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Re: Barn Find Beeza [Re: Psychopasta] #785024 09/22/19 12:50 am
Joined: Aug 2001
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gavin eisler Offline
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Weird barrel nuts for a 70, would have been bihex originally, the flange looks thick enough, measure the studs OD are they 3/8th".?


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
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Re: Barn Find Beeza [Re: Psychopasta] #785027 09/22/19 1:09 am
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Psychopasta Offline OP
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The end float is clearly noticeable by hand, and I can hear a clunk as I push and pull the end the the crank... eek

Re: Barn Find Beeza [Re: Psychopasta] #785028 09/22/19 1:17 am
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Psychopasta Offline OP
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So I got the top end off. Loosened the rockers:
[Linked Image from i.imgur.com]
and knocked out the cams and took off the rockers carefully labelling everything. Then it was time fro the Whitworth and Hammer:
[Linked Image from i.imgur.com]
Got all the bolts off, including the deeply recessed one. The top end came off with just a little encouragement froma block of wood in the ports and a hammer
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Here's the lower part:
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Copper washer looks OK
[Linked Image from i.imgur.com]

Re: Barn Find Beeza [Re: Psychopasta] #785029 09/22/19 1:22 am
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Psychopasta Offline OP
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And here she is at the end of play today:
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Re: Barn Find Beeza [Re: Psychopasta] #785040 09/22/19 3:27 am
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NickL Offline
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Dogs and gears look pretty good, make sure the camplate tracks for the selectors and the index plunger are not worn too badly.
When you shim the layshaft do it from the drive side. (the factory never did it!) As Gavin says, a couple of thou endfloat is all you want.
All looks pretty good so far. If the rotor is out for any length of time a keeper is needed. (just use the stator)
If you use a drop of loctite on the timing side crank locknut, you can dispense with the tab washer.
As you've probably found out, it's easier to remove the oil pump and worm drive as one. You don't have to do that if you use 3 bolts
rather than the original studs for the pump.

That's a 5/16 top end Gavin, probably cases too, that's why the hex nuts.

Last edited by NickL; 09/22/19 3:31 am.
Re: Barn Find Beeza [Re: Psychopasta] #785058 09/22/19 9:33 am
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gavin eisler Offline
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The cases have the BSA embossed number pad, weird to find 5/16" barrel studs.I thought the embossed number pads all came with 3/8" barrel studs.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: Barn Find Beeza [Re: Psychopasta] #785073 09/22/19 1:41 pm
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MarcB Offline
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Head also appears to have small studs. Maybe a set of factory replacement cases?

Re: Barn Find Beeza [Re: Psychopasta] #785076 09/22/19 3:05 pm
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kommando Offline
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All the unstamped factory replacement cases built later I have seen come with the updated threads etc, ie cycle becomes UNF/UNC, the exception is some B25 cases made in 71 which had the narrow rear mount for 70 and before. There should be some small stamps on the crankcases showing a date, this started from 69 onwards or maybe earlier.

Re: Barn Find Beeza [Re: Psychopasta] #785115 09/22/19 9:36 pm
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Psychopasta Offline OP
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OK, so now for the money shots. In as much as, how much money is this gonna cost?

I got the cylinder barrel off after using some heat to soften the gasket, which was clamping tight. Here are the pistons:

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]


and the bowel of the beast
[Linked Image from i.imgur.com]

Re: Barn Find Beeza [Re: Psychopasta] #785117 09/22/19 9:39 pm
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Psychopasta Offline OP
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And the cylinders...
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Re: Barn Find Beeza [Re: MarcB] #785122 09/22/19 10:13 pm
Joined: Jan 2014
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NickL Offline
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Originally Posted by MarcB
Head also appears to have small studs. Maybe a set of factory replacement cases?


No, the rear two are 3/8 as well.


That looks like a good set of barrels, the bores are evenly spaced, a lot of them were well over to one side.
Pistons look good, measure them up and check the ring gaps and bores, may not need any new gear there
just a hone and done.
Spend a while filing a 45 deg lead on the bores at the base, it makes assembly much easier.

