Your probably right, used to make tooling for Triumph, nothing made here anymore, won't pay UK engineering and manufacturing wages, but priced as if they are still made here and British this that and the other marketing 👎
@@Brit_Toolmaker Exactly, has to be the case. How else can an entire casting just break apart like that. Brittle fracture that wreaks of Chinese manufacture. I have seen videos where chinese rebar breaks apart just be dropping it on the floor. It´s like material science has not reached them yet.
Bad casting. Looks brittle, largish crystals visible where it fractured. Considering torque and loading of this component cast aluminium is not optimal.
Seen this before on these. Burn outs, dumping the clutch causing fractures and letting go at a later data. Look for the tell tale bits of rubber on swing arm and rear end.
Agree. The rear tire looks very recent/new, and I imagine the previous tire, the one that was replaced, most likely was very 'squared off'/worn in the centre due to, as you mentioned, the excessive clutch dumping and burn outs...or maybe even incorrectly torqued axle nut after the tire was replaced.
Its a design flaw the centre part which is cast into the alluminium cush drive has all its drive through a star like shape which when under power is trying to expand the alluminium part that broke, the centre part would of been better having square shaped fingers sticking out that is cast into it that way the force is pushing on the alluminium not trying to expand it
Thansk for this, since I sold my twin and just bought a sprint ST with same set up on the rear, good to know if i ever lose drive, I have an idea what it may be :) £100 for the parts not to bad, hopefully mine flys through its MOT with you a week on Saturday :)
@doncastermotorcycles I know what my luck is like, I'm going ABR this weekend, it'll go while I'm there and I'll be person #2 in the world to habe this problem and habe to be recovered home haha
Hi guys… I’ve just taken my Cush drive off my 2018 triple rs after noticing movement in the hub/sprocket carrier. I found the piece cast into the centre of the Cush drive that receives the splined shaft has definite movement of a couple millimetres/degrees, I went in there thinking it was the Cush rubbers that needed replacing ! That 2 millimetres or degrees at the Cush drive centre then increases because of the size of the wheel… if you see what I mean. I phoned my local triumph dealer and was met with the old chestnut of ‘oh never heard of any problems with the Cush drives’ ?? I had problems setting the chain slack as well as chain lash when changing gear. I think it’s down to poor design and crap production practices.
My bike has 11k miles on it. Great video and it’s helped me out a lot !! I’ll get a new Cush drive centre as the movement in mine is definitely not correct 👍
Look at the chain gear, 6:59. The wear on the tyre side is clear and well defined, it's not the same around that sprocket. Some higher, at the point your left index finger is behind the sprocket, compared to the area above your right index, than others. So the chain is moving as if tighter on part of the sprocket. Chain is not running straight. I would measure the rear axle run out, on both sides, without the carrier. Then measure with carrier, but without chain.
Typical Triumph some bits are great some would disgrace a Chinese Kids Bicycle, Always find them well overpriced for the actual Quality of the Machines.
Like dyson - lots of cash, any money spent on production is literally all about looks, quality is mediocre at best and then the planned obcelesence hits.
Those tiny teeth match up to tiny splines, so why why would they need to be big teeth ?. Disgraceful engineering ?.Could not the drive have been subjected to a severe shock load at some stage in its life ?. ' Alloy ' casting , would that be aluminium or steel ?.
Hamfisted wheelie attempt, big pothole, whoever fitted new rear tyre, over tightened wheel nut, i would be onto triumph about it to get a new complete hub assembly,.
That cush centre is way under-engineered. It does not fail on every Speed Triple by some miracle. Pretty lame interference design between the splined part and the aluminum centre.
Owned these, know plenty who do and have never seen that or heard of it. I suspected QS but thats what the cush drive is made to stop (well partly so anyway), it absorbs heavy shockloads. Got to be a material defect. I wouldve contacted Triumph myself, see if they had a faulty batch.
Such alloy components would be more durable if they were spun cast instead of gravity cast, (gravty cast leaves more open grain which looks like a crunchy bar); A spun cast item packs the molecules in much tighter and or denser, thus giving a stronger billet.
@@doncastermotorcycles You are welcome, a similar scenario is extant with plastics, KTM used to have problems with their throttle bodies going out of sync, due to the injection moulded nylon gears shrinking back after manufacture; which created too much play, ,thus upsetting the very fine fully open and closed timing/settings, the bikes would cut out for no reason when changing gear, they have replaced these gears with metal to stop this from happening.
LOL it does not pack the molecules tighter😂😂😂. It allows faster liquid metal flow rate through mold during casting before solidification can occur from cooling that can cause excessive porosity. Porosity is trapped air instead of solid metal.
