This is why you do pre ride inspections

Pathfinders · 02-14-2019, 12:18 PM

I had the day off and it is going to be 60 here today. Was going thru a pre ride inspection and noticed a loose nut on the swingarm bolt. I tightened the nut a few turns and the bolt started turning. Look at the other end of the bolt and the head had sheared off. The nut was not loose the bolt was working its way out.

Any idea on the bolt size? I would like to get a grade 8 or hardened bolt to replace it. I do not know how much of the bolt went with the head.

Roy

**JerryHawk250** · 02-14-2019, 01:37 PM

It's a 14mm diameter bolt. Not sure of the exact length. I think it's around 275mm long. Just measure the overall width of the swing arm assembly.

Pathfinders · 02-14-2019, 03:23 PM

Thanks Jerry.

wheel spinner · 02-14-2019, 04:13 PM

Man you are lucky that you did the per-inspection and caught it... that really could have turned out to be a very bad situation for you... All I got to say is you have an angel in your corner...

And far as the bolt, make sure you take the nut with you so you can make sure it screws on... it really wouldn't hurt to buy a new nut... if the head of the bolt was sheared off flush with the swing arm.. chances are you can compare the bolts together for size less of the head on the new one...

Megadan · 02-14-2019, 10:34 PM

Another, and IMHO a better option than simply a bolt is an actual shaft assembly with a nut and washer on each side. The TT250 comes with such a thing, and does work on the Hawk. Parts 4, 6, and 7. https://store.cscmotorcycles.com/TT2...RBER-s/353.htm

This design takes all torsional preloading off of the bolt and instead allows it to act as a stud. This makes it less prone to fatigue and failure due to axial loads.

Pathfinders · 02-15-2019, 07:58 AM

Thanks for the link Dan. Parts ordered today.

Roy

02-14-2019, 12:18 PM	#1
Pathfinders Join Date: Nov 2017 Location: Upstate SC Posts: 129	This is why you do pre ride inspections I had the day off and it is going to be 60 here today. Was going thru a pre ride inspection and noticed a loose nut on the swingarm bolt. I tightened the nut a few turns and the bolt started turning. Look at the other end of the bolt and the head had sheared off. The nut was not loose the bolt was working its way out. Any idea on the bolt size? I would like to get a grade 8 or hardened bolt to replace it. I do not know how much of the bolt went with the head. Roy
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02-14-2019, 01:37 PM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	It's a 14mm diameter bolt. Not sure of the exact length. I think it's around 275mm long. Just measure the overall width of the swing arm assembly. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel Last edited by JerryHawk250; 02-14-2019 at 03:26 PM.
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02-14-2019, 04:13 PM	#4
wheel spinner Join Date: Nov 2017 Location: Suffolk Va. Posts: 146	Man you are lucky that you did the per-inspection and caught it... that really could have turned out to be a very bad situation for you... All I got to say is you have an angel in your corner... And far as the bolt, make sure you take the nut with you so you can make sure it screws on... it really wouldn't hurt to buy a new nut... if the head of the bolt was sheared off flush with the swing arm.. chances are you can compare the bolts together for size less of the head on the new one... __________________ 2006 Roketa DB-07-200 Dual Sport 2007 Monte Carlo SS 5.3 2010 Challenger Hemi 5.7 2004 Isuzu Rodeo 1998 Kia Sportage 4x4 2004 Toyota Tundra 2016 Ford Escape Guitars 1970 Gibson SG mint Condition 2005 Epiphone white Custom SG Les Paul L/New Fender Banjo New Condition BC Rich Bitch - Like New\ 3 Jay Turser SG Good Condition Amps Marshall vs100 Good Condition Acoustic 261 very good condition Boss GT-6 Pedal effects Like New
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02-14-2019, 10:34 PM	#5
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,034	Another, and IMHO a better option than simply a bolt is an actual shaft assembly with a nut and washer on each side. The TT250 comes with such a thing, and does work on the Hawk. Parts 4, 6, and 7. https://store.cscmotorcycles.com/TT2...RBER-s/353.htm This design takes all torsional preloading off of the bolt and instead allows it to act as a stud. This makes it less prone to fatigue and failure due to axial loads. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
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02-14-2019, 03:23 PM	#3
Pathfinders Join Date: Nov 2017 Location: Upstate SC Posts: 129	Thanks Jerry.
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02-15-2019, 07:58 AM	#6
Pathfinders Join Date: Nov 2017 Location: Upstate SC Posts: 129	Thanks for the link Dan. Parts ordered today. Roy
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