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Discussion Starter #1
The bike in question is a 2002 F4 750 EVO 3.

The hub that came with this bike is decidedly different from the hub that was originally in my 2007 F4 312R.

It also differs from the hubs shown in any of the manuals or parts diagrams.

Here is the hub that came out of this F4:

DSCN0800r.jpg

DSCN0804r.jpg

DSCN0805r.jpg

This collar is the issue:

DSCN0806r.jpg

I am installing Mitchy Hub 007 on this bike and that collar has no place to go:
DSCN0801r.jpg

DSCN0802r.jpg

DSCN0803r.jpg

The question: Will I damage anything by not having that "spacer" in place?

What am I missing here?

Thanking all-y'all in advance......:wtf:
Chuck:smoking:
 

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That hub and spacer You show in the first pictures is a 2010+ hub and most likely also the axle.
The spacer is needed so that Your sprocket will not slide towards the wheel.
From where do I know?
From experience with my sprocket carrier / hub ground off.
So what Mitchy has now on offer for the 2010+ axle is his secret.
But I bet his hubs are for pre 2010 applications only.
Good ones indeed.
 

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Ahh, if You look into the 2010 edition of a parts manual You will find the hub, spacer, axle.
 

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That hub and spacer You show in the first pictures is a 2010+ hub and most likely also the axle.
The spacer is needed so that Your sprocket will not slide towards the wheel.
From where do I know?
From experience with my sprocket carrier / hub ground off.
So what Mitchy has now on offer for the 2010+ axle is his secret.
But I bet his hubs are for pre 2010 applications only.
Good ones indeed.
N0,my hubs are suited to all model MV's.Y10 models have to use the early spacer fitted to pre 2010 model bikes.
 

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The bike in question is a 2002 F4 750 EVO 3.

The hub that came with this bike is decidedly different from the hub that was originally in my 2007 F4 312R.

It also differs from the hubs shown in any of the manuals or parts diagrams.

Here is the hub that came out of this F4:

View attachment 176561

View attachment 176569

View attachment 176577

This collar is the issue:

View attachment 176585

I am installing Mitchy Hub 007 on this bike and that collar has no place to go:
View attachment 176593

View attachment 176601

View attachment 176609

The question: Will I damage anything by not having that "spacer" in place?

What am I missing here?

Thanking all-y'all in advance......:wtf:
Chuck:smoking:
Hi Chuck,sorry it's taken so long to see this,you know the time difference thing.
To answer your question the hub you showed is the upgrated hub and uses that spacer only.
With my hub you need the early spacer as pictured.76mm OD,50mm ID,2mm wide.
I sent some spacers to Noel and Alex at GP Racing. Can you ask either Noel or Alex to post you one.They are free of charge to anyone who purchases my hubs,especially you my friend.
Please don't try and fit the stepped spacer to my hub.

mms_img1006589432.jpg
 

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Yeah what Mitch just said above is right Chuck.

You cannot use that flanged collar which although is applicable to the 'uprated' MV Agusta hub.....( it also reminds me of what is supplied with the Design corse pre 2010 hub http://www.mvagusta.net/forum/showthread.php?t=94433)

You need the 76mm x 50mm x 2mm flat spacer as Mitch has said.
You CANNOT use your new hub without this as it will result in the same damage that Ralf experienced.
Brian:)
 

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Chuck, btw, why exactly are You changing the hub ?
It can not have that many miles I imagine.
I would take it if You want to get rid of it.
 

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Mitchy are You sure that the 2010+ axle fits Your hub ?
The 2010+ axles have different seats for the bearings.
Here is the fitting instructions for the 2010 hubs for comparison.
Yes mate,I made the hub to suit all MV F4 and Brutale's,all years.The only difference with the Y10 axle is the bearing land on the wheel side is wider which suits my hubs perfectly.I have both axles.:)
 

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Chuck, btw, why exactly are You changing the hub ?
It can not have that many miles I imagine.
I would take it if You want to get rid of it.
Because he wants a strong,reliable hub.:mouthwate
 

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Discussion Starter #11
To all...first, let me say thanks and this is a great community!

The bike was purchased second hand and I wasn't paying detailed attention to the seller. He did mention hub failure and replacement.

I am fitting the Mitchy hub because I have one and I forgot that the original hub had been replaced. I want Cindy to feel bulletproof on this bike.

I just got off the phone with Noel and he thinks I may need the 66 mm spacer as the carrier is not the quick change, but rather the original. Here a re a couple of pics BEFORE I cleaned up the sprocket and carrier:

DSCN0797r.jpg

DSCN0798r.jpg

DSCN0799r.jpg

Tomorrow I will take some pictures of the axle and post them up.

Ralph, are there measurement I should take to determine if the axle is 2010 or later?
 

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Tomorrow I will take some pictures of the axle and post them up.

Ralph, are there measurement I should take to determine if the axle is 2010 or later?
Chuck as Mitch wrote the landing for the bearings are wider.
You see the comparison in the fitting instruction, old vs. new.
I do not have any measurements but it should be obvious.
And I guess Your hub would have failed without the 2010 axle.
 

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Mitchy I believe Your hubs are great and reliable.
Same could be said about the 2010+ hubs or did You heard about any failures ?
Only 3 failures Ralf that have been reported on this forum.
 

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Chuck don't stress about axles,either axle will be fine.You probably have the upgraded axle with the wider bearing land which is as I have previously mentioned is perfect for my hub with the twin bearing set-up.Your only worry is the OD of the spacer to use which depends on which aftermarket carrier you purchase.I have seen so much drama with incorrect spacers used with carriers.

100_1117.jpg

100_1120.jpg
 

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To all...first, let me say thanks and this is a great community!

The bike was purchased second hand and I wasn't paying detailed attention to the seller. He did mention hub failure and replacement.

I am fitting the Mitchy hub because I have one and I forgot that the original hub had been replaced. I want Cindy to feel bulletproof on this bike.

I just got off the phone with Noel and he thinks I may need the 66 mm spacer as the carrier is not the quick change, but rather the original. Here a re a couple of pics BEFORE I cleaned up the sprocket and carrier:

View attachment 176633

View attachment 176641

View attachment 176649

Tomorrow I will take some pictures of the axle and post them up.

Ralph, are there measurement I should take to determine if the axle is 2010 or later?
Sorry Chuck, it was early in the morning when I replied,forgetting you were refering to the 750,and yes the spacer is 65mm OD,50mm ID and 2mm wide.I only make the 76mm OD spacer which Noel and Alex have.Comments on the axle are correct as stated.
 

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Chuck don't stress about axles,either axle will be fine.You probably have the upgraded axle with the wider bearing land which is as I have previously mentioned is perfect for my hub with the twin bearing set-up.Your only worry is the OD of the spacer to use which depends on which aftermarket carrier you purchase.I have seen so much drama with incorrect spacers used with carriers.

View attachment 176665

View attachment 176673
Aaahhh!! Very cool and well designed!! Compliments on that!
 

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Thanks Erik,just hope Chuck is clear on what has to be done,and I want his lovely wife to be safe too.:)
I am sure he is. Makes it all very clear now!
 
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