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FJR Motorcycle Forums
Technical & Mechanical Problems
New cruise control get flaky with time/miles
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<blockquote data-quote="ionbeam" data-source="post: 238417" data-attributes="member: 277"><p>I think Constant Mesh and I are about to have overlapping posts here.</p><p></p><p>You can try using 4 ports with one check valve for testing purposes but this is tantamount to having all 4 TBs sharing the same vacuum level. If you can beg, borrow or buy a vacuum gauge it will put this issue to bed. You need to tee the vacuum gauge into the vacuum line going to the servo unit, run the gauge hose up to someplace around the speedo area and tape the gauge such that you can glance at it as you ride. I've done this while troubleshooting a TPS problem.</p><p></p><p>I'm sure you have this under control but I will mention that the throttle cable needs at least 1 5/8 inch travel; 1/16 slack and have 3 beads minimum.</p></blockquote><p></p>
[QUOTE="ionbeam, post: 238417, member: 277"] I think Constant Mesh and I are about to have overlapping posts here. You can try using 4 ports with one check valve for testing purposes but this is tantamount to having all 4 TBs sharing the same vacuum level. If you can beg, borrow or buy a vacuum gauge it will put this issue to bed. You need to tee the vacuum gauge into the vacuum line going to the servo unit, run the gauge hose up to someplace around the speedo area and tape the gauge such that you can glance at it as you ride. I've done this while troubleshooting a TPS problem. I'm sure you have this under control but I will mention that the throttle cable needs at least 1 5/8 inch travel; 1/16 slack and have 3 beads minimum. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
New cruise control get flaky with time/miles
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