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Mechanics 101 Can't get it to run right? Find a trick to add HP?
From the first oil change to completely rebuilding the engine,
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Old 11-07-2007, 06:02 PM   #1
bluekat04
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Question 91-92 gsxr cams in 04 kat?

k i have a 2004 kat that i want to cam up for cheep i have done some looking throught the katriders pages and every one says to use 91-92 gsxr 750 cams in our katanas but according to ron ayers the rockers are differant becuase the 91 gsxrs have 8 lobes per cam and mine only has 4.

i have not taken mine apart yet to be sure but that is what i found on that ron ayers site and if my kat does only have 4 lobes per cam then the 1990 gsxr cams should work with out changing the rockers and what about the older gsxr 1100 cams they have the same four lobe set up but are they longer for the bigger engine.

am i wrong has any one done this to an 2004 yet any info would be great thanks
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Old 11-07-2007, 06:06 PM   #2
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nope 88-89 GSXR 750 cams. I've done it. the 90-92 GSXR 750 is shim 8 lobes per cam. The 90-97 Katana 600 is shim, 8 lobes per cam. The 88-89 and 98+ tuna 600 and all 750 are screw 4 lobes per cam. I don't know what thread you saw that recommended 91 GSXR 750 cams, but I've said 88-89 several times.
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Old 11-07-2007, 06:22 PM   #3
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sweet do you know where i can find some and do i need the spockets from the 750 or can i use mine

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Old 11-07-2007, 06:48 PM   #4
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yours, make sure you use loctite on those two bolts on those, very important. I would suggest buying them new from Ron Ayers.
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Old 11-07-2007, 07:02 PM   #5
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90-97 Kats' were shim type?

Mine is screw type and it's a 91.

What gives?

What year Kat's had screw type valves beside 98+?


That's one of the factors as I keep an eye out for a spare engine

Thanks

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Old 11-07-2007, 07:47 PM   #6
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all 750's were screw, maybe it's 92-97. Yeah it is 92-97
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Old 11-07-2007, 09:59 PM   #7
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what do you suggest for jets with those cams all i have done is a leo vince slip on with a stock header i would like to put on a diff header but dont know what to go with was wondering if the stock gsxr header would bolt up and flow a little better. my bike still has stock jets in it now our elevation is about 5200 feet.

i appreciate the help you guys are awsome i usually work on cars this is all new to me!

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Old 11-07-2007, 10:29 PM   #8
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no,no,no, use the Ivan Katana 600 jet kit. I don't know if your Katana is a 600 or 750, but if it's a 600 use a 750 header and grind out the welds. If it is a 750 use the OEM header grind out the welds.

Ivan's katana jet kit. If your Katana is a 600 use the 750 header and grind out the welds. If it's a 750, use the OEM header and grind the welds.

Last edited by arsenic; 11-07-2007 at 10:29 PM.. Reason: Automerged Doublepost
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Old 11-07-2007, 10:54 PM   #9
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thanks for your help arsenic you have been tons of help and my kat is a 2004 600 just to let you know.
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Old 11-07-2007, 11:42 PM   #10
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no problem, that's what I do.
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