SOHC.co.uk Forums > CB500/550
CB550 refurb
DomP:
Interested to know too, Ken suggested to me to do as you have because I was missing so much of the 550 air filter internals.
Johnny4428:
Don’t want to be sucking unfiltered air such as up through the plenum drain, maybe just needs capped?
Bryanj:
I think the original 500 plenum drain was flattened at the end with a slit in it so you could squeeze it open to drain water out
Johnny4428:
I just checked on CMS and still available Bryan.
Oddjob:
The plenum drain hose has a one way return valve fitted at the bottom, to empty the hose you squeeze the tube and it lets out any water collected. Saying that, it’s something I’ve never done, they just don’t seem to collect any, or maybe it evaporates during the summer months. As for the hole in the bottom of the air filter box, just leave it, it’s not doing anything and it may help get a little more air into the box if anything obstructs the air duct.
500 filters last longer than 550 ones due to less contamination caused by the recycling system, what a waste of time and money that was, all because of California and it’s anti smog measures.
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