Author Topic: BSA B50 -500 APG Build  (Read 460891 times)

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Offline Koncretekid

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Re: BSA B50 -500 APG Build
« Reply #810 on: November 29, 2017, 10:21:18 AM »
I am in the midst of conversion to single shock rear suspension which I have posted in the Tech section under Suspension.

Tom
We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!

Offline 55chevr

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Re: BSA B50 -500 APG Build
« Reply #811 on: November 29, 2017, 10:01:56 PM »
The engineering and thought you put into your machine is extraordinary. Always learn something when I look over your bike.
Joe

Offline Old Scrambler

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Re: BSA B50 -500 APG Build
« Reply #812 on: December 03, 2017, 06:23:21 PM »
Tom...maybe a curved bar-brace ahead of the tire and/or inside of the welded 'kinks'............otherwise......looking real good :-)
2011 AMA Record - 250cc M-PG TRIUMPH Tiger Cub - 82.5 mph
2013 AMA Record - 250cc MPS-PG TRIUMPH Tiger Cub - 88.7 mph
2018 AMA Record - 750cc M-CG HONDA CB750 sohc - 136.6 mph
2018 AMA Record - 750cc MPS-CG HONDA CB750 sohc - 143.005 mph
2018 AMA Record - 750cc M-CF HONDA CB750 sohc - 139.85 mph
2018 AMA Record - 750cc MPS-CF HONDA CB750 sohc - 144.2025 mph

Chassis Builder / Tuner: Dave Murre

Offline wobblywalrus

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Re: BSA B50 -500 APG Build
« Reply #813 on: December 03, 2017, 08:12:18 PM »
This is what I did.  The arms were extended 3 inches using butt welds.  1/4 inch thick gusset plates were welded on each side for a total of four plates.  The vacant space in between the arms was boxed for strength.

Offline Koncretekid

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Re: BSA B50 -500 APG Build
« Reply #814 on: December 06, 2017, 06:36:42 AM »
Tom...maybe a curved bar-brace ahead of the tire and/or inside of the welded 'kinks'............otherwise......looking real good :-)
Dennis,
I'll be doing something like that once everything is in place to check clearances.

By the way Dennis, I'm also building a 250 motor to run in the M Class at Loring, Maine.  Of course, if the motor is strong, it will bolt right into my A Class frame!  Photo is attached of the frame without the motor.

This is what I did.  The arms were extended 3 inches using butt welds.  1/4 inch thick gusset plates were welded on each side for a total of four plates.  The vacant space in between the arms was boxed for strength.

Bo,
Ditto the answer I gave to Dennis above.  Making sure the tire clears the spring, and making sure the swingarm clears the frame where I've cut it just behind the foot peg mounts.  Fitting a tube or shaped and boxed in plates inside the swingarm between the spring and the rear wheel would be most efficient.

Tom
We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!

Offline Old Scrambler

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Re: BSA B50 -500 APG Build
« Reply #815 on: December 06, 2017, 09:31:43 PM »
Good work.................I'll be working on my Cub for 2018.............I made one run in 2016 at more than 90-mph but it started missing and slowed with no time for a recovery attempt.
2011 AMA Record - 250cc M-PG TRIUMPH Tiger Cub - 82.5 mph
2013 AMA Record - 250cc MPS-PG TRIUMPH Tiger Cub - 88.7 mph
2018 AMA Record - 750cc M-CG HONDA CB750 sohc - 136.6 mph
2018 AMA Record - 750cc MPS-CG HONDA CB750 sohc - 143.005 mph
2018 AMA Record - 750cc M-CF HONDA CB750 sohc - 139.85 mph
2018 AMA Record - 750cc MPS-CF HONDA CB750 sohc - 144.2025 mph

Chassis Builder / Tuner: Dave Murre

Offline wobblywalrus

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Re: BSA B50 -500 APG Build
« Reply #816 on: July 05, 2018, 12:52:47 AM »
Tom, you had a problem with the brake pucks not retracting, as I recall.  The same happened to me.  The solution was to take the caliper apart and to remove the puck seals.  Then, all corrosion in the seal grooves was scraped out using a dental pick.  Next, the groove surfaces were polished using a Dremel tool.  Then, the caliper was put back together.

Corrosion behind the seals was pushing them up against the puck and they would not allow the puck to retract.  Removing the corrosion did the trick.