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Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

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  #61  
Old 16th January 2022
t120r t120r is offline
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Join Date: Jan 2009
Posts: 220
Sportster/Buell Model: xl883r
Sportster/Buell Year: 2003
Reputation: 3596
t120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rough
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I made the mock trigger wheel easy enough. Wired up the megasquirt with just power, ground and the cam sensor. I'm not getting any trigger reading on the Tuner Studio logger. On the bench, the sensor tests good though. Probably something not configured correctly.
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  #62  
Old 17th January 2022
t120r t120r is offline
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Sportster/Buell Model: xl883r
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t120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rough
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I put in the recommended 1k pullup resistor and now i get a trigger signal on the tuner studio log. Next weekend I'll play with my vfd and spin up my trigger wheel to 4000rpm. If i get a clean signal with 24 teeth, then I'm golden. If not, I'll try 12 teeth.
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  #63  
Old 25th January 2022
t120r t120r is offline
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Sportster/Buell Model: xl883r
Sportster/Buell Year: 2003
Reputation: 3596
t120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rough
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So I made a makeshift trigger wheel with 24 teeth minus 1 tooth. That works out to 0.125" per tooth, Couldn't pick up a thing on the tuner studio logger. Here's a clip:

https://youtu.be/QtupWNW0B3w

I made another wheel, by hand so it's not perfect. It was -12 degrees celcius in my garage, so I rushed it. I never had a 1/4" endmill, so I made 8 teeth. 3 of them were 0.250", and 1 of them was 0.200" and the other 4 were almost 0.385". Moving it by hand, every tooth was picked up on tuner studio. I spun it to 2720rpm on my mill and tuner studio kept the signal. So I think 12-1, with 0.250" teeth, is the limit of the harley sensor. Here's a video:

https://youtu.be/kpGf7dRZInQ

Last edited by t120r; 25th January 2022 at 20:40.. Reason: Wrong video link
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  #64  
Old 22nd February 2022
t120r t120r is offline
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Join Date: Jan 2009
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Sportster/Buell Model: xl883r
Sportster/Buell Year: 2003
Reputation: 3596
t120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rought120r is a jewel in the rough
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So the efi intake fits rather well with 1/16" removed from each spigot. Needs a little clearancing for the carb side allen bolts though. I marked with a sharpie where they need a bit of material removed.
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