Question about Derby bolts
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Joined: Aug 2006
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From: Orange County, CA
Question about Derby bolts
Sorry for duplicate posting (I also put this on tech forum, but think I'll probably get someone on here who is familiar with 06 dynas).
I had a problem this weekend (several actually) with my derby cover bolts.
Have an '06 lowrider.
Used a sears torque wrench - big mistake. Anyway, long story short....
I was using chrome bolts that were 1/8" short in length (due to out-of-stock at harley dealership). One bolt seemed to partially strip with the torque wrench. I removed it, and put back a slightly longer bolt - and it seems to be gripping ok.
However, if I have a problem - what I want to know is wheather there is enough material in the primary cover to put in a heli-coil where the derby cover mounts?
Appreciate any feedback on this. I believe the '06 primary cover is different, so hopefully someone has experience with that. Thanks in advance.
I had a problem this weekend (several actually) with my derby cover bolts.
Have an '06 lowrider.
Used a sears torque wrench - big mistake. Anyway, long story short....
I was using chrome bolts that were 1/8" short in length (due to out-of-stock at harley dealership). One bolt seemed to partially strip with the torque wrench. I removed it, and put back a slightly longer bolt - and it seems to be gripping ok.
However, if I have a problem - what I want to know is wheather there is enough material in the primary cover to put in a heli-coil where the derby cover mounts?
Appreciate any feedback on this. I believe the '06 primary cover is different, so hopefully someone has experience with that. Thanks in advance.
Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,225
From: the 50s & the 60s
RE: Question about Derby bolts
Can you post a picture of that area warren??
I don't remember how much meat is in that area.
If I was to guess, I would guess - yes.
mud
I don't remember how much meat is in that area.
If I was to guess, I would guess - yes.
mud
ORIGINAL: warren888
Sorry for duplicate posting (I also put this on tech forum, but think I'll probably get someone on here who is familiar with 06 dynas).
I had a problem this weekend (several actually) with my derby cover bolts.
Have an '06 lowrider.
Used a sears torque wrench - big mistake. Anyway, long story short....
I was using chrome bolts that were 1/8" short in length (due to out-of-stock at harley dealership). One bolt seemed to partially strip with the torque wrench. I removed it, and put back a slightly longer bolt - and it seems to be gripping ok.
However, if I have a problem - what I want to know is wheather there is enough material in the primary cover to put in a heli-coil where the derby cover mounts?
Appreciate any feedback on this. I believe the '06 primary cover is different, so hopefully someone has experience with that. Thanks in advance.
Sorry for duplicate posting (I also put this on tech forum, but think I'll probably get someone on here who is familiar with 06 dynas).
I had a problem this weekend (several actually) with my derby cover bolts.
Have an '06 lowrider.
Used a sears torque wrench - big mistake. Anyway, long story short....
I was using chrome bolts that were 1/8" short in length (due to out-of-stock at harley dealership). One bolt seemed to partially strip with the torque wrench. I removed it, and put back a slightly longer bolt - and it seems to be gripping ok.
However, if I have a problem - what I want to know is wheather there is enough material in the primary cover to put in a heli-coil where the derby cover mounts?
Appreciate any feedback on this. I believe the '06 primary cover is different, so hopefully someone has experience with that. Thanks in advance.
Outstanding HDF Member
Joined: May 2006
Posts: 2,378
Likes: 1
From: Boise, Idaho
RE: Question about Derby bolts
like mudpuddle mentioned, without seeing it, guess would be that you can likely heli-coil it. it so, i would also recommend you get rid of the junk tork bolts, and get some chrome allen head ones. they make it easier, and less frustraing the next time you do a service. I get mine at Ace Hardware.
Ultimate HDF Member
Joined: Feb 2007
Posts: 7,663
Likes: 7
From: Northeast Ohio
RE: Question about Derby bolts
If you were able to put in a longer bolt and it gripped ok, I would not go to the trouble of a helicoil. Just ensure you get the longer bolt back in the same hole. I agree that you should chase the threads and you may be able to gain a bit more area for contact withthe bolt threads.
