SOHC.co.uk Forums > CB500/550

Cb500 K0 Heavy throttle return spring

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florence:
I do think it is worth saying that even with the correct set up the return spring is quite heavy compared to other bikes I've ridden but I think that is a good thing, it is very positive in it's action.  There is an adjusting screw which puts a little pressure on the throttle.

Johnwebley:
a stiff throttle on a 500 can be caused by trapping a cable in the L/H tank mount,

when refitting the tank,always make sure the cables are free,and move ok when you  check the steering at lock to lock,

but I agree,the return spring is strong,so much so,I fitted a jubilee clip on the twistgrip to help hold it open

K2-K6:
To all the other good advice I'd add that the manuals usually spec some slack in the twistgrip, either if mm  or perhaps degrees,  this is to allow the difference of the two cable routes to be accommodated without binding one against the other.
If you turn the steering fully left or right then some small slack should remain at the grip, if not then the cables will start to cut into the nylon sleeves inside those two metal bends coming out of the twist grip.
I've seen someone take all of the slack out with the steering straight and then pull one of the cable ends off at full lock.
Any binding makes it much harder to turn especially when you've got the throttle closed on overrun and trying to bring the power back in smoothly.

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