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 ....

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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.
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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.
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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.
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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....

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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.
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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.
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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.
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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.
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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.
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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.
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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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Re: 1971 B50T Victor 500 Restoration.

Postby lathejack » Wed May 23, 2018 9:20 pm

I haven't felt too good over the previous two or three months, with no energy or inclination for bike and workshop activities. But I felt better over the last couple of weeks, so ordered a few new bits and bobs for the B50 and did a bit of machining.

I bought a couple of 8 inch conical front wheels from the Autojumble, both needing new rims. One of the drums needed the brake surface skimming to remove rust and pitting, about a 12 thou deep cut was required to clean it up enough for use.
The whole drum was bead blasted before mounting on the lathe.
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The drum after machining.
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Rusty and pitted before skimming.
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The grotty brake plate assembly is yet to be worked on.
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I knocked up a simple wheel trueing stand, and despite never having built up a wheel before, after a few hours of assembly and fiddling I had a nice new shiny and true wheel. What made this possible was the build video by Devon Rim Company, which are specific to the wheel being built. Plus I had another front wheel as a reference.
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Last edited by lathejack on Thu May 24, 2018 1:47 pm, edited 1 time in total.

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Re: 1971 B50T Victor 500 Restoration.

Postby lathejack » Wed May 23, 2018 9:48 pm

The bead blasted drum was painted inside and out, etch primer first, silver paint then clear laquer, all from spray cans. After first doing a small test piece, the painted drum was popped into the oven and baked at 100 Deg C for 30-40 minutes. A tough scratch resistent finish was the result, which I didn't really expect with rattle can paint.
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The finished wheel complete with new Ensign Universal tyre. I chose 19 inch Stainless rims and spokes from Devon Rims, and these are the Valtru Stainless rims which are not highly polished to a chrome like finish, but cost a lot less yet are still more than good enough for the price.
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Re: 1971 B50T Victor 500 Restoration.

Postby JB » Fri May 25, 2018 12:59 pm

Liking what you've done there with the front wheel, I too went for the Valtru rims and with the stainless spokes you've got a something that not only looks good but it should also stay that way :lol: Really good to see the B50T progressing and as Grace Jones once said 'keep it up' :thumb

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Re: 1971 B50T Victor 500 Restoration.

Postby koncretekid » Fri May 25, 2018 2:47 pm

Well done, and I hope you continue feeling well enough to keep up the good work! I've been thru a fair amount of health issues in the past, and I always find rebuilding my creations to be extremely therapeutic and encouraging, especially upon finishing any project.

Tom
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Re: 1971 B50T Victor 500 Restoration.

Postby ShinyShoes » Mon Jul 02, 2018 11:56 am

Really like the fact that you are almost self-sufficient when it comes to machining and manufacturing your own kit, etc. I think you're making a terrific job of the restoration. If my B50SS comes out anywhere near as good I'll be a very happy bunny!

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Re: 1971 B50T Victor 500 Restoration.

Postby lathejack » Sat Jul 07, 2018 10:33 am

Thanks JB, Tom and ShinyShoes for the comments. I was hoping to get the bike finished this year, but that might not be possible after all.

The brake assembly was in a very rough state, but nothing was seized up.
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It was improved somewhat after bead blasting, spraying and baking in the oven.
New shoes and springs were added. The springs are Morris Minor items at a quarter of the price of those listed for the BSA brake. The Morris springs are a little shorter, but they still fit and work fine.
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I have two of these wheels to rebuild, so couldn't resist fitting this one to my 250 Victor to try it out.
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So with the shadow of how bad these brakes can be hanging over me for decades, I finaly try one out for the first time.
After the first several applications of the brake the screeching, slight juddering and grabbing fades away to reveal a fabulous brake with superb stopping power. Ok, it's only stopping a 300 lb bike from moderate speed rather than a 500 lb triple, but I am more than impressed, and with the air scoop it looks good too. So that's one more decaying BSA relic that's been saved and reborn.
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This is the dreadful state of the rim the wheel came with, totally rotted through.
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