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July 12th, 2018, 09:01 AM   #11
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up !

anyone can help me
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July 12th, 2018, 11:14 AM   #12
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You don't need those mods on the standard 650 ...if you start adding more power, main bearing and crank spread could be an issue

Is the 650 realiable? Yes it's a lot similar with the ktm frs and they are good engine

The crank on the husaberg and rfs doesn't like to be over rev for too long... it spread like a banana and the main bearing don't like it
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July 12th, 2018, 12:04 PM   #13
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o sorry , I didn't understand that was unnecessary on a stock engine,

I think I will just put ntn bearings when rebuild. thank you !
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July 12th, 2018, 01:11 PM   #14
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I wouldn't call it unnecessary...if you are going to buy a 650 and the engine sound/work OK then use it even if it's got the SKF bearing ...when is rebuilding time you can chose the NTN or other brands if you see that the old one are no good

All I want to say is that on standard 650 engine is good as long you don't over rev it constantly...when you start adding big bore and a lot more hp then you have to be a lot more careful on the component you got
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July 12th, 2018, 02:08 PM   #15
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I already got that 650 , it sounds pretty good for the moment and has 74hours

yes I'll choose ntn cause they have a better reputation ^^ in rebuilding time of course , I'm not going to open now

for the power, it's enough to me for the moment !

thank you my friend
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July 12th, 2018, 08:06 PM   #16
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in order of stress on the main bearings due to crank being too flexible for the style of main bearings we have:

550 (worst)
501
644
628 (least stress)
450 (not a real bike lol)

its not power that is the problem it is average rpm vs stiffness.
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July 12th, 2018, 11:18 PM   #17
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ok so I'm in third position , like your joke on the 450

I would say a big thank for all the knowledge you give here, it's gold !
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July 13th, 2018, 10:58 AM   #18
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Originally Posted by bushmechanic View Post


450 (not a real bike lol)
My poor FS450c feels slighted
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July 13th, 2018, 02:10 PM   #19
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Originally Posted by Goose916 View Post
My poor FS450c feels slighted
we pray for your fs450 ahah
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