SOHC.co.uk Forums > CB500/550

Lighter clutch and throttle

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550turnip:
The the two main things that bug me about my cb550 k0 are the heavy clutch and throttle, cables are good and oiled so no problems there..do people user a softer spring the carbs, I have seen the apico easy clutch module online..has anyone had any luck with these...any other tips really appreciated.

hairygit:
If they are genuine Honda cables, throw them away and buy new ones, as you say they are oiled, therefore they are knackered. Honda cables have a nylon liner, and if to oil them, the liner swells and can make the cable action stiff, some oils like WD40 can cause them to totally seize.

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550turnip:
I will change the clutch cable and I am sure that will improve things, the throttle cable is new and it's still to heavy, it's annoying on an otherwise lovely bike

K2-K6:
As above WD 40 is mineral oil and so are many other choices.

Silicone oil or grease should be used if anything is chosen.

The bearings within carb actuator assembly need to be particularly cleaned, free and lubricated.

The two metal curves coming out of twist grip have a nylon sleeve inside that you can inspect by pulling them out when off the bike. When worn they cut through with the cable (particularly pull side) and the friction that the sleeve was there to mitigate goes appreciably higher. This is more than likely on aged cables or not there on pattern part.

The twist grip has a proscribed "slack" specified in the Honda manual,  that's crucial in stopping the two cable binding each other especially when steering is turned and throttle used. You can check for this by swinging to each lock stop and trying the throttle for binding.  It will also cut those nylon sleeves (above) quickly if operating like that.

All things set correctly they aren't bad,  but compromised they can be bloody awful.

550turnip:
I most people would find my bike ok, it's me I am fussy..I just hate heavy throttles and clutches, the spring on the carbs feels way to strong..I am going to look at sourcing another and will install a new clutch cable and try the apico easy clutch..I will go through it all, I have just noticed there is no throttle return cable fitted

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