December 24th, 2013, 03:02 AM | #1 |
ninjette.org guru
Name: harry
Location: Central Florida
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Clutch Basket
After only 6,500 miles, the clutch basket is getting loose enough to irritate me with the noise and vibration at idle (unless I keep the clutch pulled in).
Question: Am I stuck with the rubber damper type basket, or do I have any alternatives? I know the "New Gen" uses springs instead of the rubbers. Will the "New Gen" basket fit a "Pre Gen"? Are the new OEM baskets improved in any way over the stock 2006 one in my bike. The old KZ650-750 used the basic same style of clutch basket, and they got loose too, but being 4 cylinder they were not as noisy. The rubber gets hard and fails. I found one reference in a forum where an enterprising owner/machinist had new rubbers cut by water-jet, made new rivets and rebuilt his. One of my old contacts in the Pro Dragracing world can custom rebuild the stock basket, but that would be several times the cost of a new stocker. Suggestions?
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December 24th, 2013, 04:33 AM | #2 |
Daily Ninjette rider
Name: Hernan
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Slightly press the clutch lever while idling.
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December 24th, 2013, 12:14 PM | #3 |
wat
Name: wat
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i have read about someone replacing the rubber dampers with new hand cut rubbers. i forget where i saw it. it didn't look hard
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December 25th, 2013, 08:49 AM | #5 |
ninjette.org guru
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Thanks
Thanks Alex. The author of that thread did what most people don't, provide real and usable info like part numbers and complete descriptions.
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"They don't pay me enough to ride this thing!" Kenny Roberts after winning the Indy Mile on the TZ750 powered Grand National bike. |
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December 25th, 2013, 11:33 AM | #6 |
wat
Name: wat
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yw. post updates on your progress. i'm morbidly curious to see your clutch basket
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December 25th, 2013, 12:22 PM | #7 | |
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Quote:
They don't do much more than unnecessarily weaken the cushions (.... yes, I know better than the Japanese engineer that designed those ). I was not joking in my previous post. A light pressure hurts nothing and eliminates or reduces the annoying noise.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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December 26th, 2013, 03:33 AM | #8 |
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Name: harry
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I intend to buy an E-bay basket to work with, and swap it in if it goes well.
When I was drag racing, I used a "slider" clutch from a company called MTC Engineering. They converted the stock basket to a purely centrifugal design. They used a special cutter to cut the stock rivet heads down instead of drilling them out. When they reassembled the unit, they held everything together in a jig and TIG welded the rivets to the backing plate. The clutch held up to 200+ HP without failure.
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"They don't pay me enough to ride this thing!" Kenny Roberts after winning the Indy Mile on the TZ750 powered Grand National bike. |
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December 26th, 2013, 10:25 AM | #9 |
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Name: harry
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Just scored a complete clutch assembly from E-bay for $16.00 from a 2005 model. Should be here in a few days. Will update.
For those watching this, the part number for the silicone material has changed since the original poster did the posting. The new part number for the tubing is 5546T56. The cost for a 6" piece is $5.37 plus freight.
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"They don't pay me enough to ride this thing!" Kenny Roberts after winning the Indy Mile on the TZ750 powered Grand National bike. Last futzed with by fast1075; December 26th, 2013 at 11:48 AM. Reason: more info |
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December 26th, 2013, 11:54 AM | #10 | |
ninjette.org guru
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Quote:
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December 27th, 2013, 08:55 AM | #11 |
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The newgen uses replaceable springs and not rubber. I would be curious what is involved in getting one to fit a pregen.
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December 27th, 2013, 10:06 AM | #12 |
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Name: harry
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Got the piece of silicone tubing today on UPS! WOW! what quick shipping. McMaster Carr ROCKS!
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"They don't pay me enough to ride this thing!" Kenny Roberts after winning the Indy Mile on the TZ750 powered Grand National bike. |
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December 27th, 2013, 01:54 PM | #13 |
wat
Name: wat
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i have a spare newgen clutch and trans if you want to send me a pregen engine.
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December 30th, 2013, 01:11 AM | #14 |
ninjette.org member
Name: AZ
Location: Orlando FL
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What if it rattles even when idling while the clutch is pulled all the way in in 1st gear?
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December 30th, 2013, 07:30 AM | #15 | ||
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Quote:
Quote:
The rubber dampers can be replaced as in the link above, but I think you need a machine shop to do it. It looks pretty difficult to me.
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December 30th, 2013, 02:26 PM | #17 |
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How about measuring it, counting teeth, etc.?
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December 30th, 2013, 02:45 PM | #18 |
wat
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i can do that, sure. what all do you want measured? just the gear that hooks up to the output shaft? i'll give you some photos and you can count the teeth.
