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sacred screw and alternate throttle bodies

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Kaladin:
1.  Is the sacred screw only a matter of idle quality, or is there something that I don't anticipate?   My red Norge idles very rough, and the paint is missing from the sacred screw.  Obviously it has been ridden thousands of miles in this condition, and I would normally live with it,  but because I am used to my silk smooth silver Norge it is annoying.  The stepper motor was bypassed 12 years ago.

2.  If I opted to buy some used throttle bodies and stepper motor to try to improve it, will the 8 valve throttle bodies work with the 4 valve engine, or do I have to be specific?  They seem to be easier to find.

Thanks
mark

Bulldog9:

--- Quote from: Kaladin on November 07, 2025, 04:17:39 PM ---1.  Is the sacred screw only a matter of idle quality, or is there something that I don't anticipate?   My red Norge idles very rough, and the paint is missing from the sacred screw.  Obviously it has been ridden thousands of miles in this condition, and I would normally live with it,  but because I am used to my silk smooth silver Norge it is annoying.  The stepper motor was bypassed 12 years ago.

2.  If I opted to buy some used throttle bodies and stepper motor to try to improve it, will the 8 valve throttle bodies work with the 4 valve engine, or do I have to be specific?  They seem to be easier to find.

Thanks
mark

--- End quote ---

Huzo did some experimenting and wrote on this a while back.

It is the factory set of the TB's throttle stop/idle speed, and very difficult to get right once messed with. There are two on the TB, the one on the bellcrank is OK to touch for syncing the TBs (high speed 3Krpm), the other is 'sacred' should not be touched, and is the setscrew that your throttle stop comes up against. Both have paint.

Kaladin:
I understand, and wouldn't mess with it, but I bought it pre-violated.  I suspect that one of the prior owners was trying to get it to idle correctly with the stepper motor removed.

So since it is already messed with, I am wondering if it is just an idle problem.

Tom H:
I think Roper did a write up on the Norge TB's. You might do a search for that on your favorite search engine. IIRR it's basically like resetting a V11.

Tom

guzzi ride:
2.  If I opted to buy some used throttle bodies and stepper motor to try to improve it, will the 8 valve throttle bodies work with the 4 valve engine, or do I have to be specific?  They seem to be easier to find.

The 8V TB's will not work on your 2 valve motor.

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