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 Topic: RC valve movement.. 







Enessr

 
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RC valve movement..

Enessr » Wed Mar 18, 2026 3:45 pm

Evening all,
Before tearing down my engine to replace the knackered
crankshaft I noted that after finally getting the bike
to stay running, both rc valve pulleys would kind of
Shift open to close rapidly.
Is this normal behaviour?
Now, after completing the rebuild I've noticed that
both pulleys are always on the low setting, closed.
Even if I rev the bike to 2000rpm they don't move,
if I manually move a pulley to full open and then turn on
the ignition, the pulleys go straight to their default
low position bit don't do anything else.
Bit difficult to rev the bike to 10.000 rpm as I have
an underground garage and the tenants above have
already busted my bawllz a few times..
Any ideas?
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