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Author Topic: Jetting Q  (Read 857 times)

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Offline SOHC4ever

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Jetting Q
« on: August 14, 2009, 02:55:52 PM »
Hi,

I'm running 105 mains and 38 pilots in my CB750F ('76). The bike has the stock air filter and stock 4 into 1 exhaust.

I did a plug chop yesterday at WOT and they came out white indicating a lean condition at that throttle position.

My question is: how far should I step up the main jets on the first go?

Thanks in advance for your insight.
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Offline bucky katt

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Re: Jetting Q
« Reply #1 on: August 14, 2009, 03:18:34 PM »
i wouldnt go larger than a 110 in it. make sure the airbox is sealed up good, it shouldnt be running lean
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Of all God's creatures there is only one that cannot be made the slave of the lash. That one is the cat. If man could be crossed with the cat it would improve man, but it would deteriorate the cat.
Mark Twain - Notebook, 1894

Offline SOHC4ever

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Re: Jetting Q
« Reply #2 on: August 14, 2009, 03:36:27 PM »
Quote from: bucky katt on August 14, 2009, 03:18:34 PM
i wouldnt go larger than a 110 in it. make sure the airbox is sealed up good, it shouldnt be running lean

Do you think that if I find a leak in the airbox, I should do another chop? Cuz that airbox has issues. For one, I can't get it apart. What's the best way to check? Spray some kind of fluid around the seams and see if it bubbles?
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Offline bucky katt

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Re: Jetting Q
« Reply #3 on: August 14, 2009, 03:54:08 PM »
absolutely, any airbox leaks are going to cause a lean condition.
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Of all God's creatures there is only one that cannot be made the slave of the lash. That one is the cat. If man could be crossed with the cat it would improve man, but it would deteriorate the cat.
Mark Twain - Notebook, 1894
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