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Hi Does anyone have a diagram or drawing showing the engine gear hole spacing for a T6? Is there a workshop manual or any other book that can help rebuild a Douglas T6? The club doesn't have one.
I making all new timing gears for my engine and be good to have any helpful diagram 
Regards 

The Manual for a T6 etc doesn't help ?

https://www.ebay.com.au/itm/185441168860

Measurements are unlikely, unless on a blueprint.
Does anyone hold such things, that far back ?
Can recall when BSA closed, it was said that 20 tons of documents went into a skip !

Measuring YOUR engine and making to suit should be adequate ?
What you have don't look too bad ??
You wouldn't be the 1st person to hunt down a spare engine to obtain such things ...

That finned alloy sump is a true work of casting genius.  !

Hi Radzziu
Some years ago I made new timing gear pinions for my B29 and got raw pinions (imperial dimensions) from HPC Gears and I think they have pinions that will fit T6 also.
A friend of mine made a new and more stable anchor plate for T6, that is fixed to all four bolts and send me a sketch also showing the distance between centers for timing gears. I made then a drawing for my own T6 and got a sligthly different result for this distance.
I try to attach a photo of the situation in my T6 engine and the sketch and drawing mentioned.
Hope this informations can help you.
Regards hoejmark

(https://www.douglasmotorcycles.net/aa-files/2025/2025.11.12-Cam-spindle-support-plate.jpg)

Above sketch in PDF format - Cam spindle support plate sketch (https://www.douglasmotorcycles.net/aa-files/2025/2025.11.12-Cam-spindle-support-plate.pdf)


(https://www.douglasmotorcycles.net/aa-files/2025/2025.11.12-Anchor-plate-T6.jpg)

Above sketch in PDF format - T6 Anchor plate sketch (https://www.douglasmotorcycles.net/aa-files/2025/2025.11.12-Anchor-plate-T6.pdf)

Hi again
Attachments seem to make problems for me.
I hope Dave can help me making the attachments.
hoejmark

Attachments added.

-Doug, admin