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Old 07-13-2007, 03:28 PM   #1
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Default Ninja .21 Bearings Rear

Does any one have the Dims for the rear main bearing for the Ninja 21.
I need to get a new one, so I want too replace with a ceramic one.
Thank you
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Old 07-13-2007, 05:59 PM   #2
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14 x 25.4 x 6

http://tkocompetitiondev.com/shop/pr...roducts_id=157
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Old 07-13-2007, 07:51 PM   #3
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Quote:
Originally Posted by TonysScrews View Post
Are you sure???
I called AMAIN HOBBIES this morning, and talked to a Heather. she told me this bearing does not fit the Ninja .21 B1 engine. And I was told by my LHS that any Novarossi Engine main bearing will fit.
I'am not able to find anywhere a published spec on the size of the bearing anywhere, to include the user Manual. I do not have a Micrometer to measure myself.
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Old 07-14-2007, 12:56 AM   #4
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100% positive.

I swapped the front and rear stock bearings for TKO ceramics in my Ninja .21 up at EB Mods and then dynoed the motor to see the results.
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Old 07-14-2007, 08:01 AM   #5
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Quote:
Originally Posted by TonysScrews View Post
100% positive.

I swapped the front and rear stock bearings for TKO ceramics in my Ninja .21 up at EB Mods and then dynoed the motor to see the results.
Ok great. Did'nt you do a review of those results here on RC TECH???
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