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Grrr, primary derby cover bolts

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  #1  
Old 07-22-2019, 07:20 PM
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Default Grrr, primary derby cover bolts

4 of 5 gonna have to be drilled. Son of a......
Guess I'm changing the primary oil after the charity ride this weekend.

Aluminum bolts in a steel hole. Great design moco. These are getting replaced with hex heads
 
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Old 07-22-2019, 07:26 PM
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I swapped mine out for allen head bolts by the second oil change
 
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Old 07-22-2019, 07:59 PM
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Deleted.
 

Last edited by RK4ME; 07-22-2019 at 08:06 PM.
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Old 07-22-2019, 08:05 PM
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Amen.
 
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Old 07-22-2019, 08:15 PM
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...did you try to loosen them with a T-25 torx bit instead of the correct T-27 size torx bit??? Ask me how I know.
 
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  #6  
Old 07-22-2019, 08:25 PM
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I saved these links for when I need them. I'll probably just go ahead and order them.
https://www.ebay.com/itm/173679272578
https://www.summitracing.com/parts/arp-621-0515
hth
 
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  #7  
Old 07-22-2019, 08:43 PM
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Adding a thin layer of antiseize on the threads will prevent them from seizing and can be removed easier . I do agree with changing them to a allen head bolt .

+1 on the T-27 torx bit .
 

Last edited by MyFavRk; 07-22-2019 at 08:45 PM.
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Old 07-22-2019, 08:45 PM
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I found that they come loose easier if you ride the bike until it
is HOT and then break the screws loose.
 
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Old 07-22-2019, 09:16 PM
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Haven't been here in a while...

You say you have aluminum bolts in a steel hole. Never seen that. Curious if you meant steel bolts in an aluminum hole...

Anyway, I might suggest helicoil, but what do I know?
 
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Old 07-22-2019, 10:08 PM
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Originally Posted by cprhed
4 of 5 gonna have to be drilled. Son of a......
Guess I'm changing the primary oil after the charity ride this weekend.

Aluminum bolts in a steel hole. Great design moco. These are getting replaced with hex heads
cprhd, you mean to say you purchased it that way brand-new, not preowned from the dealership? OEM??

I am thinking maybe you purchased it on a resale and somebody put aluminum bolts in there?

My eyes popped open when you had to drill out four or five of them. I am guessing the manufacturer would have known better.??

Am I missing something?
 


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