Motor Mount Bolts

[ChrisK]

Is it normal for the rear motor mount bolts on my 98 M900 to not have a nut like the forward one does? The end of mine has a bit of rust on it so it kind of looks like it could have sheared off at one point, but I'm also not seeing any bolts on ebay that are designated for a M900 that are the same length and both have nuts. I do see a lot of other models whose bolts appear to be the same length and both have nuts.

If that's normal, does anyone know if there's a bolt from a different model that I could swap in that would be slightly longer?

If it's not normal, does anyone happen to have a replacement lying around?

[ducpainter]

On my 96 the left hand side has an allen head and the right side threads into the frame...no nut.

[ChrisK]

Alright, that's kind of what I figured.

Anyone know of a bolt from a different model that would work in my frame and have a little bit more thread pop through on the other side?

The motivation behind this is to attempt to build a center-lift paddock-style stand.

[ChrisK]

Also, does anyone happen to know what the thread dimensions are for that bolt?

[Speeddog]

AFAIK OEM bolt is a 10x1.25.

Frame sliders usually come with a longer stud, threaded both ends for the 'nuts' they use.

Caveat.... frame slider stud is not necessarily 10x1.25.

[ChrisK]

Any idea if just the longer stud can be purchased? I have zero experience with frame sliders.

[oldndumb]

Any idea if just the longer stud can be purchased? I have zero experience with frame sliders.

I have bought a lot of hardware from http://mdmetric.com.

There are other sources on the interweb but I find their reference material and design standards very educational and useful. Case in point, read the stud standards and you will see that they are measured differently than SAE, in addition to the obvious inches vs Mm difference. When in doubt, I give them a call and they have always been responsive even though my orders are relatively small.

[ChrisK]

I'm still stuck on this and need some help.

There aren't enough threads sticking through on the right side to make this work with the current bolt I have.

I haven't really been able to figure out the site posted above, I guess I should just call them. McMaster-Carr doesn't have a bolt long enough.

Does anyone know if a bolt from a different model would work? For example, M695 bolts have nuts on the other side of them. Does anyone else think this might mean they're a little bit longer than what I have? Anyone know if they're also M10x1.25?

[ducpainter]

I believe a 695 will have 12mm bolts.

[ChrisK]

I believe a 695 will have 12mm bolts.

Dang, I think you're right.

Does anyone have one that they can measure the length of? I have access to a lathe that I could use to turn the 12mm down to 10, then re-thread the end... IF the bolt is longer than my current one.

[ducpainter]

I'll probably get flamed for suggesting this, not that I give a rat's ass, but what about 10mm threaded rod?

[Speeddog]

Have you actually verified that the rear bolt is bad?
Early frames did have a threaded fitting in the frame.

That said, a 10mm front motor mount bolt off of of a '00 M900 is 251mm long, with ~20mm of thread.

[ducpainter]

Have you actually verified that the rear bolt is bad?
Early frames did have a threaded fitting in the frame.

That said, a 10mm front motor mount bolt off of of a '00 M900 is 251mm long, with ~20mm of thread.

The bolt isn't bad...he wants to attach something on either side so he can use a lift apparatus of some sort so he needs more length.

[Speeddog]

The bolt isn't bad...he wants to attach something on either side so he can use a lift apparatus of some sort so he needs more length.

Ah, OK.

Nichols motor mount bolts might be long enough.
And they'd be likely to tell you how long they are if you ask 'em.

[ChrisK]

Yeah I'm trying to build a center-lift stand based of the motomfg or bursig lifts. I'm building it on the right side rather than the left like there's. So all I need is a bolt just like I have, plus about a half inch of extra thread.

I agree, DP, threaded rid could technically work, but it's my last resort. Also, usually the term Nichols is associated with pricey, in my head. If like to keep costs down as much as possible.