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Author Topic: Yamaha T7 - No longer a Concept  (Read 330990 times)

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Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5120 on: October 10, 2021, 06:58:05 am »
KTM Guys .. Don't get all upset but I have not heard of any T 700  having to agave engine work done after 16 000 KM .........just sying  :pot:
https://www.tenere700.net/topic/3581-major-engine-failure-and-mt07-engine-compatibility/
Quote
Four months ago my Tenere engine failed spectaularly. Despite all the glowing reports on how reliable this engine is, failed spectacularly at less than 3000 miles. A valve hit the piston on the left cylinder, broke off, chaos ensured and destroyed everything between (and including) the crank and the cams. The whole incident sounded like a concrete mixer and took no more than a few seconds as I grabbed the clutch and switched the engine off
The pictures in the linked post above have not been displayed so as not to upset sensitive viewers.
 :3some:
The owner of this T7 said the only abnormal thing he did, was to  roll the bike backwards, and turned the engine opposite to normal rotation.

Might have damaged a cam chain tensioner, with cam timing out now.

He said the motor didn't sound normal after the roll back, when he started it.

I've no idea how he accomplished the roll back, and opposite rotation of the motor. Bump starting a bike in 1st gear comes to mind. About impossible.

Coming back to opposite rotation.

How would other manufacturers' motors have reacted to a roll back and opposite rotation?

@2 Stroke Dan

Danie, any input?

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Offline Cable Tie

Re: Yamaha T7 - No longer a Concept
« Reply #5121 on: October 10, 2021, 08:48:43 am »
So m.a.w die enjins is “bullet proof” maar nie “roll back proof” nie?

Sorry boys it was bound to happen at some point.


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Offline Cracker

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Re: Yamaha T7 - No longer a Concept
« Reply #5122 on: October 10, 2021, 11:10:37 am »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so?  :biggrin:
Don't let fear hold you back ..... take it with you!
 

Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5123 on: October 10, 2021, 12:30:26 pm »
So m.a.w die enjins is “bullet proof” maar nie “roll back proof” nie?

Sorry boys it was bound to happen at some point.


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Heel moontlik. Weet nie hoe die javel dit reg gekry het nie?

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Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5124 on: October 10, 2021, 12:35:33 pm »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

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Current Bikes : KTM 990 R, Yamaha T7 Tenere

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Offline voorvel

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Re: Yamaha T7 - No longer a Concept
« Reply #5125 on: October 10, 2021, 12:38:56 pm »
Roadbike motors in adv bikes.  :thumleft:

Luckily there is a spare combustion chamber available.
That is mos why everyone is so keen to move away from thumpers; for the redundancy that 2 cylinders bring  :pot:
 
« Last Edit: October 10, 2021, 12:39:31 pm by voorvel »
 

Offline voorvel

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Re: Yamaha T7 - No longer a Concept
« Reply #5126 on: October 10, 2021, 12:48:49 pm »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

Sent from my FIG-LX1 using Tapatalk

Jus ek glo swaar. My 990 het veel meer torque gehad hoor.
Maak dalk net die onderskeiding tussen torque en sprocket ratios.

Kyk maar: n 990 het orals meer torque, no contest
 

Offline Noneking

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Re: Yamaha T7 - No longer a Concept
« Reply #5127 on: October 10, 2021, 12:53:40 pm »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

Sent from my FIG-LX1 using Tapatalk

Jus ek glo swaar. My 990 het veel meer torque gehad hoor.
Maak dalk net die onderskeiding tussen torque en sprocket ratios.

Kyk maar: n 990 het orals meer torque, no contest

Moet nou nie chopper se storie spoil met feite nie.............. Ek was nog bezig om te lag oor daai post :laughing4:

Lyk my die blou CoolAid is self meer potent as die oranje waaraan ek gewoond is.
« Last Edit: October 10, 2021, 12:54:45 pm by Noneking »
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Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5128 on: October 10, 2021, 01:25:49 pm »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

Sent from my FIG-LX1 using Tapatalk

Jus ek glo swaar. My 990 het veel meer torque gehad hoor.
Maak dalk net die onderskeiding tussen torque en sprocket ratios.

Kyk maar: n 990 het orals meer torque, no contest
Dis op papier, ek praat van werklike ry ervarings.

Sent from my FIG-LX1 using Tapatalk

Current Bikes : KTM 990 R, Yamaha T7 Tenere

End of an Era : Suzuki DR 650 SE, Husqvarna 610 TE, KTM 500 XCW
 

Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5129 on: October 10, 2021, 01:27:47 pm »
Roadbike motors in adv bikes.  :thumleft:

Luckily there is a spare combustion chamber available.
That is mos why everyone is so keen to move away from thumpers; for the redundancy that 2 cylinders bring  :pot:
Nog ń voordeel van ń T7! Bliksem, jy's wakker VV.

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Offline 2StrokeDan

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Re: Yamaha T7 - No longer a Concept
« Reply #5130 on: October 10, 2021, 05:41:29 pm »
KTM Guys .. Don't get all upset but I have not heard of any T 700  having to agave engine work done after 16 000 KM .........just sying  :pot:
https://www.tenere700.net/topic/3581-major-engine-failure-and-mt07-engine-compatibility/
Quote
Four months ago my Tenere engine failed spectaularly. Despite all the glowing reports on how reliable this engine is, failed spectacularly at less than 3000 miles. A valve hit the piston on the left cylinder, broke off, chaos ensured and destroyed everything between (and including) the crank and the cams. The whole incident sounded like a concrete mixer and took no more than a few seconds as I grabbed the clutch and switched the engine off
The pictures in the linked post above have not been displayed so as not to upset sensitive viewers.
 :3some:
The owner of this T7 said the only abnormal thing he did, was to  roll the bike backwards, and turned the engine opposite to normal rotation.

