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Old 12-28-2009, 03:46 PM   #1
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What should the stock engagement rpm be on a 98 ZR 600 EFI? Mines engaging at 5000 rpm- seems high to me. Stock clutching I believe- Yellow/White primary spring. If it is wrong, what would be the cause of it? And how do you disassemble these clutches if I need to? Thanks guys.
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Old 12-28-2009, 04:11 PM   #2
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Sled: '99 ZL 600 EFI, '79 Yamaha Excel V
10-11 Mileage:
09-10 Mileage: 500 miles!!!
08-09 Mileage: too little (55)
Stock engagement is around 4,500 to 5,000 rpm. Your clutch could be wearing out, and you do need special tools to take it out. (clutch puller)
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Old 12-28-2009, 05:51 PM   #3
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Sled: 2002 ZR 600 CCE
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09-10 Mileage: 600
08-09 Mileage: 200
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My 2002 zr 600 efi 5,000 rmp on engagement .. But I have a yellow / red spring
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Old 12-28-2009, 07:09 PM   #4
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Sled: 2002 Arctic Cat ZR 600 EFI CCE
08-09 Mileage: 800+ (So Far)
Mines around 4500 and its jerky i heard they come from factory jerky next year my uncles got a clutch package (goodwin clutch) thats suppose to be more torque more top end and smoother engagement. Suppose to be a lot easier on the sled so ill spend the 300-400 dollars for the parts. That jerkiness is hard on those drive parts :P
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Old 12-29-2009, 02:12 AM   #5
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<div class='quotetop'>QUOTE (Delow @ Dec 28 2009, 05:11 PM) <{POST_SNAPBACK}></div>
 Quote:
Stock engagement is around 4,500 to 5,000 rpm. Your clutch could be wearing out, and you do need special tools to take it out. (clutch puller)[/b]
What in the clutch would wear out and make the clutch engage at a higher rpm?
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Old 12-29-2009, 10:14 AM   #6
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Sled: F7, ZR900
ATV: BF 750
The bushings in the primary wear out and cause it to stick which causes the higher engagement. The weight bushings are the main culprit but the main bushings should be replaced too. Your primary clutch should be rebuilt every 2000 miles.

<div class='quotetop'>QUOTE </div>
 Quote:
Mines around 4500 and its jerky i heard they come from factory jerky next year my uncles got a clutch package (goodwin clutch) thats suppose to be more torque more top end and smoother engagement. Suppose to be a lot easier on the sled so ill spend the 300-400 dollars for the parts. That jerkiness is hard on those drive parts[/b]
MOTOMAN, at 4500 RPM engagement should not be jerky. Don't take this the wrong way but I would guess any jerkiness is caused by you. After you get used to the sled you should be able to take off very smoothly. BTW the 600 non-APV twin doesn't make any HP at low RPM's that's why you need the high engagement and with all of the 600 clutch setups on here for around $100 I would never buy anyone's $300 kit.
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