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This may or may not be related.  This year on the 79 Intruder that my nephew runs we had an occasional rumble.  Turned out to be one of the bottom center wheels contacting the drive nubs on the track.  Bearing was ok, but fit in the wheel was not good.  Popped in a different wheel and the rumble went away.
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 Even the higher priced ones in your 2nd link are made in China..... :o
I don't know.....some of the Chinese bearings don't seem too bad...I've tried a few.
Usually an ad on a site will say "OEM replacement"....yep, cheap Chinese.
I might try them in the skid wheels, but any chaincase, driveshaft, or jackshaft bearing I'm finding an NTN bearing.
I think SkiDoo, Polaris, and Cat have used a lot of NTN's as original equipment usually.
SKF is another excellent brand. Yamaha has usually used excellent Koyo bearings.
SKF's site shows different 6205 bearings with one of  them rated to 18,000 RPM!
We certainly don't need one that good...
I can usually find one of those 3 manufacturer's common bearing, whether it is a 6205, or a different size, somewhere on the web for a pretty decent price.
Some Auto stores around me have some NTN brand bearings in stock..although they usually have cheaper ones, too.
I really don't know.....if you replace the bearings in all the wheels in a skid frame, that can add up to quite a few bucks for "brand name" bearings.
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The last day of Braapfest this year my 81 Invader started to have the rumble of something loose.  Turned out to be a wheel bearing for one of the 6.375 diameter suspension idler wheels.  I fixed that but still it does not turn smooth like I would prefer so since all the bearings are the same age I should just replace them all.  It seems there are 2 grades ( 6205-2RS and 6205-2RS C3 ) of this size bearings but is the extra cost worth it??

https://www.ebay.com/itm/6205-2RS-Ball-Bearing-Dual-Sided-Rubber-Sealed-Deep-Groove-20PCS/322193750879?hash=item4b043e7b5f:g:WMIAAOSwfVhaCi3D

https://www.ebay.com/itm/Qty-10-6205-2RS-C3-EMQ-Premium-Double-Sealed-Bearing-25x52x15mm/302117065933?hash=item46579494cd:g:ibgAAOSwImRYDkvr:sc:USPSPriorityMailSmallFlatRateBox!54024!US!-1



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General Discussion / Re: Thinking of the next project
« Last post by Interceptor398 on May 19, 2018, 09:22:15 PM »
Too many things going on here this summer to monkey with the 303.  Interceptor suspension is still at the to of the sled to do list.  Guess I should give it a squirt of gas to see if it will fire??

If she fires on a squirt of fuel, you will win.

LOL, now I will need to give it a try!
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General Discussion / Re: Thinking of the next project
« Last post by mswyka on May 19, 2018, 10:35:54 AM »
Too many things going on here this summer to monkey with the 303.  Interceptor suspension is still at the to of the sled to do list.  Guess I should give it a squirt of gas to see if it will fire??

If she fires on a squirt of fuel, you will win.
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Picture of the week / Re: Picture of the week, here we go!
« Last post by DougKauer on May 19, 2018, 09:53:28 AM »
I'm sure there are quite a few Kawasaki's out there that have been owned for some time by people like us on this site that are wonderful, clean examples.
But, it is pretty cool that I happened upon the '79 Invader recently that I posted on here, and you found this low mileage LTD. Proof that there are still some really nice ones out there, folks!!
Keep your eyes open... :D
                                            Found that pic of your 79. Very nice indeed.
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General Discussion / Re: Thinking of the next project
« Last post by Interceptor398 on May 19, 2018, 07:10:59 AM »
Too many things going on here this summer to monkey with the 303.  Interceptor suspension is still at the top of the sled to do list.  Guess I should give it a squirt of gas to see if it will fire??
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General Discussion / Re: Thinking of the next project
« Last post by mswyka on May 19, 2018, 06:22:54 AM »
I also have one of the 303's that I have never heard run.  They are a cool motor and the little old lady I got it from said it was very reliable.

So, would you be interested in a little friendly race to see who can get their 303 running first?

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Picture of the week / Re: Picture of the week, here we go!
« Last post by rminier on May 18, 2018, 04:53:43 AM »
 I'm sure there are quite a few Kawasaki's out there that have been owned for some time by people like us on this site that are wonderful, clean examples.
But, it is pretty cool that I happened upon the '79 Invader recently that I posted on here, and you found this low mileage LTD. Proof that there are still some really nice ones out there, folks!!
Keep your eyes open... :D
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Picture of the week / Re: Picture of the week, here we go!
« Last post by DougKauer on May 17, 2018, 04:32:47 PM »
she is all original , and not restored. Will be showing her this summer and then enjoying the winters out here in Mass. :)
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