Hi guys, We must have posted at the same time and my post about the out of sequence pic ended up being out of sequence itself. Damn, I was hoping Rob may be able to shed some more light on the issues raised by grumpy. :-)
I am not across the proper technical terms for the various parts but good job so far deciphering my gibberish. Yes that load issue Grumpy mentions between the 2 gears also has me bamboozled. The position of that spring and tension direction is almost counter intuitive. The main gear is fixed in position and pinned in place on the axle so there is only one place it can go. The gearbox casing can move along the axle but only in the direction which increases the load between the 2 gears. That spring must be there to absorb some of that load and provide a bit of flexibility to prevent cracks and breaks etc. Once the casing is in place on the axle by depressing the spring and fitting the lips of those 2 alloy blocks on the axle inside the gearbox casing it has to be right because there is absolutely zero adjustment that I can see. The only way that I can see to adjust that load is by varying the thickness of the washer you see just to the left of the main cog. You can see it if you look closely in pic 4, between the cog and the alloy block on the axle. The protruding bit between the cog and the wash is part of the cog. I guess you could also machine that down a bit also to lighten the load but not exactly what you would call user adjustable. Probably a common failure due to this shortcoming and maybe why this gearbox has been discontinued. Or maybe this is an el cheapo gearbox that was never fitted on any real Honda's. Who knows.