Cush drive is to dampen angular vibration. The chain will make more noise riding along a road without the cush drive (solid mount) than with the cush drive to the point you will hear the difference after converting from one to the other, and with that chain and sprocket wear both front and rear increases, as well as possible pitting on gear faces and wear on splines over a longer period. Assuming it is there just to absorb torque might lead some to think that any angular slack in it is ok as it still absorbs torque on take off, but not fixing it will suffer wear in the rest of the drive line unbeknownst to them. Replace the rubbers you may notice the chain drive is quieter, and as such the chain and sprockets will last longer and the bike may even feel smoother to ride. The clutch is effectively "give" in the drive line from the engine and back wheel, flip over the clutch basket on a big bike and you'll probably see radial damper springs in the base of the clutch that can take up angular load releasing the clutch. But there is a slight power loss to the cush drive so for competition like sprint karts with small engines you run a solid mount.. For off road chains and sprockets are regularly serviced, dirt is the enemy in those conditions, and chain noise is not a problem so solid mounted rear sprocket is ok and less to wear out or fail.. Cush drives emit heat due to their function, the looser they are the hotter they run and the more they wear and slacker they get. And if worn and running hotter potentially that heat and vibration could go into the sprocket carrier bearing and chain side hub bearing and cause them to loose lubricant as it thins under heat and vibration and then they fail early.
Angular is my preferred word to describe things like angular momentum, angular inertia and angular vibration, IMO best describes the direction of movement. I tend to leave torsion for describing static torque, power and general twisting stuff. But if you prefer torsional vibration that'll do.
Cush Drives appeared in Europe in the 1930's primarily on Shaft Drive but didn't feature on chain drive bikes until Jawa & CZ adopted the system in the 1950's, gradually followed by others across Europe with Japan being the last to jump onto the train in the late 1980's. Cush drive does away with specialist front and rear wheel roles so allows for a wheel to be both a front and rear item. Favoured originally by proper "built like brick outhouses" ISDT Enduro bikes (not the pretend off road Japanese trail bikes with an "Enduro" sticker or "Adventure Bikes") as it allowed for rapid removal and refitting of rear wheels with punctured tyres. It also allowed military and Enduro sidecar outfits to only require carrying a single universal spare wheel and tyre. On the plus side: Gives smoother transmission loading take up. Front and rear wheel interchangeability (Simplifies production for manufacturer). Makes for simple and easy rear wheel removal. Rear sprocket life and drive chain life increased slightly. On the down side: The rubber cushions can wear out (but are dirt cheap to replace). On cush drive systems with integral chain sprockets make of f**king hard tool steel (Jawa and CZ) replacement requires the whole cush drive unit to be replaced, when they eventually wear out after 50,000 to 60,000 miles. This can be more expensive than a conventional rear sprocket, but still cheaper than a BMW shaft cush drive unit or a single genuine Harley Davidson foot peg rubber. On some classic bikes with integral sprocket and cush drive units, where a replacement is made out of pure "Unobtainium" because the bike is so obscure that the manufacturer no longer exists or doesn't support the model anymore, the only option it to approach somebody that specialises in re-sprocketing integral cush drives (Talon Engineering in Yeovil) and have them cut off and weld a new sprocket onto the carrier. (I've had this done on a rare classic bike back in 2005). In this instance the sprocket element is referred to as a "sprocket tyre" and they laser cut the old worn "sprocket tyre" off and then weld on a replacement that they've manufactured themselves. Needless to say, despite being only half Yorkshire, I felt severely wounded in the wallet department for years afterwards. Hey, but worth it to be able to ride an exclusively rare very fast tuned high revving 4 stroke 500cc single on the road again. £71 in 2005 for just a sprocket plus the ride to Yeovil (twice) to drop it off and pick it back up again 2 weeks later.
I stand corrected though it was BMW and DKW who seemed most enthusiastic for regarding shaft drive motorcycles. Royal Enfield also invented ABS braking in 1950. I've seen pictures of the prototype..... lots of Dexion was involved. I wonder if Royal Enfield will ever reintroduce a modern version on their 1930's 1135cc V-twin (basically a Bullet and a mirrored Bullet cylinder on a common crank). I saw one at a bike rally in 2008 and it was towing a sidecar.
