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67 BSA Victor - just got my latest Project

Re: 67 BSA Victor - just got my latest Project

Postby Mark » Sat Jul 14, 2012 9:52 am

daveh:
For someone not familiar with these little engines, you sure asked the right questions! :)
FWIW, I'm not too familiar either, I'm learning as I go.

The engine was originally roller on the drive side , Ball on the timing.
I just put a brass caged roller bearing in place of the ball bearing.

Crank endplay will be controlled by shims only. .003 play dry will give me plenty of freedom
(after I assemble the cases with loctite 518 flange seal) without being too much.
I set the endfloat to its minimum of 3 thou to of course reduce the effect of a crank moving from side to side,
in 3 thou it can't pickup much speed, and it's inertia that accounts for banging the bearings into submission.

I used a new Alpha B26 crankpin (Big end bearing). It has 12 full rollers (unlike the Stock 24 smaller/split rollers)
and an alloy cage.
Rod to flywheel clearance is 12 thousandths (.006 per side) which is really determined by the machining of the
flywheels and crank pin, I didn't have any control of that.
From what I have read, there is plenty of clearance to insure proper big end oiling.

Mark
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Re: 67 BSA Victor - just got my latest Project

Postby daveh » Sun Jul 15, 2012 6:42 am

Mark wrote:daveh:
For someone not familiar with these little engines, you sure asked the right questions! :)
FWIW, I'm not too familiar either, I'm learning as I go.

The engine was originally roller on the drive side , Ball on the timing.
I just put a brass caged roller bearing in place of the ball bearing.

Crank endplay will be controlled by shims only. .003 play dry will give me plenty of freedom
(after I assemble the cases with loctite 518 flange seal) without being too much.
I set the endfloat to its minimum of 3 thou to of course reduce the effect of a crank moving from side to side,
in 3 thou it can't pickup much speed, and it's inertia that accounts for banging the bearings into submission.

I used a new Alpha B26 crankpin (Big end bearing). It has 12 full rollers (unlike the Stock 24 smaller/split rollers)
and an alloy cage.
Rod to flywheel clearance is 12 thousandths (.006 per side) which is really determined by the machining of the
flywheels and crank pin, I didn't have any control of that.
From what I have read, there is plenty of clearance to insure proper big end oiling.


I'm familiar with a few other singles, e.g Ducati and Matchless. I have always thought those BSA singles were neat bikes that had potential and would make a good project. From the way you are building it, it will be given a good chance to be a reliable and fun bike to ride.

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Re: 67 BSA Victor - just got my latest Project

Postby gtsun » Sun Jul 15, 2012 11:39 am

They are a blast, like I've said here a gazzilion times I love my 441 Shooting Star. Your building a great motor probobly stronger then stock, I saw one at a local Brit bike shop in Orange CA a while ago that someone had made into an amazing Cafe bike. Far from typical it had top quality everything. High end Italion controls/clipons/rear sets. Custom seat and some real high tech electronics etc. And a bright bright red! Whoever did it was dreaming of a 450 Desmo Duck single with BSA badges.. It was a early round cylinder motor so I hope they did good with the bottom end, I've heard they like to explode if worked to hard.
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Re: 67 BSA Victor - just got my latest Project

Postby Mark » Sun Sep 16, 2012 9:23 pm

I haven't posted on the project lately, I been occupied with life lately so
the bike has been put somewhat on the back burner.

I have made some progress - here's an update:

Crankshaft shimmed and cases bolted up tight:
Image

Back on the makeshift engine stand

Timing side:
Image

Piston in / cylinder on:
Image

Gearbox:
Image

Drive side (NOTE the holes drilled for crankcase breathing):
Image

Carburetor - 32mm. Amal:
Image

The Engine as of today - head bolted on:
Image

Rear Brake / hub:
Image

Image

Frame - only repair needed was welding the kickstand lug back on correctly:

Before:
Image

Image

After - paint, swingarm installed:
Image

I've also got the foot pegs, top motor mount and brake pedal painted, I just didn't take a pic of them.

The rear fended is just mocked up for now. It was stock but I cut it down and rotated it forward about 5 inches.
The plan is to weld up the holes and paint it (eventually).

