repairing bent rearset mount

cbzdel · March 22nd, 2013, 11:15 AM

I had a bit of a low speed high side on my bike last evening, actually it was on my Ninja 300, but I am sure you 250R guys have ran into the same issue.

How do I go about fixing this, the mounting point in the frame is bent, do I just beat on the rearset until the mount bends back into place?

What do I do in this case? A new frame alone is $1500.. I would rather insurance NOT total out my bike with all the work, money and time I have into it.. This area is about 90% of the damage to the bike, as it landed on top of me, and did not slide..

(obviously I will need new rearsets but, I am talking about where the rearset mounts to the bike is bent as well.)

Alex · March 22nd, 2013, 11:19 AM

Howdy! Should I move this into the 300 tech area? (generally the most helpful folks here see new posts wherever they are). I wonder if you should update your profile as well to show the new 300.

cbzdel · March 22nd, 2013, 11:22 AM

You can move it you would like, I didnt post it there only because I figure the 250R guys would have a better idea as they have been around longer.. The mounting points are exactly the same.

tooblekain · March 22nd, 2013, 11:47 AM

Is the frame made out of steel? I would say heat it up with a torch and use vise grips and bend it back.

cbzdel · March 22nd, 2013, 11:50 AM

I have one of those small propane bottle torches would that heat it up enough?

tooblekain · March 22nd, 2013, 11:54 AM

Quote:

Originally Posted by cbzdel

I have one of those small propane bottle torches would that heat it up enough?

Pic of torch?

I would think its good enough. IIRC the NInja 250 and 300 frame is steel, so you can bend it back easily. Using heat makes it a lot easier to bend back.

If the frame is aluminum, I would take it to a shop to have them bend it back.

Trailerboy531 · March 22nd, 2013, 11:58 AM

At the track with our 250s we just slide a pipe over the foot peg and muscle that f*cker back to where it should be. Don't even use heat.

cbzdel · March 22nd, 2013, 11:58 AM

Its one of these..

According to Kawi specs the frame is:

Quote:

Semi-double cradle, high-tensile steel

Motofool · March 22nd, 2013, 12:16 PM

If you bent it without using heat, you can reshape it back using only force.

Do not use the rearset as a lever; rather, remove it first.

Then use a friend and a big crescent wrench clamped over the flat piece to which the rearset is normally bolted.

The area around the holes for the bolt is solid, farther from those it is hollow; you want the wrench applying force over the holes.

With your friend holding the bike, bend the part back to original shape.

You may need to remove the swingarm to clear the wrench for reaching all the way in.

The attached schematic shows how to straighten the support for the passenger rearset, but the same principle applies to your case.

Skyfox16 · April 8th, 2013, 06:29 PM

Has anyone tried bending this piece back like the above post describes? I recently low sided and bent the same part, just not as bad.

Are you suppose to put the wrench in between the two mounting holes? Once you put the wrench on that piece to bend it, is just using your hands enough force to bend it back or do you need to use a hammer or something to tap the wrench with?

Klondike1020 · April 14th, 2013, 08:12 PM

Use a large wrench and maybe a pipe for leverage. Don't heat it cause that can mess up the temper of the steel. I would try to position the wrench where the holes are so you return it to shape from the attachment points

phrenetiK · April 15th, 2013, 06:27 PM

Quote:

Originally Posted by Skyfox16

Has anyone tried bending this piece back like the above post describes? I recently low sided and bent the same part, just not as bad.

Are you suppose to put the wrench in between the two mounting holes? Once you put the wrench on that piece to bend it, is just using your hands enough force to bend it back or do you need to use a hammer or something to tap the wrench with?

i did the exact same thing. i used a metal pipe to bend it back straight. mine was touching the chain guard and is now back straight. been a week and no issues.

CZroe · April 17th, 2013, 08:24 PM

I detected that mine were ever so slightly bent when I installed rearset adjusters and a rear hugger.

To solve it, I removed the footrest bracket and inserted extremely short bolts into the holes. I then took two of the largest adjustable wrenches I had and clamped them over the bolts length-wise (top of head to base of shaft). I levered them out using my own weight with a few small tugs instead of trying to brute-force bend it and it seemed to do the trick without putting too much force into anything other than what had already received force.

Old Lemon · April 18th, 2013, 01:19 PM

Quote:

Originally Posted by CZroe

(top of head to base of shaft)

CZroe · April 18th, 2013, 03:03 PM

Durr hurr hurr.

