22348bCVC
Zone Head
Posts: 798
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posted June 25, 2002 03:22 AM
cams
I understand that if/when I ADJUST the valve clearance, the cams need to be removed. So, if that's the case...
1) What's the purpose of replacing the intake cam with an exhaust cam?
2) What does indexing the cams accomplish/gain?
3) Are these worthwhile mods and procedures on a stock displacement 12R engine (with full exhaust/PC3R/K&Ns?)
An inquiring mind wants to know 
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kawachan
Pro
Posts: 1031
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posted June 26, 2002 12:49 AM
I want to know about #1 also!!
I think the answer to #3 is yes from what I have read.
I am sure Y2K knows....??? and others, too.
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RED NINJAS RULE!!
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted June 26, 2002 01:59 AM
The common practice on alot of bikes is to replace exhaust cams with intake cams. The intake cams are bigger in most bikes.
I crunched the numbers and couldnt find an acceptable timing setting for using an intake on the exhaust side.
There is a valve clearance issue with the zx12.
The Bussas respond well to this because the cams in a bussa are very mild compared to the 12. The exhaust cam on the 12 is much bigger than the intake cam on the bussa.
Degreeing the cams is worth a few ponies but it also can chenge the power delivery of the bike. Dont expact huge gains thou.
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jessz1
Expert Class
Half the wheels, twice the fun
Posts: 373
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posted June 26, 2002 01:10 PM
I gained three HP from degreeing my cams...
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I'm never satisfied.
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kawachan
Pro
Posts: 1031
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posted June 27, 2002 07:43 AM
quote:
I gained three HP from degreeing my cams...
What did you degree them to?? Can you tell HP in the bottom and top end, too?
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RED NINJAS RULE!!
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swft
Needs a life
Full throttle!
Posts: One MEEEEEELLION
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posted June 27, 2002 08:03 AM
Wow, ya know it's been so long since I had that done, I can't remember what they were degreed to, but I saw a similar gain in power. I know that Muzzy's has recommendations for the 1270 kit, but don't recall what they were.
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justoyz2
Zone Head
Justoyz Racing
Posts: 858
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posted July 01, 2002 11:20 AM
Muzzy reccomends 105/100. Mine is 105/105 The low mid high pull is greater. I was running a 16/49 gearing, I have since changed to 17/49. I don't know how it will pull now
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