Might have damaged a cam chain tensioner, with cam timing out now.

He said the motor didn't sound normal after the roll back, when he started it.

I've no idea how he accomplished the roll back, and opposite rotation of the motor. Bump starting a bike in 1st gear comes to mind. About impossible.

Coming back to opposite rotation.

How would other manufacturers' motors have reacted to a roll back and opposite rotation?

@2 Stroke Dan

Danie, any input?

Sent from my FIG-LX1 using Tapatalk


In 1981 we were all having fun at a hillclimb otside Stellenbosch, and one of us on a XR500 were revving the tits off the bike to get speed to make it up a hill. As he gets near the bottom, he wanted to change up into 3rd, but he stepped down a gear.

Same result, valve-head broke off and considering the real-world flawless reliability record of the CP-2, I am sure it was operator error.

You cannot over=rev these engines on the gas, due to the rev limiter as fitted to most modern bikes, but you can manually overrev them by downshifting too fast, or by accident.
 

Offline Noneking

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Re: Yamaha T7 - No longer a Concept
« Reply #5131 on: October 10, 2021, 06:12:48 pm »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

Sent from my FIG-LX1 using Tapatalk

Jus ek glo swaar. My 990 het veel meer torque gehad hoor.
Maak dalk net die onderskeiding tussen torque en sprocket ratios.

Kyk maar: n 990 het orals meer torque, no contest
Dis op papier, ek praat van werklike ry ervarings.

Sent from my FIG-LX1 using Tapatalk


Jou 990 is in 10 jaar skaars ingeloop. Ek bevraagteken jou “werklike ervaring”
2021 KTM 890 R Rally
2007 KTM 990 S

NONEKING'S RIDE REPORTS - http://www.wilddog.za.net/forum/index.php?topic=226099.0
YOUTUBE CHANNEL - https://www.youtube.com/channel/UCaEGQBgLPqOXz6oGUsauaXw
 

Offline 2StrokeDan

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Re: Yamaha T7 - No longer a Concept
« Reply #5132 on: October 10, 2021, 06:56:06 pm »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

Sent from my FIG-LX1 using Tapatalk

Jus ek glo swaar. My 990 het veel meer torque gehad hoor.
Maak dalk net die onderskeiding tussen torque en sprocket ratios.

Kyk maar: n 990 het orals meer torque, no contest
Dis op papier, ek praat van werklike ry ervarings.

Sent from my FIG-LX1 using Tapatalk


Jou 990 is in 10 jaar skaars ingeloop. Ek bevraagteken jou “werklike ervaring”



Henk weet wanneer n KTM hou.....ry hom nooit. :pot: :pot: :pot:
 

Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5133 on: October 12, 2021, 11:59:12 am »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

Sent from my FIG-LX1 using Tapatalk

Jus ek glo swaar. My 990 het veel meer torque gehad hoor.
Maak dalk net die onderskeiding tussen torque en sprocket ratios.

Kyk maar: n 990 het orals meer torque, no contest
Dis op papier, ek praat van werklike ry ervarings.

Sent from my FIG-LX1 using Tapatalk


Jou 990 is in 10 jaar skaars ingeloop. Ek bevraagteken jou “werklike ervaring”
Darem so paar bulte uitgery in die 10 jaar, en 15 000km.

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Current Bikes : KTM 990 R, Yamaha T7 Tenere

End of an Era : Suzuki DR 650 SE, Husqvarna 610 TE, KTM 500 XCW
 

Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5134 on: October 12, 2021, 12:02:19 pm »
It can happen, if you try to follow a KTM up a hill. Your lack of power will soon be evident and you will stop and roll back down, turning the engine backwards.

This is the reason all KTM owners carry tow ropes, not so? 
The tow ropes are for yourself, as KTM rider.

I carry an orange one.

Rob, to be honest, the T7 has better low down torque than most bikes, and definitely KTMs.

My 990 is one teeth down in the front (17 - 16) and three up on the rear sprocket (42 - 45). Still doesn't come close to the T7's low down torque.

You get assholes on any brand of bike!

Sent from my FIG-LX1 using Tapatalk

Jus ek glo swaar. My 990 het veel meer torque gehad hoor.
Maak dalk net die onderskeiding tussen torque en sprocket ratios.

Kyk maar: n 990 het orals meer torque, no contest
Dis op papier, ek praat van werklike ry ervarings.

Sent from my FIG-LX1 using Tapatalk


Jou 990 is in 10 jaar skaars ingeloop. Ek bevraagteken jou “werklike ervaring”



Henk weet wanneer n KTM hou.....ry hom nooit. :pot: :pot: :pot:
Net so Danie! Daarvoor die eienaarskap van die betroubare T7.

Ek waag dit egter binnekort op die 990 in die Oos-Kaap vir ń week. Darem net ń rustige vakansie rit saam met ń BMW vriend.

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End of an Era : Suzuki DR 650 SE, Husqvarna 610 TE, KTM 500 XCW
 

Offline 2StrokeDan

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Re: Yamaha T7 - No longer a Concept
« Reply #5135 on: October 12, 2021, 07:20:39 pm »
Geniet daai trip Henk!
 

Offline chopperpilot

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Re: Yamaha T7 - No longer a Concept
« Reply #5136 on: October 12, 2021, 08:22:21 pm »
Geniet daai trip Henk!
Dankie Danie!

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Current Bikes : KTM 990 R, Yamaha T7 Tenere

End of an Era : Suzuki DR 650 SE, Husqvarna 610 TE, KTM 500 XCW