Looks like it would function like a dual mass flywheel that is used on many new car engines. I would guess it would prevent the idle to first gear jump, some of the old bikes can have.
Would you belive this helped me RC hobby. Looked up cush drive and this was 1st, what a UfnuQin great explanation of the Cush, also u sound as tho this bike has been in time and time again and the owner won't listen when u tell em not to do that.... And then another day u see the same UfnuQin bike at your shop door,... Wicked vid bud
Great topic Matt. I see you are using a wave rotor and I was wondering what your opinion is on using them verses a standard round type? Wear characteristics like warp, Pad wear etc. Thanks and keep the videos coming!
I didn't buy mortard wheels for my husky because I'm broke so I just bought road tires without taking into account the cush drive. I don't know what to do now.
I am looking at supermoto wheels for my drz 400s. There is an option for cush drive (adds $125) on the rear hub style. Is that part of the wheel that is like an extra thing? Or something that is already on my bike or not?
Mine lasted for 6 years before turning into a gooey mess that looked like 8 blocks of chocolate. I wonder if there's a better kind of rubber that I can use as a cush drive. :3
If you've changed your rubber cushions and the sprocket carrier won't sit fully in the wheel. (It keeps rising back up!) Any suggestions for a tighter fit?
These dampers are not be taken lightly... I got mine misplaced when installing a new tyre and this misaligned caused the rear wheel slide, the engine to lug... This put a lot of stress on chain and sprockets..... I finally got someone to take a look at this and voila, the bike now runs like butter
Mine lasted for 6 years before turning into a gooey mess that looked like 8 blocks of chocolate. I wonder if there's a better kind of rubber that I can use as a cush drive. :3
@@nuclearwinter21 i put a new rear wheel on my bike and used a green polyurathane one. made in usa. You can prob find one on ebay. The company Alloy Art makes it.
Coldfin9er Ah I should have guessed from the drums! Never listened to them but the guitars here sound quite nice. Yeah poor chuck and his fucking brain tumor. rip
As soon as the cush drive is that undersized it starts to fall apart quite quick - but then again you're a Honda bumboy so common sense doesn't apply LOL
@@thedirtyworkshop Well it is actually on a YAMAHA XTZ 660 ... :D But the 50 pounds price for new rubbers may be the best thing. Thanks for the ever great channel.
Matt I’m new to the channel but really enjoying the videos 👍🏻 have you done a vid on how the KYB sss forks work? I have them on my bike and do the oil change and seals myself just not sure how they work.
naveedaka Dirt bikes don't need them because the wheel can easily break traction on the dirt and provide a similar cush effect. There are aftermarket cush sprockets that are necessary for street legalizing big bore bikes. I learned this the hard way when I split my hub in half on my street legal WR450 aswell as broke most of the spokes, folded the sprocket in half, knotted up the chain, fucked the swingarm, and cracked the case.
Proper English it is a damper. To dampen is to add a fluid. Your bike also has a shimmy damper. I was schooled in this on Bonanza aircraft. Their shimmy damper is a POS.
Would like to share it, but most people would be offended by so many "fokins" - I don't know why some people have to say that every other word to just explain something simple.
Subbed... You had me at "fookin' hiyah!" Solid gold.
This dude is funny as fuck.
I know right! 😅
Came here to say this! Awesome teacher!
“What the F*CK is a crush drive?” Subscribed immediately
you're great at explaining stuff well in a very short time man!
Top man,you say as it is on the tin, very easy listening and to understand...this man talks my language
Cush drive is to dampen angular vibration.
The chain will make more noise riding along a road without the cush drive (solid mount) than with the cush drive to the point you will hear the difference after converting from one to the other, and with that chain and sprocket wear both front and rear increases, as well as possible pitting on gear faces and wear on splines over a longer period.
Assuming it is there just to absorb torque might lead some to think that any angular slack in it is ok as it still absorbs torque on take off, but not fixing it will suffer wear in the rest of the drive line unbeknownst to them.
