need help with engine bolts

[mreric]

I got the Mmoto engine guard, but i notice that the bolts they send are too short even compared to stock.


Engine guard, crash bars for DCT for Honda NC700X

can anyone help me locate longer bolts ASAP!!

https://www.boltdepot.com/Metric_hex_bolts_Zinc_plated_class_8.8_steel_12mm_x_1.25mm.aspx

^ will this work??

i need a M12x80 or M12x85 any of those two sizes will work for this project.

can anyone help me?

thanks!!!

 

[Beemerphile]

M12x80x1.25 is fairly easy to find. For the 85mm, you might have to install a slightly longer bolt with an extra washer. Works fine so long as there is enough threaded length to not bottom the threads...

1 M12 1 25 x 90mm JIS Hex Head Flange Bolt Small Head Class 10 9 Zinc | eBay

 

[mreric]

M12x80x1.25 is fairly easy to find. For the 85mm, you might have to install a slightly longer bolt with an extra washer. Works fine so long as there is enough threaded length to not bottom the threads...

1 M12 1 25 x 90mm JIS Hex Head Flange Bolt Small Head Class 10 9 Zinc | eBay

thank you.

but what is a JIS hex head? is that what i need? will it work with my sockets that i have?

 

[Beemerphile]

thank you.

but what is a JIS hex head? is that what i need? will it work with my sockets that i have?

JIS is the Japanese Industry Standard. The original bolts are JIS (B1189) as well. There is no problem using your normal metric tools. A JIS flange bolt may take a different size socket (smaller) than a standard metric or a DIN spec bolt. But once you find the right socket it will work. As a washer head bolt, the one I reference would not need a washer, except as I pointed out if it was necessary in order to take up extra depth. I would try the 90mm first without a washer to see if there was sufficient threaded length for it to work without bottoming out the threads. The mounting bosses in the block are tapped through, and there is no problem with a longer bolt extended past the block so long as there is a thread or two on the inside. If the threads bottom out, add a washer. If not, you are good to go.

EDITED TO ADD: An interesting bit of trivia is that the reason most German bikes have a 13mm wrench (and no 14mm) in the tool kit and most Japanese bikes have 14mm wrench (and no 13mm) is because of the differences between the DIN and JIC standards.

 

[TigerDude]

BP is understating his knowledge of the topic.

http://nc700-forum.com/forum/nc700-mods/414-givi-engine-bars.html

 

[Beemerphile]

BP is understating his knowledge of the topic.

http://nc700-forum.com/forum/nc700-mods/414-givi-engine-bars.html

Well, as often as I get accused of overstating it, maybe this provides a little balance.