The five speed looks similar in overall layout to the 4 speed - built to allow access to normal wear items. The spring accesses behind the outer cover and is straightforward. Snidals will guide you through it, but it's fairly obvious how it works once the cover comes off.
The kickstart is a "must run" item. On one of my bikes I found the KS stub shaft actually fractured, but still working. I was in there because the pawl had gone on holiday. The
order lag time is an issue for you, so
this is what I would keep as parts on stock:
1) Springs -
2X; Fatigue or manufacturing defects can kill these
2) Pawls -
2X; high stress part, wear is not kind to these items
3) Pawl Plunger -
2X; cheap & easy to lose
4) Pawl Spring -
2X; cheap & easy to lose
5) Kick Start shaft O-ring -
2X; seals oil in
--these items below live under the inner cover, a bit more work to get to and they MUST work well---6) Kick Start stub shaft assembly -
1X; another high stress part, comes with pawl, spring & plunger. (about £30)
7) Kick Start Gear assembly -
1X; if this is worn very much at all, even a new pawl will have some slippage. I examined the old one against a new one and saw only minor wear, but it made a big difference in engagement. (about £45)
Shipping for all of these bits is likely the same as getting a KS shaft for free against being ordered separately. Once they are on your shelf you're set for any contingency, a big deal in Brunei.
5-spd
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https://www.hitchcocksmotorcycles.com/partsbook-pages/1864PART No. 550040; £45.40
1ST GEAR ASSEMBLY, LAYSHAFT (5 SPEED) 500cc +SIXTY5
PART No. 550015; £30.70
KICKSTARTER SHAFT ( KS + ES, 500cc + SIXTY5 ) 5 SPEED
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https://www.hitchcocksmotorcycles.com/partsbook-pages/1863#page-1863-position-12PART No. 140333; £5.25
PAWL, FOOTSTARTER
PART No. 140332; £1.90
PLUNGER, KICKSTARTER PAWL
PART No. 140331; £0.48
SPRING, FOOTSTARTER PLUNGER (EACH)GER
PART No. 146450; £3.40
SPRING, KICKSTART (140324)
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https://www.hitchcocksmotorcycles.com/partsbook-pages/1862#page-1862-position-11PART No. 550031; £0.40
O-RING, KICKSTART SHAFT (5 SPEED)
Good Hunting - ACR -