A10 GF Gearbox sprocket question

[scotty]

Greetings all

My A10 GF gearbox marked STD needs a sprocket.

How many a tooth does a man need on his sprocket ?
I'm seeing 18,19,20 & 21 toothed options.

I plan to replace bearings,seal and gaskets.
Assuming all is well with gears et al, are there any other bits in there one should consider replacing for peace of mind while she's stripped bare?

Enquiring minds would like to know

cheers

scotty

[muskrat]

G'day Scotty,
                   19 is std, great for around town. 21 is good for highway but your speedo will be out (reading slower)
Cheers

[a10 gf]

Have tried 19, 20, 21 (A10 plunger)

21 = a real pain to use in town and traffic, acceleration negatively affected, but fine in 4th over 40mph.
19 = quick in town, good acceleration, but high revs in 4th.
20 = the compromise (currently fitted), somehow still a little too much clutch use to get going in 1st, but nice enough lower revs at speed.

[BSA_54A10]

Probably a bit late now, but I always use a sprocket that has the engine sitting in it's "sweet spot" as close as possible to the middle of the speed range that I normally ride in .
I can live with a bit of extra clutch slip if it means that I can still hold a beer after 4 hours in the saddle or not looking for an excuse to get off the bike

[scotty]

Thanks for the input

i think i will try a 20 toother

cheers

scotty

[groily]

Reckon that's a good choice. Noticeably better for what I do than the 19 that was on there. Acceleration still reasonable, cruising speed slightly improved. A sweet compromise, which works well 2-up as well. But I do live in a rural part of the world where clutch-killing traffic congestion is non-existent and arm-ripping acceleration unnecessary.