 914-6 throttle hard to depress |
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| mb911 |
 Mar 28 2021, 10:59 AM
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#1
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914 Guru  Group: Members Posts: 6,905 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest 
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As my conversion nears the end I am working on all the odds and ends. I find the throttle is a bit hard to push. If the cable is disconnected there is no issue. I believe the issue is the bell crank area. Its almost as though it needs a spring to assist or a bigger mechanical advantage. Any advice.. ?
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| Mark Henry |
Mar 28 2021, 11:12 AM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
What bell crank are you using?
911 bell crank you have to heat it cherry red, melt the brass and give it a quick turn. |
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| mb911 |
Mar 28 2021, 11:15 AM
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#3
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914 Guru Group: Members Posts: 6,905 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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Here is my setup.
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| sixnotfour |
Mar 28 2021, 11:22 AM
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#4
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914 Wizard Group: Members Posts: 10,438 Joined: 12-September 04 From: Life Elevated..planet UT. Member No.: 2,744 Region Association: Rocky Mountains 
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accel cable looped over clutch cable ??
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| mb911 |
Mar 28 2021, 11:28 AM
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#5
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914 Guru Group: Members Posts: 6,905 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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QUOTE(sixnotfour @ Mar 28 2021, 09:22 AM)  accel cable looped over clutch cable ?? It could be.. I will have to figure out how to see that angle. |
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| Retroracer |
Mar 28 2021, 02:01 PM
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#6
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Senior Member Group: Members Posts: 617 Joined: 7-July 13 From: Bend OR Member No.: 16,100 Region Association: Pacific Northwest
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Two suggestions:
1) separate the linkage where the cable ends and make sure the cable/throttle pedal are moving freely and are not snagged or rubbing anywhere (kind of a 2 person job, one keeping tension at etc transmission end, the other pressing the pedal) 2) there are several bell cranks involved in the journey from throttle ending up to carbs - all the links in between should be adjustable for length. This is the key bit: It is worth going through and making sure the sweep of all the angles is maximized over the full range of butterfly rotation by adjusting the lengths of the individual rods; hard to describe without diagrams, but by shortening one link and lengthening another you can make sure each pivot arc is making the longest throw possible, and not "over rotating" on the extremes. Hope the above makes sense... - Tony |
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| mb911 |
Mar 28 2021, 02:06 PM
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#7
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914 Guru Group: Members Posts: 6,905 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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I found it wrapped around the brake line. Its much better now.. not as smooth as I would like but pretty good. I will check the bell cranks etc for max adjustments.
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