Replace the rubbers you may notice the chain drive is quieter, and as such the chain and sprockets will last longer and the bike may even feel smoother to ride.
The clutch is effectively "give" in the drive line from the engine and back wheel, flip over the clutch basket on a big bike and you'll probably see radial damper springs in the base of the clutch that can take up angular load releasing the clutch.
But there is a slight power loss to the cush drive so for competition like sprint karts with small engines you run a solid mount..
For off road chains and sprockets are regularly serviced, dirt is the enemy in those conditions, and chain noise is not a problem so solid mounted rear sprocket is ok and less to wear out or fail..
Cush drives emit heat due to their function, the looser they are the hotter they run and the more they wear and slacker they get.
And if worn and running hotter potentially that heat and vibration could go into the sprocket carrier bearing and chain side hub bearing and cause them to loose lubricant as it thins under heat and vibration and then they fail early.
"angular vibration" - that's a new one on me - I'd use the term torsional vibration but each to their own.
Angular is my preferred word to describe things like angular momentum, angular inertia and angular vibration, IMO best describes the direction of movement.
I tend to leave torsion for describing static torque, power and general twisting stuff.
But if you prefer torsional vibration that'll do.
Or from Wiki - "Torsional vibration is angular vibration of an object"
Mate you know your stuff. What's your thoughts of riding a dirtbike on road that doesn't have a cushdrive?
That explains why there was a belt of melted rubber residue on my sprocket carrier when the cush drives were perished.
Cush Drives appeared in Europe in the 1930's primarily on Shaft Drive but didn't feature on chain drive bikes until Jawa & CZ adopted the system in the 1950's, gradually followed by others across Europe with Japan being the last to jump onto the train in the late 1980's.
Cush drive does away with specialist front and rear wheel roles so allows for a wheel to be both a front and rear item. Favoured originally by proper "built like brick outhouses" ISDT Enduro bikes (not the pretend off road Japanese trail bikes with an "Enduro" sticker or "Adventure Bikes") as it allowed for rapid removal and refitting of rear wheels with punctured tyres. It also allowed military and Enduro sidecar outfits to only require carrying a single universal spare wheel and tyre.
On the plus side:
Gives smoother transmission loading take up.
Front and rear wheel interchangeability (Simplifies production for manufacturer).
Makes for simple and easy rear wheel removal.
Rear sprocket life and drive chain life increased slightly.
On the down side:
The rubber cushions can wear out (but are dirt cheap to replace).
On cush drive systems with integral chain sprockets make of f**king hard tool steel (Jawa and CZ) replacement requires the whole cush drive unit to be replaced, when they eventually wear out after 50,000 to 60,000 miles. This can be more expensive than a conventional rear sprocket, but still cheaper than a BMW shaft cush drive unit or a single genuine Harley Davidson foot peg rubber.
On some classic bikes with integral sprocket and cush drive units, where a replacement is made out of pure "Unobtainium" because the bike is so obscure that the manufacturer no longer exists or doesn't support the model anymore, the only option it to approach somebody that specialises in re-sprocketing integral cush drives (Talon Engineering in Yeovil) and have them cut off and weld a new sprocket onto the carrier. (I've had this done on a rare classic bike back in 2005).
In this instance the sprocket element is referred to as a "sprocket tyre" and they laser cut the old worn "sprocket tyre" off and then weld on a replacement that they've manufactured themselves. Needless to say, despite being only half Yorkshire, I felt severely wounded in the wallet department for years afterwards. Hey, but worth it to be able to ride an exclusively rare very fast tuned high revving 4 stroke 500cc single on the road again.
£71 in 2005 for just a sprocket plus the ride to Yeovil (twice) to drop it off and pick it back up again 2 weeks later.
The cush drive was invented by Royal Enfield in 1912 for use on their 425cc V-twin.
I stand corrected though it was BMW and DKW who seemed most enthusiastic for regarding shaft drive motorcycles.
Royal Enfield also invented ABS braking in 1950. I've seen pictures of the prototype..... lots of Dexion was involved.
I wonder if Royal Enfield will ever reintroduce a modern version on their 1930's 1135cc V-twin (basically a Bullet and a mirrored Bullet cylinder on a common crank). I saw one at a bike rally in 2008 and it was towing a sidecar.
This video clearly explained to me what it is. Thanks.
I just subscribed just because you explained things like my dad does
Looks like it would function like a dual mass flywheel that is used on many new car engines.
I would guess it would prevent the idle to first gear jump, some of the old bikes can have.
"Fooking Haiyaaa" LOL. That gave me a good chuckle. Thanks for the good video!
Thank you for fucking explaining this shit to me! Helped alot to understand why it's not good for my old Husaberg to drive on the asphalt!
Awesome straight forward explanation.
I ask this!! thx matt for answering!! i had a vague theory but not even consider the hammer action and the wear that would produce. Thx a lot!
... goes fookin-heyaaa! 😂 1:00
best explaination on youtube
fookin awesome video
I just bought a 1990 DR350S, the street legal model, and came here to reckon if it would have a cush drive or not. Seeing the video, I doubt it.
Would you belive this helped me RC hobby. Looked up cush drive and this was 1st, what a UfnuQin great explanation of the Cush, also u sound as tho this bike has been in time and time again and the owner won't listen when u tell em not to do that.... And then another day u see the same UfnuQin bike at your shop door,... Wicked vid bud
Great video 🤘🏼
Interesting video
The cush drive is called a "Rear Wheel Compensator Sprocket Isolator" by Harley-Davidson.
LOL well it fucking would be
Great topic Matt. I see you are using a wave rotor and I was wondering what your opinion is on using them verses a standard round type? Wear characteristics like warp, Pad wear etc. Thanks and keep the videos coming!
I knew what it was in the last video everything is explained on this channel its like impact injection makes all the difference with it
Kush drive eh? *Snoop Dogg starts playing in the back ground*
I typed "kush drive" into google and ended up here... ahahahahahahah
You are not funny, you are corny and lame
Del would call it a cushty drive
How the fock can move back and forward the sprocket carrier of its on a rod with bearing? :D
Any tips on getting the rubber spuds through the holes thanks
I didn't buy mortard wheels for my husky because I'm broke so I just bought road tires without taking into account the cush drive. I don't know what to do now.
More cushion for the pushin' 😂
So did you have to put a higher durometer cush drive in your bike, being heavy and all 😁
I am looking at supermoto wheels for my drz 400s. There is an option for cush drive (adds $125) on the rear hub style. Is that part of the wheel that is like an extra thing? Or something that is already on my bike or not?
when your Hong kong phoeey kicks in.. cushty ;)
Chush drive stops things from fucking things and fucking them up ... got it👍
in german it´s called shock dampener.so yeah the name of it tells you what it does xD
Fuckin' great fuckin' video about these fuckin' cush drives😄👍
Mine lasted for 6 years before turning into a gooey mess that looked like 8 blocks of chocolate.
I wonder if there's a better kind of rubber that I can use as a cush drive.
:3
Lol .. mine last about 10.000 km but I rode the shit out of it
@@chriscs9080 hehehe, so that's why it only lasted for 10,000 KM. 😅
It goes fuckin hiya does it now Mr Jackie Chan? Lol
Best comment!
Jackie Chain 🤣
Cush drive is first fucked up part when you overtight your chain. Good to mention.
Should I slather copper grease all over my cush drive?
If you slather some on your head it will prevent alien probing
Delboy uses it as a personal lubricant :P
Prolonged contact with the skin causes irritation......... that would explain a lot :D
You're killing me. LOL
If you've changed your rubber cushions and the sprocket carrier won't sit fully in the wheel. (It keeps rising back up!)
Any suggestions for a tighter fit?
This fuckery is ten times betta than wikki f'n pedestria.
Thanks, man. F*ckin A😎👍😂
do both front and rear take this or only the rear?
Both
Maybe this is my problem, when letting off the clutch in 1st gear the wheel vibrates n lurches
These dampers are not be taken lightly... I got mine misplaced when installing a new tyre and this misaligned caused the rear wheel slide, the engine to lug... This put a lot of stress on chain and sprockets.....
I finally got someone to take a look at this and voila, the bike now runs like butter
Sees Cush Drive
*Plays Snoop Dogg in the background*
What about bikes with a shaft drive? How do they deal with the loading?
