I've been doing custom motorcycle work for about six years, and wanted to do something different. Different you want? Different you get. This is a 195x Triumph TRW500 engine. Its a pretty interesting little mill. It is a twin (its a Triumph, could it be anything else), but what makes it more interesting is that its a side valve engine. Essentially, what this means is that rather than the valves being buried in the head (like most modern engines) the valves are in the the cylinders, beside the pistons, hence the moniker 'side valve', or 'flat head' (no valves in the head).
This motor was a war bike, and never sold on the civilian market. The side valve design has essentially been eliminated from modern automotive and motorcycle markets do do its lack of power. This motor puts out about 15 horse power. Contrast that to a modern 500cc motorcycle engine that would put out more than 50 hp.
I mentioned these were never sold on the civilian market, but they are all over the place. After the war years they were sold as surplus still in the crate. A few still exist today:
http://blog.hemmings.com/index.php/2011/08/29/union-jack-in-a-box/
My first task is to acquire tools for this beast. Pre-unit triumph nuts and bolts used the whitworth standard, which is somewhere between standard and metric. Additionally there are a number of extractor tools I will need to get the thing a part. This should be fun, so stay tuned!!!
Whitworth,BSF and BSC (formerly CEI) threads are NOT metric pitch.The pitch is in threads per INCH.
ReplyDeleteBA threads have metric pitch,but a different thrread angle.Any BA threads on a Triumph will be less than 1/4" diameter,and mainly used on carburettors and electricals.
Just for anyone reading this and going the same route.the crank pullers is impossible to find but you can dissasemble the clutch hub and screw the centre onto the crank gear and then use a pullers to remove the gear .
ReplyDeletecan anyone recommend someone who can fully refurbish my solex type 26 Wh2 carburettor within the u.k. please
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