B65 Mongrel

Just some fun to show. Links, pics or movies.

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SteveS
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B65 Mongrel

Post by SteveS » Thu Sep 03, 2020 8:12 pm

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For various reasons I've had to temporarily abandon my other project so decided to proceed with another idea using various parts I've accumulated over the years. I've put this in 'Off topic' as it's got a twin engine
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bsa b50 b 50 ss frame.jpg
B50 SS Frame
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A65 motor.jpg
A65 Motor
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Showa Forks.jpg
Showa Forks off a H*nda
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Yamaha Monoshock rear suspension.jpg
Y*maha Monoshock Rear Suspension
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Wheels.jpg
Wheels, disc front, std rear
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I'm still busy sourcing a few more parts to flesh out my ideas. When that's done I can look at how to put it all together. An A65 in a B50/B25 frame has been done before so shouldn't be too difficult. The monoshock suspension seems to tie in dimensionally with the B50 frame but we'll have to see if it works or not. This is going to be a long term project, no hurry, I will be completing as and when time and funds permit.
Steve Sewell

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Re: B65 Mongrel

Post by beat » Thu Sep 03, 2020 8:42 pm

:lol: :ok <200 :thumb :mrgreen:

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Re: B65 Mongrel

Post by minetymenace » Thu Sep 03, 2020 8:59 pm

:cool: very :cool:, but sell me your frame and buy another with the dosh.....
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Re: B65 Mongrel

Post by malcward » Fri Sep 04, 2020 8:37 am

Interesting mod to the front of the engine :grin:
Cheers Malc

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Re: B65 Mongrel

Post by SteveS » Fri Sep 04, 2020 1:20 pm

Gerry, I've got a spare B50T frame (damaged) if you're interested.

Malc, yes interesting mod. Looks like the PO had trouble removing the front engine bolt so took a BFH to it :shock:
Steve Sewell

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Re: B65 Mongrel

Post by SteveS » Sat Sep 12, 2020 8:24 am

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Got both the wheels blasted prior to powder coating. This identified a problem with rear wheel :roll:
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Rear wheel blasted exposing damaged sprocket mounts.JPG
Rear wheel, damage to sprocket mounts
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Milled out the damage and then welded by the local expert. Also repaired a crack in the bearing housing
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Welding completed.JPG
Welding to sprocket mounts and bearing housing
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Local powder coater finished the wheels for me. Unfortunately we had a problem with outgassing which has spoilt the finish :cry: I believe this is caused by the casting being porous. The trapped gas in the metal is forced out when the metal is heated forming little craters on the surface. I'm pretty sure it could be overcome by pre-heating the wheels for 30 minutes or so (prior to applying the powder) to purge the trapped gases.
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Outgassing.JPG
Outgassing, has formed small craters on surface of coating
Feeling a little pi**ed off at the moment. <218
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Steve Sewell

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Re: B65 Mongrel

Post by SteveS » Sat Sep 12, 2020 3:13 pm

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Some better news, the engine arrived from Michigan US via Barrow-in-Furness :grin: Sent over in a container.
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A65 Crated Motor.JPG
A65 motor
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At some point I will need to strip the motor so I can get the front engine mount fixed. I've got a good set of A65 crankcases which I could use as a donor but I will try and see if I can get hold of a damaged set rather than sacrifice a good set
Steve Sewell

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Re: B65 Mongrel

Post by SteveS » Sun Sep 20, 2020 2:51 pm

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Afternoon all
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Found another local powder coating company that have done a much better job of finishing the wheels :grin:
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Wheels shod with new tyres.JPG
Wheels fitted with Michelin Sirac tyres
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I wasn't sure about the original source of the wheels. Thought they could be Lester, Cambray, Morris. Thanks to Paul (Beesa71) for confirming they are CMA wheels.
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CMA were based in Suffolk and produced 'Mag' wheels for various bikes in the late 70's and 80's. Disc brake wheels were a complete casting. If you wanted a standard rear hub you gave them your existing hub and they shrunk fit into the casting. On my rear wheel you can still see the spoke holes on the BSA conical hub. The story goes that John Cerhan (the proprietor) was killed by one of the wheels he was working on coming off his lathe :shock:
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Re: B65 Mongrel

Post by Malcolms Lad » Sun Sep 20, 2020 4:31 pm

Love the idea behind this Steve, Look forward to seeing this one!
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Re: B65 Mongrel

Post by B44Claus » Tue Sep 22, 2020 6:21 pm

Exciting project :thumb I look forward to follow your progress!

Brgds,
Claus
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