How about one of these: www.2040-parts.com/kawasaki-650sx-x2-ts-sc-engine-motor-coupler-drive-shaft-rubber-damper-sx-650--i354478/
They also use this system
Me, because I'm still learning about things like, is wondering why the hell aren't the hubs just bolted to the rims so they can't move?
Because your engine would hammer the wheel to pieces.
@@thedirtyworkshop lol, I get that, but cars don't have that problem, that's why I'm wondering why a bike is different.
Although I could barely understand your English with your accent I clearly understood your point 😂 thanks
Just use the normal one and ride smooth, u can ride fast and smooth and your bike will last a long time. rubber cush drive will dry out over time.
Mine lasted for 6 years before turning into a gooey mess that looked like 8 blocks of chocolate.
I wonder if there's a better kind of rubber that I can use as a cush drive.
:3
@@nuclearwinter21 i put a new rear wheel on my bike and used a green polyurathane one. made in usa. You can prob find one on ebay. The company Alloy Art makes it.
Yea/nay? What are the pros and cons of cush?
There's pros. It stops your wheel rom cracking
Cush drive on all bikes or just the bigger bikes ?
Usually not drit bikes - even 125's have them
Thanks for reply.
LOL that was meant to be dirt*
😂
what's that song? almost sounds like death
alles klar klaus Slipknot (Vendetta), bit weak compared to Death! RIP Chuck.
Coldfin9er Ah I should have guessed from the drums! Never listened to them but the guitars here sound quite nice. Yeah poor chuck and his fucking brain tumor. rip
Now make "what's a fockin multimeeta for anyways"?
thx👍
How many blokes we talking
I am a cheap bastard and want to save some money. Will it be safe to shim up the cush rubbers with pieces of bicycle tube?
As soon as the cush drive is that undersized it starts to fall apart quite quick - but then again you're a Honda bumboy so common sense doesn't apply LOL
@@thedirtyworkshop Well it is actually on a YAMAHA XTZ 660 ... :D But the 50 pounds price for new rubbers may be the best thing. Thanks for the ever great channel.
When i read the title I though of weed XD
'Cush drive' sounds like a trans dimensional spaceship device that runs on weed ;)
didn't know suzuki use enkei wheels
Honda does too.
why dirt bikes dont have a cush drive??
because no one cares about dirt bikes LOL - Spokes - that's why
Matt I’m new to the channel but really enjoying the videos 👍🏻 have you done a vid on how the KYB sss forks work? I have them on my bike and do the oil change and seals myself just not sure how they work.
naveedaka Dirt bikes don't need them because the wheel can easily break traction on the dirt and provide a similar cush effect. There are aftermarket cush sprockets that are necessary for street legalizing big bore bikes. I learned this the hard way when I split my hub in half on my street legal WR450 aswell as broke most of the spokes, folded the sprocket in half, knotted up the chain, fucked the swingarm, and cracked the case.
miceeno thanks for your reply..but here in india we have a transroader....which doesnt have cush drive..
My xt660 has spokes and cush drives. I know cos they were an MOT warning so needed replacing
Proper English it is a damper. To dampen is to add a fluid. Your bike also has a shimmy damper. I was schooled in this on Bonanza aircraft. Their shimmy damper is a POS.
Thanks for putting it in a language I can fuckin relate to 👍🏼👍🏼😁.
Blay daff buyben malf fraggen das wooblen rarden mag fragen wheel.
A little like mb flexdisks
Fucking brilliant info
"wheel could go out of alignment" "chain will go slack and tight" lol what a load of bollocks man ! comical though
eeeeee fook me, its all fooked lad
Only £70 for a Triumph set , phew robbers.
First
pjbuckmaster finely new school didnt get first good job 👍
fucking hi-ya 😂😂😂
Second
I would have enjoyed this better if there had been no swearing, I'm no prude but get little pleasure out of listening to this common talk.
Not the channel for you then, move on
Would like to share it, but most people would be offended by so many "fokins" - I don't know why some people have to say that every other word to just explain something simple.
Because its a word, and words are not dangerous...