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December 30th, 2013, 04:37 PM | #19 |
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Maybe like the shaft diameter and the height of the basket when laid flat on a table. Also the thickness of the gears. And the diameter of the gears. I should be able to get a better idea with that info. And yes, some good clear photos to count the teeth. That would help for sure.
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December 31st, 2013, 09:08 AM | #20 | |
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Quote:
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December 31st, 2013, 09:19 AM | #21 |
ninjette.org certified postwhore
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Mines been rattling for 30,000 miles so I don't think it hurts anything much.
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December 31st, 2013, 02:54 PM | #22 |
Jersey Devil
Name: Daks
Location: Austin, TX
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Reading this, I'm assuming it's the same issue my bike is having. Just got back from a 2 week vacation and noticed the clutch knocking something fierce in neutral until I pulled in the lever. Sometimes it would slip into neutral after shifting up to 2 as well, though that could be rider error with new boots.
It almost seemed like enough to keep it from starting right, but he could just be grumpy after not being touched for 2 weeks
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December 31st, 2013, 03:07 PM | #23 |
Daily Ninjette rider
Name: Hernan
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That is the way our bikes tell us that they were built to roll every day.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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January 2nd, 2014, 08:58 AM | #24 |
ninjette.org guru
Name: harry
Location: Central Florida
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My $16.00 used clutch just came in. There is no slop in the gear on it, so I will install it and see how it goes. And the fiber discs are within spec and look good. I will use a couple of the steels to build a hub tool. Just need to go pick up a cover gasket. Hopefully the local Kawi shop has one in stock.
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January 2nd, 2014, 09:46 AM | #25 | |
wat
Name: wat
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Quote:
B) use an impact wrench to take the clutch hub nut off, it will make a nearly impossible job, a piece of cake. literally takes 5 seconds with the clutch tool and impact wrench. C) shops never carry the 250 gasket. if you still have most the gasket left you can patch it up with gasketmaker but if its turned to dust it will end up leaking with just gasketmaker. save a trip and order the gasket... or i guess you could call first.. but who the hell uses a telephone these days
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January 2nd, 2014, 02:09 PM | #26 |
ninjette.org certified postwhore
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or you could just print one out by going to my blog. You'll need to use gasket paper and a wide printer.
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February 1st, 2014, 04:12 PM | #27 |
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Name: harry
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I finally found time to do something with the clutch. Remarkably easy job. The old clutch basket, as I suspected had a ton of play in it, but remarkably no rubber pieces in the oil strainer. I put the used basket I bought on E-bay in it, and also the inner since it had no grooves from the steels.
The strainer had the usual bits of case sealant since it had never been cleaned, no metal or rubber, or anything scary. Put it back together with new gaskets, oil filter, and some fresh Amsoil 10-40. The "raging gremlins with tiny banging hammers" sound is gone at idle. I will in the future take the old basket apart, and try to rebuild it. I will post pics when I do. I came up with a unique tool to tighten/loosen the hub nut since I didn't bother to order a hub tool.
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"They don't pay me enough to ride this thing!" Kenny Roberts after winning the Indy Mile on the TZ750 powered Grand National bike. |
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February 1st, 2014, 05:30 PM | #28 |
wat
Name: wat
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i imagine this is pregen? do you know how different the newgen is? do you have one for newgen? i'll give you a dollar to make a newgen one.
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February 1st, 2014, 06:10 PM | #29 |
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No problem. Send me a dollar and a newgen engine and I'd be happy to.
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March 30th, 2014, 11:25 PM | #30 |
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Anyone ever find out if the pregen will fit the newgen clutch assembly?
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March 31st, 2014, 02:42 AM | #31 | |
pregens for the win!
Name: Andrew
Location: Los Angeles
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Quote:
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April 1st, 2014, 04:15 PM | #32 |
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April 1st, 2014, 05:30 PM | #33 |
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Here is the one that I made. It requires sacrificing a clutch disk, but since I had a spare set, I went ahead and made the mods to it to make it hold the clutch basket in place while I turned the big nut.
The four tabs are made from a 1" wide steel strip and bent at a 90 and then riveted to the disk so that it can lock the two clutch basket sections together. Then I use a flat screwdriver between the gears to lock the basket so I can turn the nut. The tool on ninja250.org used a string to hold the outer basket, but I like my way because it is more durable.
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May 27th, 2014, 04:39 PM | #34 |
CPT Falcon
Name: J.Emmett Turner
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Still curious about what can swap.
The clutch covers have the same bolt pattern, IIRC. |
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