Mark
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Re: 67 BSA Victor - just got my latest Project

Postby daveh » Mon Sep 17, 2012 2:10 am

Good pics, Mark. The engine is coming along nicely. I see the crankcase vent holes. Will your engine vent through a one-way valve?

What type of paint did you use on the frame?

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Re: 67 BSA Victor - just got my latest Project

Postby Mark » Mon Sep 17, 2012 6:04 pm

daveh wrote:What type of paint did you use on the frame?


good Ol' Rustoleum.

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Re: 67 BSA Victor - just got my latest Project

Postby worntorn » Mon Sep 17, 2012 9:38 pm

Mark, the large timing gear in the photo appears to be a white plastic job, probably made from UHMW, is this correct?
An aftermarket Vincent supplier made mag drive gears out of this stuff for both twins and 500 singles. They were used quite a lot in the 80s 90s, the claim was quieter running. The other claim was that they would be long wearing.

They werent, in fact they let go at very low miles. The white plastic does not stand up well to the heat of the engine. It likes to go "plasticky". The teeth sort of half let go, which creates a shift in timing. That alone can wreck a motor and did in at least one situation. Generally tho, they just lose their teeth, leave you stranded with a crankcase full of shredded plastic, engine teardown required to remove shredded plastic and unblock oil passages.
So if it is one of those white plastic gears, deep six it, if not, carry on, looks great!

Glen

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Re: 67 BSA Victor - just got my latest Project

Postby Mark » Tue Sep 18, 2012 12:04 pm

It's surprising what people pick up on in pics.
Now that I look, it does look white but it is just washed out from the flash.

No plastic gears for me:
Image

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Re: 67 BSA Victor - just got my latest Project

Postby Mark » Tue Sep 18, 2012 12:08 pm

I spent a little time polishing / lightening up the rockers:

Image

Image

Image

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Re: 67 BSA Victor - just got my latest Project

Postby Mark » Thu Jan 10, 2013 3:55 pm

Here are a few more pics just to let you know that there is still some progress being made on my project.
I haven't been doing much on it lately , work, the holidays, surfing the internet have all been taking up a lot of my free time.
It's coming along - slow but sure.

THE ROCKER BOX:
The bore for the decompression lever (valve lifter) was wallered out so I had to devise a bushing for it.
It looks like it is going to work out just fine:
Image

Image

Image

I spent a little more time lightening and polishing the rocker arms:
Image

It is all back together now and bolted onto the engine.

PRIMARY DRIVE:

The clutch got new rollers
Image

New Cush Rubbers
Image

And a new Primary chain
Image

Rotor and Stator installed
Image

Just clutch plates and it's ready to button up.
I'm gonna do that with the engine back in the frame and the cable hooked back up
for the sake of an easy clutch adjustment.

I just received all of the pieces required to rebuild the Ceriani Front End from the steering
head bearings on down. That's the next step in this saga.

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Re: 67 BSA Victor - just got my latest Project

Postby Matt Spencer » Thu Jan 10, 2013 4:30 pm

Looks like she'll be a really nice bike .
The Japanese response to ' styling ' , was to add more .
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Re: 67 BSA Victor - just got my latest Project

Postby daveh » Thu Jan 10, 2013 6:11 pm

More progress - good stuff!

Once you have the front fork done, then wheels and brakes?

Do you have a wiring loom or will you make your own?

Dave

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Re: 67 BSA Victor - just got my latest Project

Postby Dances with Shrapnel » Fri Jan 11, 2013 1:18 pm

Mark,

Well done! I traded a 66 or 67 round barrel with a friend and now sort of regret it as it is a neat bike. Looks like yours is coming together nicely and you have all the good bits.

Thanks for the update.
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Re: 67 BSA Victor - just got my latest Project

Postby acotrel » Fri Jan 11, 2013 1:39 pm

Looks like all it needs is petrol in the tank, and it is a goer !
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Re: 67 BSA Victor - just got my latest Project

Postby GRUP » Sat Jan 12, 2013 7:23 pm

What is that abomination on the stock muffler ? I agree in principle with the purists, but must confess that my brothers and I made many " woods " modifications back in the day. Great to see another old Victor will be back running again. Good Pics.

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