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CB750K4 New project
Nurse Julie:
I have a very, very, heavy throttle on my CB550 and mine is definitely the spring. I need to put a different one on but it can wait for a snowy day to be done.
Green1:
Is it like mine and goes light again?
K2-K6:
Make sure you've not taken too much "slack" out of the throttle pull cable.
Honda are specific about this and give a rotation amount of play that should be in the twist grip at rest.
The push/return cable is usually set with no real adjustment possible but if you tighten the pull cable too much it'll give you a conflict as they run differing routes slightly. It'll also feel different from turning the steering lock to lock and may even stop you from being able to turn the throttle in extreme cases.
It looks and feels odd to have what appears alot of play at the twist grip but they are designed like that.
The effort will vary slightly throughout range as those forks on the carb slide shift geometry as you move the throttle.
Nurse Julie:
--- Quote from: Green1 on August 10, 2018, 10:16:39 PM ---Is it like mine and goes light again?
--- End quote ---
Nope, mine stays constantly heavy, bloody makes my hand and wrist ache after not too many miles. I even have 3 little callus's on my hand and a blister...but I do have very small hands so I'm probably just having to grip the throttle so tight to twist it. Hasn't stopped me doing almost 2000 miles on it though 🙂🙂🙂
Seabeowner:
Even fully throttle fully closed the spring on my 500 was still stretched quite a bit. I added a small key ring loop (maybe 9mm) at the top to effectively shorten the distance the spring is stretched over. Not clever enough to work out spring rate change as spring stretched, but still snaps closed and reduced hand fatigue.
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