, as they really ought to.
My 71 B25 Victor has much neater welding in this area, and the cam plates, which are actually a little larger than those on the B50, already sit nice and flat.
image.jpg



About 90% of the frame and swinging arm original paint is intact, so at the moment I have just touched it up and blended it in where required.
On one hand I feel like this is just cutting corners, but on the other, if most of it is quite good I do like to preserve as much of the original factory finish as possible, even if it is somewhat scratched, chipped and faded in places. I like this direct link with the past, the BSA works and the history it brings with it, or is that really all just in my head?

The front end of the bike has not been touched yet, once the back wheel is properly fitted the bike will be spun round on the bike lift.
The replacement rear tyre is a Pirrelli MT43.
image.jpg

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Re: 1971 B50T Victor 500 Restoration.

Postby minetymenace » Tue Sep 19, 2017 8:02 am

I like a sympathetic restoration, far too many over restored machines out there... <200
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Re: 1971 B50T Victor 500 Restoration.

Postby kommando » Tue Sep 19, 2017 9:20 am

You can get oversize rollers to get rid of the 2 to 3 thou clearance on the earlier B44 big end with 1/4" rollers, I used 1.5 thou oversize rollers to fix a 3 thou clearance. All depends on the condition of the inner and outer rings, B50's with the needle rollers may not be fixable that way.


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