SOHC.co.uk Forums > Project Board
Doms CB550F1 project
andy120t:
Is any of that filter/drain stuff at the bottom necessary or can it just be removed. Isn’t it US West Coast emissions related, or something similar?
Oddjob:
Yeah it was emission related, California related almost certainly.
You can ditch it all and just fit the 500 filter, keeps cleaner as well. Vent the pipe from the breather over to atmosphere.
Either keep the old stuff or sell it on, your choice.
Seabeowner:
The wires to the solenoid may have been reversed as the RHS switch has been replaced at some point. The early 500s only had the yellow /red to the switch and that was then earthed through the bars. The 550Fs switches have two wires to the switch (the yellow/red and a green/red I think) that completes the circuit.
DomP:
--- Quote from: Oddjob on August 18, 2023, 06:25:23 PM ---Yeah it was emission related, California related almost certainly.
You can ditch it all and just fit the 500 filter, keeps cleaner as well. Vent the pipe from the breather over to atmosphere.
Either keep the old stuff or sell it on, your choice.
--- End quote ---
Using a 500 air filter sounds a far simpler option to me, and this won't affect carb jetting from standard? I'm also missing the airbox lid😫
Oddjob:
The snorkel fitted to the 550 can be replaced by the tool tray off the 500 as well. It was fitted to reduce induction noise mainly. Jetting will be fine.
Roo has a couple of the tool trays which are far handier than having the snorkel fitted, they ain't cheap however as they are getting ultra rare these days but you can also get a spare fuse holder in it as well, which can be very handy.
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