Sometimes you think you're doing what's best for your bike by taking it to a trusted mechanic. But this is where you realize that if something is done by a person, there is always room for human error. This beautiful bike came in from out of town, before it is placed on the Dyno, everything was inspected!!! Unfortunately, the chain seem secure, but it was not. Something we did not realize until after moving it over 100 mph! Everyone in this video is OK and fortunately it happened in a secure location instead of on the streets!

A 6ft plus chain and no guard lucky no one got killed god bless

Sometimes you think you had bad luck, but to walk away says you should count your blessings .

I still have scars on my ankle from when a #35 chain on a 3hp Briggs and Stratton powered minibike threw a chain back in 1972.

That bike needs to be on a neighborhood watch list

What luck for that to happen on the dyno, on the street at 100+ could of been fatal, so glad your ok.🙏

I can’t get the song ‘Whip it good’ outta my HEAD ! 😎

That's why you should have a chain guard fitted. Not only save your leg but prevents damage like this.

That’s what a Diddy after party feels like 🤣

It's almost like a final destination. Luckily everyone is safe

Once I was doing 160kmph on my ZX6R and suddenly lost acceleration. The chain broke, cracked the rear fenders and flew right into the air. After realizing what happened, and what could have happened, I felt so lucky and relieved. Fortunately I was riding in a group.

And that's why you get a 530 chain that's rated for bikes over 150hp, and that clearly puts out at least 200hp. So chain ratings are kinda important.

That’s exactly why I still keep the chain guard on my Huffy.

Glad everyone was okay! That chain slicing through someone or something at 100+ could have been nasty.

THANK GOD all is OK and the Rider was not injured WORSE THAN it looked like he was.

Had a chain snap on a racing cart I was tuning once and it missed my head by less than a inch, realized immediately that it probably would have been the last thing I heard before my skull was ripped apart and everything scrambled. Glad that everyone recovered but I must admit it left a bit of a mark that can creep back in at times questioning the amount of confidence in the workmanship as well as parts structural integrity. Remember guys, Have fun and always Be Safe

Out of all the things that can go wrong running 100mph all while sitting still this happens, it's truly amazing

Kudos to captain almost no eyes right behind the action.

Bro got whiplash but took ot like a champ

Seen it happen many times needs to be better chain guard protection Don’t take anything for granted on a bike

🎶Don't fool yourself girl, it's going right up the poop shot🎶😂

Back in the day our racing karts run engines with a rotary valve intake, meaning the carb was on the side instead of the front unlike the reed intake. One time the chain broke off and cut the carb's neck clean, I found the carb hanging on the side from the fuel line and throttle cable. I'm just happy the chain guard is there doing it's job, it's an important one, it's not just for picking up the grime.

You know the manufacturer fits a chain guard for a reason and its not just there for cosmetic appearance

Something jumped up and bit me 😂

That dude bent over watching was the luckiest guy in that room

Chain snapped 😢😢hope everyone's OK

If he ever goes to prison, they'll be able to walk right in. Poor bastard.

Broken chain is one of my biggest fears. Long live the direct drive.

Exactly why you NEVER stand behind a dyno!

Always thought that dinoing your car or motorcycle only tears it up, This video proves me right, I say as long as you're riding or driving faster than you can walk there's no reason to prove nothing,

Is a legitimately one of my worst fears

bro so many people dont lube/care for their chain that I see out there riding street bikes. drives me nuts

Left leg was definitely protected by an angel...Damn close !!

Yup! Chains can snap. I bet it was fitted with a quick link 🤔

[as per the preemptive statement] DAMN!! Lucky as hell something like this didn’t happen on the road with a speed test!

Been there, got slapped in the leg. Very painful experience. Got a much more stout chain after.

You're probably gonna need a couple repair links on that chain. You can pick them up at Tractor Supply, same place you got the chain. The rest should buff out.

His butt wobbled more than the bike. 😂

Bro felt what his forefathers went through with that whipping and immediately said 'nope' ☠️🤣🤣

You have to be extra careful when dealing with ALOT OF POWER

Dont just trust the customer when he or she says its all good. There is a handful of things you gotta check on the bike before it hits the dyno. Engine oil level, coolant level, chain slack and condition are some 👍 turned guys away before and they're mad but beats having something like this happen.

Damn, that's what you call a slap ass!!! 😂 I'm glad everyone is alright!

Home boy got his ass whipped by the angry bike 😂

You must have felt that? You are very lucky

You know what they say about chains They are only as strong as their weakest link

Why didnt he just have a chain guard fabricated? This shows exactly why they are important.

Took that like a champ

Had a chain come off on the exit of a corner during a road race in the late 80s. I was hard on the gas when it came apart. After getting the bike back to the pits, we found the chain marks all the way down the bottom of the tail section/seat support. One inch to the left and it would have taken out the back of my leg.

Damn that could have been really bad that's so freaking scary dude...

That brings me back to 5th grade that teacher hit so hard with that paddle

This is why buying good quality chains and doing regular chain maintenance is so important. I know guys that have lost legs and guys that have had bad crashes due to chain failures. P.S NEVER run a clip-on chain on a sport bike.