March 22nd, 2013, 11:15 AM	#1
cbzdel ninjette.org member Name: Chris Location: Tacoma, WA Join Date: Sep 2012 Motorcycle(s): 2009 Ninja 250/2013 Ninja 300 Posts: 52	repairing bent rearset mount I had a bit of a low speed high side on my bike last evening, actually it was on my Ninja 300, but I am sure you 250R guys have ran into the same issue. How do I go about fixing this, the mounting point in the frame is bent, do I just beat on the rearset until the mount bends back into place? What do I do in this case? A new frame alone is $1500.. I would rather insurance NOT total out my bike with all the work, money and time I have into it.. This area is about 90% of the damage to the bike, as it landed on top of me, and did not slide.. (obviously I will need new rearsets but, I am talking about where the rearset mounts to the bike is bent as well.)

March 22nd, 2013, 11:19 AM	#2
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	Howdy! Should I move this into the 300 tech area? (generally the most helpful folks here see new posts wherever they are). I wonder if you should update your profile as well to show the new 300. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

March 22nd, 2013, 11:47 AM	#4
tooblekain ninjette.org sage Name: Matt Location: San Diego, CA Join Date: May 2012 Motorcycle(s): 2007 Triumph Bonneville; 2008 Ninja 250r (trackbike) Posts: 748	Is the frame made out of steel? I would say heat it up with a torch and use vise grips and bend it back. __________________________________________________ CVMA #312SoCal TrackdaysBigHeadz RacingMotion ProFactory EffexLeatt Brace* Racetech Bell Woodcraft CFMVortexHotbodiesSurface Sun SystemsBrakingLiveWire EnergyFreegun Underwear

March 22nd, 2013, 11:58 AM	#7
Trailerboy531 Gear crash test dummy Name: Max Location: South Bay (So. Cal) Join Date: May 2011 Motorcycle(s): 2010 Ninja 250 race bike, 2014 ZX-636r Posts: A lot.	At the track with our 250s we just slide a pipe over the foot peg and muscle that f*cker back to where it should be. Don't even use heat. __________________________________________________ CVMA #531

April 8th, 2013, 06:29 PM	#10
Skyfox16 ninjette.org member Name: Rick Location: Ohio Join Date: Jun 2012 Motorcycle(s): 250r Posts: 17	Has anyone tried bending this piece back like the above post describes? I recently low sided and bent the same part, just not as bad. Are you suppose to put the wrench in between the two mounting holes? Once you put the wrench on that piece to bend it, is just using your hands enough force to bend it back or do you need to use a hammer or something to tap the wrench with? __________________________________________________ 08 250R - White

March 22nd, 2013, 11:22 AM	#3
cbzdel ninjette.org member Name: Chris Location: Tacoma, WA Join Date: Sep 2012 Motorcycle(s): 2009 Ninja 250/2013 Ninja 300 Posts: 52	You can move it you would like, I didnt post it there only because I figure the 250R guys would have a better idea as they have been around longer.. The mounting points are exactly the same.

March 22nd, 2013, 11:50 AM	#5
cbzdel ninjette.org member Name: Chris Location: Tacoma, WA Join Date: Sep 2012 Motorcycle(s): 2009 Ninja 250/2013 Ninja 300 Posts: 52	I have one of those small propane bottle torches would that heat it up enough?

April 14th, 2013, 08:12 PM	#11
Klondike1020 Intrepid Adventurer Name: Josh Location: Rochester/Buffalo NY Join Date: Jan 2012 Motorcycle(s): 2004 GSXR 750 , 71 cb350streettracker, 07 Polaris Predator 500 Posts: A lot.	Use a large wrench and maybe a pipe for leverage. Don't heat it cause that can mess up the temper of the steel. I would try to position the wrench where the holes are so you return it to shape from the attachment points

April 17th, 2013, 08:24 PM	#13
CZroe CPT Falcon Name: J.Emmett Turner Location: Newnan, GA Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.	I detected that mine were ever so slightly bent when I installed rearset adjusters and a rear hugger. To solve it, I removed the footrest bracket and inserted extremely short bolts into the holes. I then took two of the largest adjustable wrenches I had and clamped them over the bolts length-wise (top of head to base of shaft). I levered them out using my own weight with a few small tugs instead of trying to brute-force bend it and it seemed to do the trick without putting too much force into anything other than what had already received force.

April 18th, 2013, 03:03 PM	#15
CZroe CPT Falcon Name: J.Emmett Turner Location: Newnan, GA Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.	Durr hurr hurr.

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