Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - Bess

Pages: 1 ... 16 17 [18] 19 20 21
Twins / Re: Engine tear down
« on: 22 March, 2017, 09:48:05 »
     My criteria for a rebuild is obvious engine noise related to the crank bearings, main and big ends. If so, I fit a pressure gauge and if am happy with the oil pressure when the oil is warm I continue riding. The engines I've stripped have had about 50% of the sludge trap filled with muck which did not impede the oil flow.

From memory the oil pressure switch operates above 5 psi and the oil pressure relief valve is set at 50 psi.

Best wishes....

Twins / Re: A65 - Front wheel spindle
« on: 20 March, 2017, 12:15:31 »
Hi JulianS,
                 Thanks for the reply, interesting findings, lucky I haven't got the issues like the chap in Canada but reading through and looking at the photos I had an epiphany.

I measured the metal between the tube and the spindle clamp. The counterbored slider has a length 0.780" the other has 0.650", the depth of thread is longer for the clamp bolts I expect.

I will be using the sliders I have using allen screws for the high tensile strength, unless I can source  new (that's doubtful). The other issue is that the gap between the clamp and slider is slightly bigger on the non counterbored sliders. Cannot determine the difference with the clamps.

Also now need counterbored clamps to fit the correct sliders on the A50.

I have sourced the correct spindle so the original problem should be solved after I fit it.

Thanks for your input, learnt a little more for the autojumbles.. :)

Twins / Re: A65 - Front wheel spindle
« on: 19 March, 2017, 17:46:36 »
Okay, that changes things. The A50 has the counterbores the 2 A65's do not.

All three sets of forks have been rebuilt from scratch with new items corresponding to all part numbers from years 1969 to 1970 using the fork sliders with and without counterbores (slider part numbers 97-3641 & 97-3645).

My guess is that the counterbores are added to the fork sliders because they have been built as per the diagram attached. Maybe the fork sliders are the same for other models but with different internals.

I would value your opinion...

Twins / Re: 1971 A65L plain main bush
« on: 19 March, 2017, 16:44:16 »
Hi Caulky,
                If it is within specification and undamaged leave it. The roller bearing alignment should be fine unless the crank journal on the drive side is under tolerance, sleeving or the use of loctite should solve that. 

Clean the sludge trap, reassemble and rotate the crankshaft, if it does not rotate freely you have an issue that will need investigation.

Best wishes.....

Twins / Re: A65 - Front wheel spindle
« on: 19 March, 2017, 15:49:34 »
Thanks JulianS,
                         My arrangement is the same as yours, with the lug not fully engaged and a gap.

Image j02 show the gap, image r01 on a A50 which I think is the longer spindle and image t01 I welded additional and turned down to suit.

   It's very likely I will buy and fit the 7 1/2" shaft, however my investigations are throwing up part numbers 37-2057 and 37-3582 are identical. Do you know if this is true?

Best wishes

Twins / Re: Single seat on a A65 Thunderbolt?
« on: 19 March, 2017, 10:58:23 »
Hi Andy,
              Your welcome.

I wanted a short seat, purchased an old A65 seat from ebay. Cut about 5-6 inches from the middle and welded the ends back together with two bolts underneath to link up with the original lugs on the frame.

Twins / A65 - Front wheel spindle
« on: 19 March, 2017, 10:48:28 »
     Does anyone know the differences between the following spindles:

* 1968 part number 37-2057
* 1969-1970 part number 37-1641

I have put together forks, brake etc as per the 1968 TLS but the lug on the fork that fits into the TLS plate only enters partway. My thinking is that changing the spindle is the best option but I don't want to spend the cash if I'm barking up the wrong tree.

Best wishes...

Twins / Re: Differences between A65 engines?
« on: 18 March, 2017, 22:24:06 »
    My recollection is that the 1965 head rear bolts are 5/16 not 3/8.  The rocker cover studs are smaller as the head steady is connected to the head not the rocker cover.

Singles / Re: RAF WD B40 Rebuild
« on: 18 March, 2017, 21:57:24 »
Wow, looks good.

Who cleans the surroundings?

Singles / Re: C15 oil leaks!
« on: 18 March, 2017, 21:56:07 »
Hi RedsC15,
                    I haven't had a C15 for awhile and can't remember the tolerances between the casings.

I like using GORE gaskets, and try to use them for every application, they never let me down.

However I tend to ensure any casing mating surfaces specified without gaskets are flat by using a surface table or very lightly removing any high spots with a large smooth file with shed loads of chalk rubbed in the teeth. I fit them together and ensure any rotating shafts, gears etc are free with the specified end float. I Use a DTI or plastigage, then make the decision to fit the necessary spacers to get the desired tolerances. Then I use Hylomar Blue, remembering there is every possibility, if I apply too much that some might peel off inside the engine and interfere with oilways.

Best wishes.........hope this makes sense, I watched the Rugby earlier and had a few ciders to drown my sorrows....

Singles / Re: C15 oil leaks!
« on: 17 March, 2017, 17:57:10 »
Hi RedcC15,
                    Having worked in engineering and having problems with gaskets over the years I now cut my own using GOREŽ GR Sheet Gasketing. Where gaskets are not specified and end float or other problems occur I use Hylomar Blue or Wellseal.

These products have served me well and when used as per the instructions I never had a problems.

Best wishes.

Twins / Re: BSA A10 Super Rocket rewire
« on: 14 March, 2017, 18:57:23 »
Hi Shill,
Connect number 2 to number 5. Number 2 supplies the dip switch onto headlight, number 5 tail light and speedo so using 5 will not be a problem.

Here's a neg earth diagram if you need it (there's 2 but they are both the same).

Best wishes...

Singles / Re: Paint Colour and paint codes for 1949 B31
« on: 13 March, 2017, 10:06:07 »
    I found the following:

From 1948, B31 had an option introduced with tank panels and rim centres in Brunswick green lined gold. Only change in 1949 was a chrome plated rear brake rod introduced.

Best wishes...

Twins / Re: Single seat on a A65 Thunderbolt?
« on: 12 March, 2017, 19:26:17 »

Twins / Re: Single seat on a A65 Thunderbolt?
« on: 12 March, 2017, 09:59:17 »
    Does anyone know where I can purchase a single seat as shown?


Pages: 1 ... 16 17 [18] 19 20 21