Cam missing one tooth??? - MVAgusta.net
 4Likes
  • 3 Post By esq'z me
  • 1 Post By Bumpkin
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 01-21-2019, 06:42 AM Thread Starter
New Member
 
ManiacDray's Avatar
 
Join Date: Aug 2017
Posts: 46
Cam missing one tooth???

Hi all

Bike is at workshop and mechanic tells me there is one tooth missing??? Not an MV Mechanic so he is baffled as well.

2012 MV Agusta Brutale 920. He checked the manual and according to that, its missing one tooth? Is this normal?

Not sure if its needs to be replaced or kept as is, Check pics
Attached Images
  
ManiacDray is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 01-21-2019, 07:04 AM
Old Wing Nut
 
esq'z me's Avatar
 
Join Date: Aug 2007
Location: Marietta, GA
Posts: 18,515
Send a message via Skype™ to esq'z me
No it is not !!! That is the "phonic wheel" or crank position sensor trigger. It is technically a "reluctor" and when the gap passes the sensor the signal is generated to the ECU.

I would be very suspicious of this "mechanic's" skills if he doesn't understand that.

Where on this planet are you located? Please add that to your profile.

I used to be fast....now I just dream about it.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, '70 Suzuki F50 (Baby Blue)
esq'z me is offline  
post #3 of 10 (permalink) Old 01-21-2019, 07:24 AM Thread Starter
New Member
 
ManiacDray's Avatar
 
Join Date: Aug 2017
Posts: 46
My apologies, I'm located in South Africa and unfortunately MV has pulled out. All dealerships closed down and mechanics I know of has relocated.

Once again I apologize. I'm not too bright with these things lol. He says lining everything up on the cam and crack shaft shows that there is one tooth missing? Not sure if this makes sense? He has followed the manual accordingly.

The mechanic is brilliant, but this is the first time for him seeing this. There is no slack in chain and everything else inside is good. Just this one missing tooth when lining up it catching us off guard.
ManiacDray is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old 01-21-2019, 07:47 AM
Senior Member
 
silentservice703's Avatar
 
Join Date: Feb 2008
Location: Duxbury, MA, USA
Posts: 21,206
Send a message via Skype™ to silentservice703
Here is an image from the engine manuals that show the alignment. If your mechanic doesn't understand the gap in the phonic wheel,then find another one.

Is it possible you didn't understand the terms he was using and to what "tooth" hes was referring?

What you pictured is at the bottom of this image...it is not a CAM. The engine could be out of time if one of the cams (at the top of the image), or the shaft (at the bottom of the image) "SKIPPED" a tooth.

Name:  1.JPG
Views: 190
Size:  167.5 KB

Gapalicious 2020 at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
from Sept. 23-Sept.27, 2020

Call (423) 519-2000 or (423) 253-6213 to reserve your Riverfront Cabin. PM me for The Crow's Nest reservation!!!

Email/Paypal:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



'07 F4 312R, '10 B4 1090RR, '15 B3 800RR
'07 Ducati Monster S4Rs, '07 Ducati Monster 695
2010 Harley Davidson Ultra-Classic Electra-glide CVO FLHTCUSEBLK
'63 Honda C100A Cub
'61 MVA TRA 125

Last edited by silentservice703; 01-21-2019 at 07:50 AM.
silentservice703 is offline  
post #5 of 10 (permalink) Old 01-21-2019, 08:17 AM Thread Starter
New Member
 
ManiacDray's Avatar
 
Join Date: Aug 2017
Posts: 46
Okay so this is how he said I should explain.

When you set you crank shaft mark, the scribe lines on top of the cam shaft is not flush with the cylinder head on the intake. But the pins in between are correct. Its like it seems that the cams are slightly turned forward almost by 1 tooth.

And if you line up the scribe marks on top of the cam shaft with the cylinder head, the scribe line on crank shaft is slightly lower than where it should be. Like he says almost 1 tooth.

I hope this explains it better, I suck at this haha.
ManiacDray is offline  
post #6 of 10 (permalink) Old 01-21-2019, 10:20 AM
Old Wing Nut
 
esq'z me's Avatar
 
Join Date: Aug 2007
Location: Marietta, GA
Posts: 18,515
Send a message via Skype™ to esq'z me
What you are describing is cam shafts that are not timed correctly. He will need to remove the cam chain tensioner and re-time the cams.

It is probable that someone adjusted a valve clearance and missed the cam timing when they put it back together.... or pulled the tensioner to replace and didn't notice the chain "jumped" a tooth in the process. Easy to do.

The bike will not run properly with the cam timing advanced.

Now .... IF the intake cam mark is level with the gasket surface, the pin count is correct, and the exhaust cam mark is below horizontal...then you have a cam chain that is stretched and needs to be replaced.

Question? how many miles/kilometers on your bike? Show the drawing SS703 provided to your mechanic. That should help him decide what to do if he is indeed any good.

And do please add your locale to your profile.

I used to be fast....now I just dream about it.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, '70 Suzuki F50 (Baby Blue)
esq'z me is offline  
post #7 of 10 (permalink) Old 01-21-2019, 02:52 PM
Old Wing Nut
 
esq'z me's Avatar
 
Join Date: Aug 2007
Location: Marietta, GA
Posts: 18,515
Send a message via Skype™ to esq'z me
Quote:
Originally Posted by hokums View Post
If you search the forum, you’ll find this is common to a number of bikes, including mine......it will run fine.....it’s just one of those ‘Italian’ things.
It may run "fine" but it may not be performing as it should. The timing marks are there with a purpose. If they are not aligned correctly then something is wrong.

It can be a real PIA to get the cams timed correctly. R1andrew and I had to go through the process several times on Mona Lisa before it cam out right....but it did come out right.
R1andrew, ManiacDray and nigelrb like this.

I used to be fast....now I just dream about it.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, '70 Suzuki F50 (Baby Blue)
esq'z me is offline  
post #8 of 10 (permalink) Old 01-21-2019, 02:57 PM
Senior Member
 
Bumpkin's Avatar
 
Join Date: Apr 2016
Location: Herefordshire, UK
Posts: 1,627
New Site Garage
Check that your mechanic is turning the crank the right way too, cranks on these bikes run in the opposite direction to most other bikes. Turning the wrong way may give the impression of the slight timing errors he's seeing. Show him the illustration that silentservice703 posted, the chain run at the back needs to be under tension with the tensioner towards the front of the bike taking up the slack. From the side as show crank direction is clockwise.
esq'z me likes this.

Chas
Previously a MY16 Turismo Veloce Lusso
Defected to a Ducati Multistrada 1260S Touring
Bumpkin is offline  
post #9 of 10 (permalink) Old 01-21-2019, 06:38 PM
Senior Member
 
Tony F's Avatar
 
Join Date: Aug 2008
Location: Christchurch New Zealand
Posts: 284
New Site Garage
From the post above I take it that with the crank mark lined up correctly the exhaust cam times correctly but the intake is out by almost one tooth. Is that correct?

Also as above, it would be helpful to know the distance the bike has travelled.

My F4RR had a camchain replaced under warranty some time ago and I recall the dealer saying the cam timing marks didn't fully line up on reassembly. There was a half tooth difference but I cant remember if it was on one or both camshafts. After consultation with the factory it was timed so that any wear or stretch in the chain moved the timing to the correct position. So differences do arise.
Tony F is offline  
post #10 of 10 (permalink) Old 01-22-2019, 03:35 AM
Established Member
 
Join Date: Mar 2018
Posts: 124
Ahaha, i suggest to change mechanic
misty5 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to use all of the features of the MVAgusta.net site, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome