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Old 04-06-2013, 10:25 AM   #4
lkchris's Avatar
Joined: Feb 2005
Oddometer: 1,041
You'll have to search pretty hard to find the correct jetting. It may take trial and error.

The intial jetting assumed 500cc cylinders, and 40 mm intake valves.

This won't be the same for 400cc cylinders and 32 (?) mm intake valves.

R80 jetting might be close, as the bike doesn't "ask" for any more air and you can bet your bottom dollar it wasn't being "strangled" by the 32mm carbs.

You understand of course that switching to 40mm carbs requires new hand throttle gearing and new throttle cables to match as the R80 items aren't the same as those used with R100 (40mm) carbs.
Kent Christensen
'12 R1200RT, '02 R1100S, '84 R80G/S
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