2013+ F4 Hub question - MVAgusta.net
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post #1 of 9 (permalink) Old 06-24-2019, 03:14 AM Thread Starter
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2013+ F4 Hub question

Hello

New F4RR owner here and was wondering if the weak hub design is affecting the 2013+ F4 models ?

I also read somewhere to loosen and re-tighten the swingarm pinch bolts to 20Nm instead of the 28 but not sure if that's the case with this particular model

Thanks!
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post #2 of 9 (permalink) Old 06-24-2019, 07:13 AM
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The rear hub was improved in 2010. High swing arm pinch bolt torque can still distort the bearings. Torque to low side of spec, or Noel's spec ....just use a good torque wrench.

I used to be fast....now I just dream about it.
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post #3 of 9 (permalink) Old 06-28-2019, 03:38 AM
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Quote:
Originally Posted by esq'z me View Post
The rear hub was improved in 2010. High swing arm pinch bolt torque can still distort the bearings. Torque to low side of spec, or Noel's spec ....just use a good torque wrench.
I'm so sick of fighting against this BULLSHIT.......I've sold over 1,200 3810-2RS bearings.......with ZERO FAILURES
TORQUE THE PINCH BOLTS TO NO MORE THAN 15LBFT/20Nm
GLADLY MY BEARING SALES ARE ALMOST ZERO......PEOPLE ARE LISTENING TO ME, NOT YOU

Ed, I tested what it took to distort the bearings did you????? you used to say it was chain tension......
So I sent you an outer race that was brinnelled 360, didn't look at it did you........if you did you'd know it wasn't chain tension
I sent one to Carl too, he didn't catch it either

What you don't know is from '65-'69 I worked in the Engineering Dept of HiShear Corp an aerospace fastener manufacturer
Guess what section? Installation Tools ......so all I worked on was feeding fasteners and torquing them
If I didn't have any work I'd go to the Metallurgical Lab and learn from my mentor Louie Ecker, formerly Chief Metallurgist
at North American Aviation for 28 years......I'd known him since I was 5

Please don't post the BULLSHIT FACTORY TORQUE NUMBERS ANYMORE
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post #4 of 9 (permalink) Old 06-28-2019, 06:58 AM
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You never sent me any dead parts Noel. Maybe Carl, not me. Anyway, yes, I know you did distortion tests and proved your point.

I used to be fast....now I just dream about it.
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post #5 of 9 (permalink) Old 06-28-2019, 07:42 PM
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Ed,
I sent it to Carl and he was supposed to send it to you.......and I wanted it back but that didn't happen either

It was a perfect example of the destruction of a bearing
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post #6 of 9 (permalink) Old 06-29-2019, 09:59 AM Thread Starter
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Quote:
Originally Posted by theknurl View Post
I'm so sick of fighting against this BULLSHIT.......I've sold over 1,200 3810-2RS bearings.......with ZERO FAILURES
TORQUE THE PINCH BOLTS TO NO MORE THAN 15LBFT/20Nm
GLADLY MY BEARING SALES ARE ALMOST ZERO......PEOPLE ARE LISTENING TO ME, NOT YOU

Ed, I tested what it took to distort the bearings did you????? you used to say it was chain tension......
So I sent you an outer race that was brinnelled 360, didn't look at it did you........if you did you'd know it wasn't chain tension
I sent one to Carl too, he didn't catch it either

What you don't know is from '65-'69 I worked in the Engineering Dept of HiShear Corp an aerospace fastener manufacturer
Guess what section? Installation Tools ......so all I worked on was feeding fasteners and torquing them
If I didn't have any work I'd go to the Metallurgical Lab and learn from my mentor Louie Ecker, formerly Chief Metallurgist
at North American Aviation for 28 years......I'd known him since I was 5

Please don't post the BULLSHIT FACTORY TORQUE NUMBERS ANYMORE
I will def order a set from you in the future but for the time being is it fine to torque the pinch bolts to your recommended numbers or is it meant for the aftermarket system? (20nm)
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post #7 of 9 (permalink) Old 06-29-2019, 10:58 PM
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Quote:
Originally Posted by wowjudo View Post
I will def order a set from you in the future but for the time being is it fine to torque the pinch bolts to your recommended numbers or is it meant for the aftermarket system? (20nm)
Torque the pinch bolts to 20 nm regardless of hub installed (although Mitchy's hub can probably withstand more). Overtighten pinch bolts at your own peril.

I used to be fast....now I just dream about it.
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post #8 of 9 (permalink) Old 07-04-2019, 04:25 PM Thread Starter
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Quote:
Originally Posted by esq'z me View Post
Torque the pinch bolts to 20 nm regardless of hub installed (although Mitchy's hub can probably withstand more). Overtighten pinch bolts at your own peril.
Ok done that, thanks!

I also made sure to have the chain stretch on the loose side aswell
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post #9 of 9 (permalink) Old 07-04-2019, 06:11 PM
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wowjudo,

What these blokes said. The new hub is better but the spacers are shit. After about 30000k you can no longer torque up the hub nut without locking the rear wheel due to hub spacer wear. Then try finding hub spacers! Then buy a Mitchy hub!

Cheers

Deano
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