A65T sludge trap

[Jean-Luc]

Hello !


The sludge trap of my 1970 twin had never been opened.
Sludge quantity is very low as you can see.
Indicated mileage is 14000...
Realistic, considering this fact ?

[DAVE BRADY]

Hi,

I would say that it is quite clean for the mileage.  It would be interesting to know what oil it has been run on and if it has a filter fitted.

Dave.

[Jean-Luc]

No filter .
No information about the oils used .

I acquired her 6 months ago.
This bike has been imported from England about 13 years ago. And has been well maintained but very rarely used since then.

[DAVE BRADY]

Hi Jean-Luc,

Are the big ends/shells and bore standard?  If they are then it would support the idea of never having been disturbed.

Dave.

[Jean-Luc]

Not undone them yet.
I hesitate disturbing them as there  is no felt play...

Valves and guides are new.
New +020 pistons too.

But low oil pressure at idle when hot.
Ring is to be replaced because gap with crank is 12/100 mm.

An SRM pump is ordered.

The engine should then last more than me.

[Allan G]

You would be silly not to remove the rods. You also need to remove the rods when cleaning the sludge trap otherwise there's a high chance of getting sludge through the shell and destroying what is left of the shells. If the journal measures on spec then a new set of shells of the same size will be a great thing to do. The SRM shells are very good.

Also if there is any damage to the journal, you want to address it now rather than later.

[Jean-Luc]

You are  right Allan.
I will remove the rods and clean everything for a complete check.

Here is the link to the topic I've created on my french BSA forum.
Sorry, it's in French but there are pictures .

https://bsamicale.forumsactifs.net/t4829-moteur-1970-a65t

[DAVE BRADY]

Good morning Jean-Luc,

The link is very interesting and a translation through Google helped.
I see there are a number of British bike gatherings in France.  Are they open to everybody?  It would be great to attend some if that is possible.

Dave.