Re: Barn Find Beeza [Re: Psychopasta] #785130 09/22/19 11:20 pm
Joined: Feb 2008
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Tridentman Online Content
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Yes--looks pretty good.
Suggestion: put some rag or some pipe insulation around the con rods to stop them banging against the crankcase.
Knocks and nicks start fatigue failures.
Sorry Nick--not referring to you! (Brit humor).

Re: Barn Find Beeza [Re: Psychopasta] #785135 09/22/19 11:47 pm
Joined: Nov 2017
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David Kavanagh Offline
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Did I spot a crack in #2 cylinder wall? I saw it in 2 pictures in a row, but later ones were blurry in that area, so I couldn't be sure.

Attached Files Screen Shot 2019-09-22 at 7.46.11 PM.jpg

'68 BSA Spitfire MkIV (w/ '67 numbers)
'81 Yamaha XJ550 Seca
'90 Yamaha FZR1000 EXUP
Re: Barn Find Beeza [Re: Psychopasta] #785144 09/23/19 12:57 am
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Psychopasta Offline OP
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Hi David,

It does look like a crack, but it's just a scratch in the enamel. Looks fearsome:
[Linked Image from i.imgur.com]
but a little rubbing with wire wool:
[Linked Image from i.imgur.com]

Re: Barn Find Beeza [Re: Psychopasta] #785145 09/23/19 1:00 am
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Psychopasta Offline OP
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Well, end of phase 1 today: engine is out of the frame:

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Now I have removed all the case connecting bolts, but it looks to have been stuck together with loads of sealant, and it has resisted moderate attempts to split the cases. Before I get medieval on it, any advice for case splitting?

Re: Barn Find Beeza [Re: Psychopasta] #785172 09/23/19 6:38 am
Joined: May 2013
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Allan Gill Offline
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Soak the cases in brake
fluid
cleaner around the sealant. It will soften it right up in a day.

Last edited by Allan Gill; 09/24/19 6:21 am.

beerchug
Re: Barn Find Beeza [Re: Psychopasta] #785187 09/23/19 12:57 pm
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markoz Offline
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Its very clean inside, may not have done a lot of work before being layed up.
Nice going, enjoy.

Re: Barn Find Beeza [Re: Psychopasta] #785189 09/23/19 1:15 pm
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Adam M. Offline
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Great looking pistons and barrels, but lots of oil in one combustion chamber.
Check your valves / guides clearances.

Re: Barn Find Beeza [Re: Psychopasta] #785190 09/23/19 1:16 pm
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Adam M. Offline
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Great looking pistons and barrels, but lots of oil in one combustion chamber.
Check your valves / guides clearances.

Re: Barn Find Beeza [Re: Psychopasta] #785194 09/23/19 1:55 pm
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Psychopasta Offline OP
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Thanks Allan, I would never have thought of using brake fluid.

Re: Barn Find Beeza [Re: Psychopasta] #785247 09/23/19 8:59 pm
Joined: Jan 2014
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NickL Offline
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You have the old type oil pressure relief valve fitted , it may be worth replacing that with the late one especially if
you have an srm pump.
Should be running in a day or two eh?

Re: Barn Find Beeza [Re: Psychopasta] #785295 09/24/19 6:23 am
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Allan Gill Offline
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Originally Posted by Psychopasta
Thanks Allan, I would never have thought of using brake fluid.
. Sorry Psycho, had a typo. It was brake cleaner I was thinking of, brake fluid might work as it will remove paint but I did mean cleaner


beerchug
Re: Barn Find Beeza [Re: Psychopasta] #785306 09/24/19 8:48 am
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Psychopasta Offline OP
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OK, well I'll find out soon what brake fluid does as it put it on last night beerchug

I must admit, I was wondering how on earth you found out to use brake fluid. Brake cleaner I can get, good solvent.

Re: Barn Find Beeza [Re: Psychopasta] #785310 09/24/19 9:18 am
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gavin eisler Offline
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Petrol works as well, especially on Silicon RTV type gasket goo.
petrol makes RTV expand, thats why it isnt used on carbs.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: Barn Find Beeza [Re: Psychopasta] #785581 09/27/19 3:05 am
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Psychopasta Offline OP
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Well, it turns out that brake fluid works pretty well too. Who knew? thumbsup

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Page 5 of 7 1 2 3 4 5 6 7

Moderated by  Allan Gill, Jon W. Whitley 

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