Snapped All Thread Mounting Bolt

MrLarkins · #1 (**permalink**) 06-21-2008, 07:17 PM

Well, crap.

I waited 1 week to get replacement gaskets in the mail. I received them today, put them on, and took the bike for a spin. Now it ran smooth as ever, until...

IT SNAPPED RIGHT OFF!

At first, I thought it just wiggled loose and fell out, so I drove around looking for it and I got lucky and found the bolt/nut part. That's when I noticed it wasn't complete. The rest of it was still in the motor casing! Talk about bad luck! Luckily for me, after removing the rear mounting spacer, the broken part was sticking out about 3mm and I was able to use needle nose plyers to twist it out. Now I have the job of replacing it...

It's metric M6 and roughly 8 cm long.

Anyone know where I might get replacements? Besides online? Lowe's doesn't carry metric all threads, neither does O'Reilly Auto Parts. I'll try Fastenels Monday.

I pulled all mounting bolts. I noticed one of the shorter front bolts was a bit bent, so I'll replace it as well. What do you folks thing about thread locking on those mounting bolts? Will it withstand the heat, or is it not a good idea in the first place?

misteright1_99 · #2 (**permalink**) 06-21-2008, 08:49 PM

You can buy long bolts and cut off the heads, if you can find them threaded the length of the bolt. If you cant find them I have heard a company online called Mcmaster Carr.

cityevader · #3 (**permalink**) 06-22-2008, 01:19 AM

Same thing happened to me!
Drill it just a hair bigger and tap it to 1/4x20 thread, found ANYWHERE! Actually, you may not even need to drill it, but I haven't looked at any chart to see what drill size needed for 1/4" threads...but it's so close, you can probably just run the tap right in. Mine was a hair off-sized due to having to drill out the broken stud, which partially mauled the original threads.

**fairracing31** · #4 (**permalink**) 06-22-2008, 02:44 AM

I have alway's been able to find all the bolt's, nut's, threaded rod at ACE hardware....Some say they don't have it....

Maybe every ACE is different

Mopedamauter79 · #5 (**permalink**) 06-22-2008, 04:50 AM

Quote:

Originally Posted by MrLarkins

Well, crap.

I waited 1 week to get replacement gaskets in the mail. I received them today, put them on, and took the bike for a spin. Now it ran smooth as ever, until...

IT SNAPPED RIGHT OFF!

At first, I thought it just wiggled loose and fell out, so I drove around looking for it and I got lucky and found the bolt/nut part. That's when I noticed it wasn't complete. The rest of it was still in the motor casing! Talk about bad luck! Luckily for me, after removing the rear mounting spacer, the broken part was sticking out about 3mm and I was able to use needle nose plyers to twist it out. Now I have the job of replacing it...

It's metric M6 and roughly 8 cm long.

Anyone know where I might get replacements? Besides online? Lowe's doesn't carry metric all threads, neither does O'Reilly Auto Parts. I'll try Fastenels Monday.

I pulled all mounting bolts. I noticed one of the shorter front bolts was a bit bent, so I'll replace it as well. What do you folks thing about thread locking on those mounting bolts? Will it withstand the heat, or is it not a good idea in the first place?

Needle nose pliers, I knew this would work if I had enough slack on the outside, sad thing is... I dont... grr.

-Mopedamater79's gf

**Bikeguy Joe** · #6 (**permalink**) 06-22-2008, 08:11 AM

Locking pliers can be used if there is even a little of the stud sticking out...if you can file a flat side on it, all the better.

Why can't you just use the correct length metric bolts instead of allthread? Bolts would be stronger anyhow.

**Bikeguy Joe** · #7 (**permalink**) 06-22-2008, 08:12 AM

You can find metric bolts just about anywhere that sells hardware, and really cheap at any auto parts store.

MrLarkins · #8 (**permalink**) 06-22-2008, 08:16 AM

some say using metrics bolts would cause damage to the block threads with all the in and out mounting and remounting that might happen. I'll try ACE

**Bikeguy Joe** · #9 (**permalink**) 06-22-2008, 08:21 AM

If you use loctite and don't over tighten them, they will be fine. How many times are you planning on removing the bicycle motor from the frame?

In my experience, it's the stud that strips out, not the hole in the engine case. If the engine case strips, you can use a heli-coil, or even easier is a product made by Loctite that is a thread re-builder. I used it in the primary case on a chain tensioner bolt in my old Sportster and it held for years.

cityevader · #10 (**permalink**) 06-22-2008, 11:23 AM

Quote:

Originally Posted by fairracing31

I have alway's been able to find all the bolt's, nut's, threaded rod at ACE hardware....Some say they don't have it....

Maybe every ACE is different

I've got three Aces witin 10 miles, none carry metric