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Author Topic: Changing the firing order via the cam.  (Read 1201 times)

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Offline wera90ex

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Changing the firing order via the cam.
« on: July 29, 2021, 05:17:13 AM »
 Working on a 77 750F for a friend. He wants a different sound. Has anyone used a reground cam to fire 1 and 4 and 2 and 3 at the same time?
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Offline MRieck

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Re: Changing the firing order via the cam.
« Reply #1 on: July 29, 2021, 01:24:49 PM »
I know some guys that did it for a hillclimber
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Offline wera90ex

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Re: Changing the firing order via the cam.
« Reply #2 on: July 29, 2021, 02:35:19 PM »
I was thinking it would be pretty torquey. Just wondering if they cryoed the crank or cam.
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Offline T1m32sh1n3

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Re: Changing the firing order via the cam.
« Reply #3 on: July 30, 2021, 05:07:10 AM »
Big Bang cam
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Online Don R

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Re: Changing the firing order via the cam.
« Reply #4 on: July 30, 2021, 11:30:27 AM »
 I'm thinking I read someone cut and welded a cam just for a test. 
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Offline 754

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Re: Changing the firing order via the cam.
« Reply #5 on: July 31, 2021, 06:59:19 PM »
I would like to try one on my next.. Sort of built for Torque  motor..
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Online Don R

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Re: Changing the firing order via the cam.
« Reply #6 on: August 01, 2021, 12:39:30 PM »
 It would need to be a billet cam unless a lot of welding was done. I'd check with the leading cam guys.
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Offline MRieck

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Re: Changing the firing order via the cam.
« Reply #7 on: August 01, 2021, 02:30:24 PM »
Quote from: Don R on August 01, 2021, 12:39:30 PM
It would need to be a billet cam unless a lot of welding was done. I'd check with the leading cam guys.
The cam I was speaking of was manufactured on a blank billet. Nobody has blank billets for the CB750 right now.....part of the COVID shut down which effected production.
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Online Don R

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Re: Changing the firing order via the cam.
« Reply #8 on: August 01, 2021, 03:44:45 PM »
 The world wide supply chain is a thing of amazement. My friend that works at Holley said most aftermarket production is covered by excess production in the factories that make new cars and bikes. When the factories are behind on their main job, the extra work is difficult to get done. 
 
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No matter how many times you paint over a shadow, it's still there.
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 You don't need a weatherman to know which way the wind blows.

Offline turboguzzi

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Re: Changing the firing order via the cam.
« Reply #9 on: August 01, 2021, 10:09:09 PM »
somewhat related, im on holidays in Umbria, center of italy and we wanted to buy e-mtbs for our trip to this wild mountian range,
well, there were NONE to be found in any shop in italy, or whole of EU for that matter, physical shops or online... factories are just out of dozens of critical components that they cant source, havent supplied new bikes for a while now,
had to go second hand from a guy who rents and renews his fleet every year.... he had his new ones pre-ordered before this mess
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