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Long case guards bolt size

1

1948man

Forum Sage
Past Site Supporter
So I got these
http://www.denniskirk.com/jsp/produ...0WTISM4VMDK0OWIV0?store=Main&skuId=50555&mmy=

They sent 2 long bolts to replace the original ones that were 1/2" longer so there would be room for the nut after adding the thickness of the case guards on each side.

Problem is the original bolts were 7/16" (or nearest metric) and the new bolts are 3/8". I'm thinking using these bolts of lesser diameter is not a good idea. any opinions.
Also, if I need to get longer 7/16 bolts, is there a grade I need and any ideas of a source? Maybe Fastenal?

Boy, the bolts are no picnic to get in and out. I tried using minimal pressure from a jack and piece of wood on the bottom of the engine but It seems to want to pick up everything and doesn't really change the position of the engine hole relative to the frame hole.
1983 GS 1100GL
 
If the bolt hole doesn't line up properly, you might want to try loosening the other engine bolts first. A bottle jack under the engine will help support everything. When installing the engine into the frame on a recent project I noticed that there was a sweet spot where everything lined up nice and straight which is what you want I think.

Regarding the bolt, I think you need grade 5 SAE of 8.8 metric. Good luck finding bolts that long without special ordering.
 
If you have a Fastenal store I would look there for those bolts because most hardware stores won't have any that long.
 
Well, at least I got the original bolt back in for now. Parts fiche says 12x235. Any opinions as to maybe just using the slightly smaller diameter bolts supplied with the MC Enterprises case guards. Everything seems so "bound up" anyway. Also, If I find bolts locally, how important is the grade. The original stock bolt has something that resembles a 7 on the head
 
1948man said:
Problem is the original bolts were 7/16" (or nearest metric) and the new bolts are 3/8".
Click to expand...

To me the size difference between 7/16 and 3/8 wouldn't cause a concern. You should be fine with those.

EDIT: I guess i better add unless they wont thread into a hole or something. Im not sure where they go, so i'll shut up now.
 
Last edited:
I'm tending to agree with you Tim. After all, my model is listed at Dennis Kirk as one being fit by these guards. Also searching the net and calling around locally leads me to believe it's gonna be really hard to find these 10" long. Anybody else have any opinions?
 
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