oem sprocket teeth sheered off? - MVAgusta.net
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post #1 of 21 (permalink) Old 11-02-2013, 05:54 AM Thread Starter
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oem sprocket teeth sheered off?

So I finally got my bike out for a decent ride and I just had new sprockets installed. Checked the bike over after the ride 2 teeth sheered at the top? I had Oem z40 installed which is alloy. Chain is not too tight and correctly adjusted. What could it be?
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post #2 of 21 (permalink) Old 11-02-2013, 06:24 AM
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The OEM sprockets on a 750s are steel, not alloy. What make of sprocket is it? It may be faulty, certainly I would look to the supplier to replace it, a word of warning there are a number of cheap copy parts around which are a danger. Be careful, a lock up at speed could cause a lot of damage to both you and the bike.

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post #3 of 21 (permalink) Old 11-02-2013, 06:30 AM
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You also may have been given the wrong chain pitch...520 v. 525.

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post #4 of 21 (permalink) Old 11-02-2013, 09:08 AM
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Quote:
Originally Posted by jimboF4 View Post
The OEM sprockets on a 750s are steel, not alloy.
jimboF4
The rear sprockets on my 750 SPR are alloy...all 3 choices. I purchased an OEM alternate rear sprocket for my 910R in a sale once, not realizing it was for a 750 and would not work. That sprocket was also alloy. (later sold at for a great price to another forum member).

So maybe some 750s had steel rear sprockets, but not in my experience.

I think Chuck may be on to one possibility. Very unusual to knock teeth off with new chain and sprockets.

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post #5 of 21 (permalink) Old 11-02-2013, 03:47 PM Thread Starter
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The sprocket I had put on was OEM MV Agusta sprocket, and it's definitely alloy. The front appeared to me to be steel. The 2 teeth that were sneered have been sneered from the very top point and to the outer corner. If I knew how to post pictures I would show you guys.
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post #6 of 21 (permalink) Old 11-02-2013, 03:48 PM Thread Starter
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*sheered
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post #7 of 21 (permalink) Old 11-02-2013, 06:33 PM
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Thumbs down missing teeth?

msfc;
the diagonal shearing of teeth, is sprocket misalignment

there have been different chain lines used by MV (Italians are sloppy about chain lines)

somewhere you got mismatched parts

are you using the original style rear sprockets?

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post #8 of 21 (permalink) Old 11-02-2013, 08:46 PM Thread Starter
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I am using a direct replacement parts OEM. I bought the rear sprocket from Paul Feeney group brand new. The part was expertly matched to my bike.
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post #9 of 21 (permalink) Old 11-02-2013, 09:44 PM
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Quote:
Originally Posted by msfc View Post
I am using a direct replacement parts OEM. I bought the rear sprocket from Paul Feeney group brand new. The part was expertly matched to my bike.
I would tend to lean towards Silentservice 703's advice, Chain width (520-525). Then check what Noel said about alignment..

Last edited by spypyp; 11-02-2013 at 11:11 PM.
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post #10 of 21 (permalink) Old 11-02-2013, 11:05 PM
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Quote:
Originally Posted by spypyp View Post
I would tend to lean towards Silentservice 703's advice, Chain pitch. Then check what Noel said about alignment..
Spiros;
the pitch is all the same 1/2", only the width changes 1/4"-5/16" (520-525)
you can run 525 on 520 sprockets, but not the other way around

msfc;
"expertly matched to my bike" by PFG might be a problem,
given their past issues

misaligned sprockets on new chain is the worst

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Last edited by theknurl; 11-02-2013 at 11:07 PM.
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