@@DavidStevenson-gw2eo Did you not read what I stated? What you stated was false information. You cannot technically pack the metal molecules closer together. It is reducing the amount of air entrained within the metal that increases the density therby eliminating porosity. It is most likely an aluminum part and for that you would use die casting not centrifugal casting. Centrifugal casting is more commonly used for cylindrical parts.
I'd see about a whole swingarm replacement. Get rid of that single sided junk. And use a conventional twin beam set up. And get rid of that crush drive system.
Ducati, BMW and many others use single sides swinging arms with no issues. Every chain driven bike I have ever owned has had a Cush drive, it is fitted to remove the shocks associated with the drive train, acceleration, braking, gear changing and road surface. What is your well thought out engineering solution to remove a Cush drive and still remove the loads associated with a direct drive setup? If you have one, wow! you would make a fortune on the Patent. 😮
Chinesium alloy strikes again. Just when you thought you´ve seen it all.
we used to call it monkey metal back in the day , that's apprentice trained engineers for you ............
Your probably right, used to make tooling for Triumph, nothing made here anymore, won't pay UK engineering and manufacturing wages, but priced as if they are still made here and British this that and the other marketing 👎
@@Brit_Toolmaker Exactly, has to be the case. How else can an entire casting just break apart like that. Brittle fracture that wreaks of Chinese manufacture. I have seen videos where chinese rebar breaks apart just be dropping it on the floor. It´s like material science has not reached them yet.
@@rafaellastracom6411 as long as someone, somewhere, anywhere! makes it for the "right" price it's now worthy of being a "British Bike"....
😂
Bad casting. Looks brittle, largish crystals visible where it fractured. Considering torque and loading of this component cast aluminium is not optimal.
🤔
Seen this before on these. Burn outs, dumping the clutch causing fractures and letting go at a later data. Look for the tell tale bits of rubber on swing arm and rear end.
Agree. The rear tire looks very recent/new, and I imagine the previous tire, the one that was replaced, most likely was very 'squared off'/worn in the centre due to, as you mentioned, the excessive clutch dumping and burn outs...or maybe even incorrectly torqued axle nut after the tire was replaced.
Can’t get a history report as it’s new to owner 🤔
That bearing housing looks damaged???
🔧
Its a design flaw the centre part which is cast into the alluminium cush drive has all its drive through a star like shape which when under power is trying to expand the alluminium part that broke, the centre part would of been better having square shaped fingers sticking out that is cast into it that way the force is pushing on the alluminium not trying to expand it
😉
Thansk for this, since I sold my twin and just bought a sprint ST with same set up on the rear, good to know if i ever lose drive, I have an idea what it may be :) £100 for the parts not to bad, hopefully mine flys through its MOT with you a week on Saturday :)
@@michealoxtoby8995 according to a triumph tech it’s never been an issue this is a one off, but if it happens you now know 😉
@doncastermotorcycles I know what my luck is like, I'm going ABR this weekend, it'll go while I'm there and I'll be person #2 in the world to habe this problem and habe to be recovered home haha
@@michealoxtoby8995 😂
ask Triumph , could be a material/quality issue on that cushion
👍🏻
Hi guys… I’ve just taken my Cush drive off my 2018 triple rs after noticing movement in the hub/sprocket carrier. I found the piece cast into the centre of the Cush drive that receives the splined shaft has definite movement of a couple millimetres/degrees, I went in there thinking it was the Cush rubbers that needed replacing ! That 2 millimetres or degrees at the Cush drive centre then increases because of the size of the wheel… if you see what I mean. I phoned my local triumph dealer and was met with the old chestnut of ‘oh never heard of any problems with the Cush drives’ ?? I had problems setting the chain slack as well as chain lash when changing gear. I think it’s down to poor design and crap production practices.
My bike has 11k miles on it. Great video and it’s helped me out a lot !! I’ll get a new Cush drive centre as the movement in mine is definitely not correct 👍
Glad it helped 😊
With the size of the chicken strips on that rear tyre you know it hasn't been raced 😂
OUCH 😂
Your a bell end grow up 😊
5:24 Is that a steel bit that's cast into the alloy? Looks similar to a VFR one
Yep 👍
All the power going the a small 1/8 ring of aluminum, looks like 1st of many to come. Future recall !!!
Maybe
Probably a badly cast cush drive centre which stress fractured OR maybe down to excessive play I'd examine the cush rubbers too.
Thats my thought but there's other viable ideas. 😎
Maybe an excessive transmission chain tension?
it did look ok but thats a possibility
Look at the chain gear, 6:59. The wear on the tyre side is clear and well defined, it's not the same around that sprocket. Some higher, at the point your left index finger is behind the sprocket, compared to the area above your right index, than others. So the chain is moving as if tighter on part of the sprocket. Chain is not running straight.
I would measure the rear axle run out, on both sides, without the carrier. Then measure with carrier, but without chain.
