Last june I visited the very enjoyable Army motorcylcle rally.
A great weekend as always, and the Triumph performed quite good.
On saturday the sparkplug came out of its place and after a closer inspection (at home) I discovered a crack in the cilinderhead.
The reason why there was no collour on the plug; it was not thight in its place so couldn't transfer its heat to the head
and the plug was overheated.
The clutch appeared to be a bit digital occasionally, so inspection necessary with the season (june) just started.
The idea was to dismantle the clutch en clean it out, but with the primary chaincase cover removed I discovered that more work had to be done.
A more than acceptable amount of clearance was felt on the mainshaft so the gearbox had to be opened for inspection.
My first impession was that the main ballbearing had to be replaced, but the bearing was in good order.
The brassbearing of the mainshaft high gear wheel was missing, this caused the clearance on the shaft.
A closer inspection leaned that also a teeth was missing from the layshaft wheel which is driven from the high gear wheel.
The only explanation I can think of is that parts of the brassbearing caused this damage.
The brass bearing is easy to replace but the damaged wheel is not.
All the other parts were still extremly good order after 69 years, like they were manufactured yesterday.The second discovery was that my bike still had it's original wide ratio gearbox.
I have reason to believe that the 3SW and the 5SW were fitted with the wide ratiobox, the 5 SW with different engine sprocket of course.
Wide ratioboxes are marked WR on the gearbox shell.
Studying the partslist learned that the wideratio box has two set of wheels that differs from the standart box and the are
replacable to convert to the standart box or visaversa.
The wide ratio box provides a very short first and second gear, good for off road use.
If your box is not marked but you think you have wide ratio internals the only way to find out is to open the box, two wheels in my box on
the layshaft are marked WR.
The replacement wheel I have got is not marked so there is only way to be sure is counting.
Wide ratio Standart ratio Mainshaft 27 18 23 15 25 19 23 15 Layshaft 17 26 21 29 19 25 21 29 The 15 theeth is integral with the shaft
Neutral First gear Second Third Fourth
