SOHC.co.uk Forums > CB500/550

Advice appreciated

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hairygit:
Because like it or not, your first instinct is to pull the clutch in!

florence:
I thought the second cable was there because the throttle has a friction screw hold it open.  With the screw done up the throttle will not close unless you force it to by pulling it shut with the other cable?

LesterPiglet:
No, Florence. I've had my bike since 1986 with 1 throttle cable and it works the same as any other single cable throttle.

matthewmosse:
Florence, I think only the early bikes had the friction screw to hold the throttle open, I know only my 72 500/4 project has one on the undrside of throttle. It's perfectly rideable without the second cable most of the time, but having a spare cable pretty well fitted is a massive help for an emergency get you home measure as well as being handy in case of malfuncion - I'd rather have one fitted than not, especially on motorways or distance work. I'd simply not belive it adds to the stiffness or heavyness of the throttle unless the cable was in an awfull state. A quick actung / 1/4 turn throttle might help with not having to move the twist grip through such a wide range of movement - it's actually this that I think gives the wrist ache.

Bryanj:
The first 750's had a 4 into 1 throttle cable and severa; riders reported that at wide open throttle there were times when the throttles would not close, even though each carb had it's own spring.

Along with the continuous need of adjustment this prompted Honda to design (or get the carb manufactureres to design) the later assembly where the carbs were linked, the second cable is there to enable you to shut the carbs down when the return spring breaks, as they were once prone to.

In todays market with insurance companies as they are, not having one could be counted as an "Unsafe" modification that you ought to tell them about or they can, and will, invalidate your cover.

I can remember back in the early 70's that any Mini that crashed with a less than 21 yr old driver the insurance company paid to have the head removed and the bore/stroke measured to see if a bigger engine hadbeen fitted, if not they paid for re-assembly---if yes they walked away from the claim just paying for the time to strip down

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