These tuners need to chill I’ve seen them blow heads off bikes and blame the customer it’s wild

Yeah l saw the chain come off. Definitely want to get the bestband keep that chain wax/ lube always. Some people dont take care of it like they should....and sometimes brandnew chain links break.

Safety glasses are always a good idea.

Thank god ,the guy nearby didnt loose his eye!👀

That’s a sign right there don’t take that death trap out that was your warning

The pain!!! First time in a long time I let out a loud audible gasp watching this video in a doctor's office.

He used to sing baritone, but now he's a tenor.

Ouch! Got whipped with the chain 😢😢

She said slap that, and she definitely does 😂

Should have used the rivet type on the chain instead of a master link with a snap on. Ouch that's gonna leave a mark Holmes

That’s why when I had my R1, I went and bought a drag chain Not a cheap ass chain

Poor lady hope she's OK

No room for error with the master link 😮

No chain guard is dangerous. That guy was lucky not to lose his leg.

That's why a proper chain guard is so important.

Very lucky to get off with only minor injuries here. Lesson to be learned from this is to fit a chain guard.

Suddenly, I'm in the middle of a chain react...ion !!

He thought he was in the 1700's for a second there 😂😂

It always looks like people move fast enough to avoid getting hurt until you watch it slo mo. When you could have a fatal hit before your mind even registers a problem. Scary how slow we Humans move compared to life around us.

That fart was a strong one he blew the seat apart with it! 😮

Chains have a wear limit, and also have a compound power, torque, weight, and resistance limit (Power & Torque and Work Load) strapping the wheel down on a dyno takes the traction off of the weak link list and if your primary drive is solid the chain takes over

Unbelievable! 😮 The first thing I thought was a pushrod through the engine block. This exactly looks like my lawnmower did and the whole corner piece of the block has vanished. On the other hand, thank God everyone was okay. Being a "Jill of all trades" and an RN, any exploding metal is a little grenade going off. This could have been deadly. What if it wasn't the chain and something thicker/heavier? That is why the Dyno machines at bike rallies have a taped off area with signs. Very dangerous.

Yikes, took me a few times to realize what happened.

His bike telling him to calm that shyte down

CHAIN REACTION😅😅

10 bucks says the chain was too tight. Many people don't realize that a motorcycle chain tightens as the swingarm moves upward. Extending the swingarm by 6-8 inches not only lengthens the chain but also amplifies the degree to which it stretches. Additionally, the increased swingarm length also decreases the weight required to compress the rear suspension. Add these two together and with enough torque... POP.

He put a whole new meaning to crotch rocket 😂😂😂

Well it's best to have it tested like this indoors so that the customer doesn't suddenly encounter this issue at 100mph in the middle of a long highway

I had a chain literally shatter once on me. Got me in the ass crack. Had a little 3" scab where you could very clearly see it was a chain lol. Thats chain rash. When it happened i saw the shadow of the chain in pieces then felt the fire. I was scared to inspect waiting for a pool of blood to hit my shoes. Was near the house so i went home had girl check it and luckily was just a lil rash

Talk about unsilent but still deadly! 🤷🏽‍♂️🤦🏽‍♂️

Mr. Big Shot almost became mr Short. Or mr. Law Abiding who drives inside the speed limit !

That’s one ball😢

Clip style or rivited, makes ZERO difference in this situation. The most common cause of drive chain breakage IS metal failure. The usual culprit being a simple single drop of battery acid on one side plate. It causes a change in the tensile strength or temper of the steel and the link becomes soft. A chain is only as strong as its weakest link. Hth.

I've seen a lot of crazy things happen to bikes on dynos over the years! We had a bikenight where a guy with a portable dyno came every friday, so people came from all around to see what their bikes would do. Harley's with plug in tuners, to split cranks would go there to show out. Thing is, those bikes are being pushed harder than most of em ever are on the street, so shit grenades!

Bro is grinding ranked in world height, let him cook

Had a chain break on a chainsaw once, blew apart the saw, flames and pieces everywhere. THANK GOD for my chapps (CDF, Ca. St. Fireman) although I was out for a week with "Severe Contusion" to groin.

That bish put a rip in his prison wallet for sure 😮

The Nutcracker😅😊😊😊

Damn them beans fucked me up. 😂

almost got final destinationed and that poor oldman almost had a heart attack

Don't see chains grenade very often.

Time to make a safety standard😊

Had that same thing happened at 160mph on a highway, well, the Dyno was where it was supposed to happen if it was going to.😮

Chains are very explosive when they fall apart

Reminds of Blowing up my 1974-455 H O. GranSport Buick and making it out without harm ...Me and Dad working on it in the Driveway when I was 20 years old!!! God is with you Miss😮🎉❤😢

That’s why chain guards are required at the track

I had a transmission lock up on a dyno and it broke the chain. Thankfully it took out the engine case and not my leg.

The Chain snapped 😮

Tf is that flying into the bike with the spark from tire or away? Thats shit was moving.