👍
Typical Triumph some bits are great some would disgrace a Chinese Kids Bicycle, Always find them well overpriced for the actual Quality of the Machines.
🤔
Who fitted the new tyres? was it re assembled wrong after the tyre was changed or damaged when they did the job.
There is just 1 big nut holding the wheel on at the other side so shouldn't cause problems with cush drive .
Not sure the bikes pretty new to the owner and they were already fitted 🤔
That could be a clue. Damage done before the new owner got it, new tyre hiding evidence of abuse, or new owner not used to quickshifter etc?
Field Marshall chicken strip owns that bike by the looks of it. !!!. Hows he broke that 😂
🧐
Unfortunately you can judge the quality by the price, the dealer cost of the entire transmission for the 1200 shaft drive is less than $300.
👍
Triumphs really are crap! Look at the tiny teeth moulded into the alloy casting! Disgraceful engineering.
Ouch 😆
Like dyson - lots of cash, any money spent on production is literally all about looks, quality is mediocre at best and then the planned obcelesence hits.
Those tiny teeth match up to tiny splines, so why why would they need to be big teeth ?. Disgraceful engineering ?.Could not the drive have been subjected to a severe shock load at some stage in its life ?. ' Alloy ' casting , would that be aluminium or steel ?.
Looking at the sprocket teeth, it looks like the rear wheel was out of line.
How is that even possible? it is a single sided swingarm… wrongly assembled maybe?
🔧
😖
Hamfisted wheelie attempt, big pothole, whoever fitted new rear tyre, over tightened wheel nut, i would be onto triumph about it to get a new complete hub assembly,.
Wheel nut is on the other side, this is the hub nut, not touched for tyre change.
😳
Too many wheelies and clutch dumping.
😳
CC, but not as in cubic capacity, more like, cast crap lol
Ouch 😆
the shock of wanging the axle nut up with an air gun?.
That could be one possibility, I’ve seen many a calamity caused by the buzz gun brigade
That cush centre is way under-engineered. It does not fail on every Speed Triple by some miracle. Pretty lame interference design between the splined part and the aluminum centre.
🤔
somebody installed a centrifugal clutch?
😂
The name of that part is the POS drive
🤭
Owned these, know plenty who do and have never seen that or heard of it. I suspected QS but thats what the cush drive is made to stop (well partly so anyway), it absorbs heavy shockloads. Got to be a material defect. I wouldve contacted Triumph myself, see if they had a faulty batch.
Can’t rule that out but heard nothing in the grapevine yet
I have sssa on my sprint rs 2004 could this become a problemn in future what's the mileage of vehicle?.
I don’t recall but it wasn’t high
Chain too tight? When the suspension compresses, the chain gets tighter and cracks the sprocket carrier.
It would definitely exacerbate any issues
Such alloy components would be more durable if they were spun cast instead of gravity cast, (gravty cast leaves more open grain which looks like a crunchy bar); A spun cast item packs the molecules in much tighter and or denser, thus giving a stronger billet.
That's a lesson for me, thanks David 😊
@@doncastermotorcycles You are welcome, a similar scenario is extant with plastics, KTM used to have problems with their throttle bodies going out of sync, due to the injection moulded nylon gears shrinking back after manufacture; which created too much play, ,thus upsetting the very fine fully open and closed timing/settings, the bikes would cut out for no reason when changing gear, they have replaced these gears with metal to stop this from happening.
LOL it does not pack the molecules tighter😂😂😂. It allows faster liquid metal flow rate through mold during casting before solidification can occur from cooling that can cause excessive porosity. Porosity is trapped air instead of solid metal.
@@kannermw Centrifugal spun cast is always superior to gravity cast moulding, the ultimate billet is one that has been compressed before milling..
@@DavidStevenson-gw2eo Did you not read what I stated? What you stated was false information. You cannot technically pack the metal molecules closer together. It is reducing the amount of air entrained within the metal that increases the density therby eliminating porosity. It is most likely an aluminum part and for that you would use die casting not centrifugal casting. Centrifugal casting is more commonly used for cylindrical parts.
Quick changed and shite casting
🤔
Cush drive gone
No it was it good shape
Rider abuse
🤔
Wheelie damage!!
🤔
The cause =the hub nut being massively overtightened and not torqued to correct settings I recon
Strong possibility
I'd see about a whole swingarm replacement.
Get rid of that single sided junk. And use a conventional twin beam set up.
And get rid of that crush drive system.
Ducati, BMW and many others use single sides swinging arms with no issues.
Every chain driven bike I have ever owned has had a Cush drive, it is fitted to remove the shocks associated with the drive train, acceleration, braking, gear changing and road surface.
What is your well thought out engineering solution to remove a Cush drive and still remove the loads associated with a direct drive setup? If you have one, wow! you would make a fortune on the Patent. 😮
😳