YSS Shock Absorbers - Warning - Danger to Life

[krbkk]

YSS shock absorbers for Harley Davidson Softail, HD part no. 54508-00, YSS part no. RT306-220T-02
have a design or manufacturing defect.
The connection between the shock absorber and the mounting point is too weak.
After only 10,000 km, the eyelet is so bent that the high-strength threaded bolt is breaking off, or at risk of breaking off.
If the second bolt also breaks after just a few km, an accident is inevitable, and could even be fatal.
If you have installed such a YSS shock absorber, check it and replace it with a different brand if necessary.

[gargamon]

How much do you weigh? 

[SLOWHAND225]

So you have a broken mounting bolt ?
The shock wasn't bent until the bolt broke.

However, I'd reach out to them and let them know. They may be seeing a pattern.

[Hummin]

Where you bought it, and who installed it? 

 

Sounds fishy, and you sure it was installed correctly and with original parts?

 

Have you checked if there is a  common problem?

[piston broke]

gawd, who the heck drives Harley's ?

 

The only bloke i know who likes them is Poppa Al - That's good enough for me ...

[VocalNeal]

7 hours ago, gargamon said:

How much do you weigh? 

 

How much does the bike weigh?

 

 

[VocalNeal]

7 hours ago, krbkk said:

the high-strength threaded bolt is breaking off, or at risk of breaking off.

How do we know the bolt is high-strength and what does that mean? 

Maybe the bolt is a stock Harley bolt it probably, certainly isn't a YSS bolt.

 

[papa al]

9 hours ago, piston broke said:

gawd, who the heck drives Harley's ?

 

The only bloke i know who likes them is Poppa Al - That's good enough for me ...

reet

harvey-dilbertson be da most bestest ever

[Ralf001]

You broke a bolt and thought the best action was to slander the company....

 

Good luck with that !

[gargamon]

8 hours ago, VocalNeal said:

15 hours ago, gargamon said:

How much do you weigh? 

 

How much does the bike weigh?

Just saying...

[DualSportBiker]

On 6/3/2025 at 6:08 AM, Ralf001 said:

You broke a bolt and thought the best action was to slander the company....

 

Good luck with that !

The owner of YSS is highly litigious as well...

[action]

May want to do some research on the defamation laws in Thailand and reconsider your post.   

[1duckyboy]

If the bolt was tightened with an impact wrench set at the  wrong torque the bolt could have been damaged or broken then.

[kickstart]

YSS shocks on a Harly, all the YSS shocks I see are all on Waves etc. are they meant for Haleys?  you spend X00000 baht on a motorbike but put on Thai made shock absorbers, why not get the proper ones for a Harly, a Thai dealer should Have them, or can get them ,or order them yourself online.

[Lokie]

My first thought - who fits YSS shocks on a Harley, 2nd YSS are good quality Shocks, had em on a Forza & were Tip Top for 6500b & ladtly as said the bolt has failed nit the shock

[liddelljohn]

YSS make shocks for many types of bikes , not just little bikes  they supply shocks for  Ducati, Triumph and Harley and all big Jap bikes , they are very good quality  rebuildable after market  shocks  ..

 

The bolt for mounting the  shock is sheared off , looks that  it was not tight enough and came loose  and then flexed  causing the bend in the shock collar  and then the bolt snapped ..  , some Harley bolts are known to shear if too much torque applied .. So the shock is not the problem its probably down to incorrect mounting ....