Stellar HDF Member
Joined: Mar 2006
Posts: 2,622
Likes: 7
From: Gulf Coast
RE: Question about Derby bolts
Which bolt is it? Not likely to leak any way as long as you got some grip in the bad bolt and the rest of them are ok,especially the upper half.It's just oil slinging around,no pressure.Replaced all my bolts with chrome and just snugged them up good with out a torque wrench,no problem.
Good Luck
Tom
Good Luck
Tom
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From: Orange County, CA
RE: Question about Derby bolts
Thanks to everyone for their input.
Unfortunately it is one of the lower bolts, but I had planned on trying a longer screwn (run a tap first) and hopefully it is ok. I just want to plan in case I do need a helicoil - I have a long trip starting on Friday.
Mud - I'll try to take some pix when I change the bolts out.
I already ordered allen head bolts (chrome) earlier today - so hopefully they will arrive tomorrow.
Thanks again... Warren
Unfortunately it is one of the lower bolts, but I had planned on trying a longer screwn (run a tap first) and hopefully it is ok. I just want to plan in case I do need a helicoil - I have a long trip starting on Friday.
Mud - I'll try to take some pix when I change the bolts out.
I already ordered allen head bolts (chrome) earlier today - so hopefully they will arrive tomorrow.
Thanks again... Warren
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Outstanding HDF Member
Joined: Feb 2006
Posts: 2,958
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From: West Tennessee
RE: Question about Derby bolts
Good luck, I had a hell of a time with mine too. Overtorqued from the factory. Killed three Crapsman torx wrenches on it. Stripped four of the five bolts and had to drill out the heads.
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RE: Question about Derby bolts
To heli coil you will have to drill it out a couple sizes larger right? Why couldn't you tap it and go up to the next size bolt? I mean you will have to drill and tap it anyway for the helicoil to screw into the hole so why not just drill it and tap it with the next size? I guess I'm throwing out another possibility.
I get all my chrome nuts bolts etc. from Fastenal. There is a branch down the street from here. I have to order them but I generally do from the stealer as well. Just picked up a pack of 10 button head seat bolts for 18 bucks.
http://www.fastenal.com/web/home.ex
I get all my chrome nuts bolts etc. from Fastenal. There is a branch down the street from here. I have to order them but I generally do from the stealer as well. Just picked up a pack of 10 button head seat bolts for 18 bucks.
http://www.fastenal.com/web/home.ex
Thread Starter
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Account Suspended
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From: Orange County, CA
RE: Question about Derby bolts
ORIGINAL: StaticSag
To heli coil you will have to drill it out a couple sizes larger right? Why couldn't you tap it and go up to the next size bolt? I mean you will have to drill and tap it anyway for the helicoil to screw into the hole so why not just drill it and tap it with the next size? I guess I'm throwing out another possibility.
I get all my chrome nuts bolts etc. from Fastenal. There is a branch down the street from here. I have to order them but I generally do from the stealer as well. Just picked up a pack of 10 button head seat bolts for 18 bucks.
http://www.fastenal.com/web/home.ex
To heli coil you will have to drill it out a couple sizes larger right? Why couldn't you tap it and go up to the next size bolt? I mean you will have to drill and tap it anyway for the helicoil to screw into the hole so why not just drill it and tap it with the next size? I guess I'm throwing out another possibility.
I get all my chrome nuts bolts etc. from Fastenal. There is a branch down the street from here. I have to order them but I generally do from the stealer as well. Just picked up a pack of 10 button head seat bolts for 18 bucks.
http://www.fastenal.com/web/home.ex
The other advantage (in my view) of using a heli-coil is that the derby cover itself does not need any holes widened (which might be the case with a 5/16") - and also that the bike still uses standard fasteners, so any future service work won't be complicated.
I understand where you are coming from though - and if I'm mistaken about the heli-coil hole size, then it may in fact be a good option to look at.