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Definitely getting off topic, but enjoyable all the same! By way of an update, the smoke stops when I've been riding for a bit, but tends to be back when restarting the engine - until another few miles are ridden. A further problem has emerged, dull heavy knocking when under moderate load when the m...

Thanks all, mega helpful replies. A few points. The motor is a 1968 B40G, military model, so side points and later oil system/pump are standard, but thanks for the interesting post on the issue with the converted engine Tom. Re Jeff's post on the round BSA/Tri filters. Tried that, but the clearance ...

I should add that it smoked badly from revolution number 1 on start up - before the oil had time to get around the motor. Oil circulation started up OK after a short while, but no difference to smoke levels.

Hi all, I have a B40 motor in a 1971 T25T frame. I’ve posted on this in the past and thanks to everyone who replied on some tech issues when building this combination of bike. One problem remains. How to join the carb to the air filter. The carb on the B40 sits quite far left of centre, so two acute...

Thanks to all for your posts on this. It's appreciated.

Is there a part available that allows oil to be fed to the motor from the rear of the frame on an OIF? Thinking of some sort of 'gland bolt' (wrong word I know) to which an oil feed banjo and pipe can be fitted.

?????

Greetings to all.

Craig.

Is this still active and working properly? All attempts to add my bike were rejected.
Plus the location map throws up a Google error dated 2011.

Craig.

Do you have a photo of the alloy fuel tank?
How much are you looking for?

Craig.

Thanks. I think I'll be trying that solution. Now to find some tube ...

Hi, does anyone have some of the shouldered electrics box bolts they can pass over for a fee? Part number 21-2128 I need three. No one here in the UK seems to be selling these now.

Thanks!

Thanks. I'll try some of this. Maybe I'm worrying too much - oil pressure build up on the roller big ends is low, so reducing the chance of the seal blowing out.

Hi, I'm refurbishing a WD B40 lump. This has the crank end feed oil seal pushed in with no retaining circlip in contrast with later motors that have this circlip. However, the new oil seal is a very easy push fit. I've tried fitting alterative seals from a different supplier, but the same issue aris...

Thanks for the replies re this. All concur with what I've discovered so far and I appreciate the input. Rear engine mounts need spacers as mentioned, I'm having these made at the mo. Plus new rear engine plates, as the much wider rear engine mount casting on the OIF motors has the bolt hole placed f...

That's great - thanks!

Looks to be set up about the same as mine.

Hi all, I'm planning to fit an ex war department B40 motor into an OIF B25/T25T chassis. I also plan to use a B44 motor in the same chassis at a later stage. Any tips, warnings or things to take into account when doing this? I'm already aware of the need for rear engine mount spacing, as the pre OIF...

Hi all, Can anyone advise on the correct depth for the sprocket side rear wheel bearing into a conical hub. My bike is an OIF chassis B25 type from 1971, but the T25T 'badge engineered' version. I'm concerned about sprocket alignment. The wheel I have has had new bearings, but these were fitted to a...