twista
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posted February 14, 2008 04:21 PM
Bearing Drag???
OK,, i got 2 sets of bearings,, i set is STOCK kawasaki ! and the other set i ordered a while back from World Wide Bearings,, my question is which set should i use?? when i have the Stock ones in my hand there is more noticeable drag versus the aftermarket set,, is that because they are packed with more grease or something,, you would think that the drag free bearing would be the way to go,, but factory oem parts are usually the way to go,, so my question is which set should i use,, the stock tighter ones,, or the looser aftermarkets?
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dougmeyer
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posted February 14, 2008 04:43 PM
You can't really compare the bearings unless they are free from grease and only have some very light oil on them. I'm not so sure that even if you did that you could detect any difference at all. Variations in the quality of metallic ball and roller bearings from different manufacturers go more to material - goes to load bearing capability, and durability- goes to holding those tolerances over time, rather than perceived "friction" at finger twirling speeds.Where and by whom were the "World Wide Bearings" made? They are after all a reseller, and do not manufacture bearings. In fact there are only a few really top notch bearing manufacturers in the world. Lots of Chinese copies, though.
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NOX
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posted February 14, 2008 06:32 PM
Which bearings are they.....
My stockers with no pc, and just the right amount of lube have run 124mph on a good track in the 1/8 mile,
Durability, and keeping the bike together are priority one........
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twista
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posted February 14, 2008 06:48 PM
 Edited By: twista on 14 Feb 2008 18:49
OK,, now how bout a point in the right direction,, i cant see the ball bearings as they are sealed,, but when i stick 2 fingers thru the hole and rotate the outer,, there is a NOTICEABLE DRAG on the OEM Kawasaki bearings,, on the other it spins more freely,, what would you guys use,, thats all im asking?
what is this right amount of lube about,, i dont think you can pack these as they are sealed?? care to elaborate further?
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NOX
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posted February 14, 2008 07:08 PM
You can take the seals out, if you know what you are doing. What bearings are they?
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twista
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posted February 14, 2008 07:50 PM
i have 2 sets,, stock kawasaki oem wheel bearings front and rear,, and a set of aftermarket for the wheels also?
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KZScott
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posted February 14, 2008 08:30 PM
ok, im going there, dont hate me lol. are the aftermarket ones ceramic?
how about post a pic so we can see the difference in seals?
for the record, i dont want to get into a fight about bearings, just curious 
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
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twista
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posted February 14, 2008 08:47 PM
Edited By: twista on 14 Feb 2008 20:49
no problem,, im just here to pick you guys' brains,, and then use the set that will work best,, i gotta be honest other than the seals (that hide the ball bearings on both sides) which are different in color,,(OEm is like an Orange) and the other ones have a dark blue,, the ONLY difference is the free spinning characteristic or the NON OEM versus the tighter OEM,,
maybe they packe em good in JAPAN? beats me,, gonna take some picks and post..
hang tight
OH BTW,, these are not ceramics,, just plain jane OEMs versus ACME bearing co. LOL?
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twista
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posted February 14, 2008 09:14 PM
as you can see they are identical,, this goes for both sides.. any input is appreciated..
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tuusinii
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posted February 15, 2008 05:25 AM
With the OEM You can't go wrong - they are good quality!
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NOX
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posted February 15, 2008 05:43 AM
Pull the seals, lube em just right........, if you are drag racing. for street use, make sure they are lubed plenty.......
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twista
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posted February 15, 2008 06:35 AM
when you say pull the seals,, you mean the orange or blue things that are covering the balls right,, how do you do that? and do they need to go back on?
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shane661
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posted February 15, 2008 08:46 AM
Edited By: shane661 on 15 Feb 2008 08:47
The difference you are feeling is likely due to a thicker grease in the OEM's. I bet that once it gets warm from friction it is just as easy to spin. Leave the seals in...unless you need that last .05 at the expense of reliabilty and increased maintenance.
Shane
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twista
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posted February 15, 2008 09:33 AM
OK,, so do you think i should use the stockers?
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twista
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posted February 15, 2008 12:20 PM
13 posts and 1 reply on which set i should use?
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NOX
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posted February 15, 2008 02:11 PM
Sorry, use the stockers.......
Forgot to put that........
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2010 TMRC Super Street Points Champion
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2009 PMRA Super Street Points Runner-Up
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dougmeyer
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posted February 15, 2008 02:57 PM
The greatest drag on those bearings is FROM THE SEALS. You can't make any judgement about bearing drag with seals in the picture. hte problen with removing them is that it's a one way street. Once you pry them out you can't put them back in. That's whay they're called "Sealed Bearings". In many instances where wheel bearing drag is a consideration, folks do run them unsealed and lubed with very light grease or oil. This requires constant inspection and care. Small pieces of grit will hurt a ball bearing in short order, negating any benefit from running them unsealed. Twista- Put the OEM replacement bearings in and go race. Your brake pads are putting far more drag on the wheel that the bearings ever will.
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NOX
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posted February 15, 2008 03:00 PM
Like I said, if you are VERY careful, you can take them out and put them in. But hey, what do I know........,
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2010 TMRC Super Street Points Champion
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2009 PMRA Super Street Points Runner-Up
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twista
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posted February 15, 2008 03:09 PM
Thanx Guys!,, you know i never thought about the seals themselves contributing to drag!
it was just weird that the one has more drag than the other.. it is probably due to the viscocity of the grease like shane said,, i will go ahead and use the OEMs.. can always sell the others or use them in the future for a spare set of wheels.. thanx guys
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KZScott
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posted February 15, 2008 10:17 PM
i say put 50 miles on both sets and report back  see how they compare after that. come on, you know you wanna do expirements like Karl lol 
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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ninja12
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posted February 16, 2008 05:37 AM
Pull the seals , clean all oil with brake cleaner, then re-oil with machine oil.
I'll bet it spins just as easy as any other bearing out there.
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