I'm after decreasing the amount of "twist" on the throttle to fully open the carbs on the period custom 650. I don't want to change the top end of the cables so the pull/push mechanism no longer is inside the switch gear housing, so my thoughts turned to the carb end of the cables. If I fabricate a new one and increase the diameter of the X butterfly thingy which the cables locate into that would have the same effect correct?
Firstly is there one available to save me fabricating one. If I have to fabricate one I'll either have to make a completely new one with a larger diameter or add to the existing one to increase the diameter.
Anyone done something similar or has ideas on how to achieve the desired end result?
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Quick action throttle options
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warren3200gt
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Quick action throttle options
PUM 488 June 2026
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
Re: Quick action throttle options
You need a SMALLER cable wheel on the carbs to achieve the quick action effect.
It may be possible to deepen the groove on the existing wheel but maybe not enough scope to make a significant difference.
It may be possible to deepen the groove on the existing wheel but maybe not enough scope to make a significant difference.
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Julian_Boolean
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Re: Quick action throttle options
Or you can make the twist grip end bigger by gluing on a piece of plastic pipe to the existing throttle tube
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martinz1000r
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Re: Quick action throttle options
I have a Domino fast action throttle on one of my track day bikes. That version is twin cable but they do other versions.
Z1000R, Moto Martin GPz, z900 A4 Crosby Replica, Harris Magnum 2, Suzuki GSXR 1100 Slabbie, SP1 Hoonda x 2, Katana 1100, Bimota SB6R and Tuatara
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warren3200gt
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Re: Quick action throttle options
zed1015 wrote:You need a SMALLER cable wheel on the carbs to achieve the quick action effect.
It may be possible to deepen the groove on the existing wheel but maybe not enough scope to make a significant difference.
Doh, course it does.
might be able to achieve single handful full throttle by doing a bit both ends in the ways suggested.PUM 488 June 2026
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
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