2017 103” engine and cam questions
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Joined: Sep 2009
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From: deland,florida
From what I read, 800rpms is as low as you can go and maintain a proper rate of charge to the battery but unless the motor is idling all the time, I don't see how that is a problem since the motor doesn't idle very long when it is idling. Anything below 800 rpm will probably be hard to maintain idle at that rpm with a carbed motor but should be easier to maintain with an EFI motor. I know my built, carbed all bore 107 would never maintain idle at 800 rpms.
I don't see the harm to set idle at 800 rpms if the motor will maintain it without dying.
I don't see the harm to set idle at 800 rpms if the motor will maintain it without dying.
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A "comfortable" idle can be different from one engine to another, depending upon what has been done.
You can hear it, and to set it to a tach reading sometimes does not apply.
Too low is bad for a couple reasons.
For instance, our race bike didn't "like" it much below 1600-1700.
Would it idle lower?...yes....did it like it?...no.
Scott
You can hear it, and to set it to a tach reading sometimes does not apply.
Too low is bad for a couple reasons.
For instance, our race bike didn't "like" it much below 1600-1700.
Would it idle lower?...yes....did it like it?...no.
Scott
Road Master
Joined: Mar 2020
Posts: 1,077
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From: New England
Sorry to hijack the thread, when I purchased my Thundermax ECM it was sent to me "pre-mapped" for my Stage 1 103HO. The idle RPM was/is set to 896. Mind you, this only applies when the motor is idling at operating temperature. I don't think you can adjust the "cold" idle RPM with the TMax.
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Joined: Sep 2017
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From: Dubuque, IA
A "comfortable" idle can be different from one engine to another, depending upon what has been done.
You can hear it, and to set it to a tach reading sometimes does not apply.
Too low is bad for a couple reasons.
For instance, our race bike didn't "like" it much below 1600-1700.
Would it idle lower?...yes....did it like it?...no.
Scott
You can hear it, and to set it to a tach reading sometimes does not apply.
Too low is bad for a couple reasons.
For instance, our race bike didn't "like" it much below 1600-1700.
Would it idle lower?...yes....did it like it?...no.
Scott
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