Engine mounting bolts strength grade?

Domagoj · August 29th, 2012, 08:03 AM

After valve adjustment I noticed that the replacement bolt I used with Shogun frame sliders (front engine mounting bolt) is bent. I removed the sliders and returned the stock bolt for now.

Has anyone experienced similar problems? My replacement bolt had no strength grade and I don't want to replace it with another one with no strength guarantee. I have not found any strength grading on stock bolt, but it looks very solid. I'd like to find something similar. Any ideas about strength of the stock bolts?

cuong-nutz · August 29th, 2012, 09:16 AM

My guess would be Grade 8 Hardware or 10.9? metric equivalent.

Racer x · August 29th, 2012, 09:42 AM

Grade 8

Domagoj · August 29th, 2012, 12:16 PM

Grade 8 is a really strong bolt. It's going to be really hard to get that, even 8.8 is hard to find here, and it's almost impossible to work on. I'll figure something out I guess.

Thanks!

Edit: If anyone has any idea where to get 10.9 M10 that long online please let me know.

Racer x · August 29th, 2012, 12:26 PM

If you are talking About the four bolts that hold the
frount to the frame. There is very little stress there.

Domagoj · August 29th, 2012, 02:27 PM

Quote:

Originally Posted by Racer x

If you are talking About the four bolts that hold the
frount to the frame. There is very little stress there.

I'm talking about the bolt that holds the engine with the pieces you mentioned. One of three bolts that keep the engine in place.

CThunder-blue · August 29th, 2012, 02:31 PM

Quote:

Originally Posted by Racer x

If you are talking About the four bolts that hold the
frount to the frame. There is very little stress there.

He's talking about the upper front bolt that the sliders bolt into. It's a super long bolt that slides through the frame from one end, through the engine case, and back out the other side of the frame.

When I first bought my bike, it had a frame slider that had a pretty nice long bolt. When I got the shogun kit, I noticed the bolt looked pretty weak so I reused the bolt from the old kit.

If you know the length of the bolt, you can try finding it on http://www.fastenal.com/web/search/p...%20Screws%22|~

k-os · August 29th, 2012, 02:39 PM

You may end up needing to get some threaded rod and have a nut welded onto one end to make your own "bolt". Any idea how long it would need to be? I've gotten two frame slider kits for my Hawk 650's that have had the bolt made this way.

Domagoj · September 12th, 2012, 12:56 AM

Quote:

Originally Posted by k-os

You may end up needing to get some threaded rod and have a nut welded onto one end to make your own "bolt". Any idea how long it would need to be? I've gotten two frame slider kits for my Hawk 650's that have had the bolt made this way.

Front mounting bolt should be approx 245 mm and rear 160 mm, for shogun sliders. 30mm of thread should be more than enough.

I'm sorry I haven't seen your post earlier

I have made my bolt, but it was of low quality steel and I noticed that the bolt was bent after dissasembly. That's why I asked about bolt grade.

August 29th, 2012, 08:03 AM	#1
Domagoj ninjette.org guru Name: Domagoj Location: Rijeka, Croatia Join Date: Aug 2010 Motorcycle(s): Ninja 250r 2009 Posts: 396	Engine mounting bolts strength grade? After valve adjustment I noticed that the replacement bolt I used with Shogun frame sliders (front engine mounting bolt) is bent. I removed the sliders and returned the stock bolt for now. Has anyone experienced similar problems? My replacement bolt had no strength grade and I don't want to replace it with another one with no strength guarantee. I have not found any strength grading on stock bolt, but it looks very solid. I'd like to find something similar. Any ideas about strength of the stock bolts?

August 29th, 2012, 09:16 AM	#2
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	My guess would be Grade 8 Hardware or 10.9? metric equivalent. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days

August 29th, 2012, 09:42 AM	#3
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	Grade 8 __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

August 29th, 2012, 12:26 PM	#5
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	If you are talking About the four bolts that hold the frount to the frame. There is very little stress there. __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

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August 29th, 2012, 12:16 PM	#4
Domagoj ninjette.org guru Name: Domagoj Location: Rijeka, Croatia Join Date: Aug 2010 Motorcycle(s): Ninja 250r 2009 Posts: 396	Grade 8 is a really strong bolt. It's going to be really hard to get that, even 8.8 is hard to find here, and it's almost impossible to work on. I'll figure something out I guess. Thanks! Edit: If anyone has any idea where to get 10.9 M10 that long online please let me know.

August 29th, 2012, 02:39 PM	#8
k-os ninjette.org sage Name: Andy Location: Sheboygan, WI Join Date: Dec 2008 Motorcycle(s): 1988 Honda Hawk NT650, 1989 Honda Hawk NT650, 1997 GSXR750 Track Bike Posts: 890	You may end up needing to get some threaded rod and have a nut welded onto one end to make your own "bolt". Any idea how long it would need to be? I've gotten two frame slider kits for my Hawk 650's that have had the bolt made this way.