Roadster transmission problems sorted.... My a***!

[Neville Lush]

So not 137 pulls of 13 minutes. You're talking 137 20 second pulls. You wouldn't changing a gear in the middle of your 20 second test, either,and peak torque is probably at 7500rpm.Whatever. The stock gearbox is not always good on these bikes.

 

[rocketjohn]

I am sure Triumph intended a robust enough transmission for the way they were building the bike, nevermind how it gets put together for there is always going to be slip ups there. But the engine of the Rocket is so easily is persuaded to greater and greater outputs, that something downstream just has to give. I suspect someone is going to figure out how to stuff a Muncie or Ford Toploader behind a Rocket engine.

 

[mr hunt]

So not 137 pulls of 13 minutes. You're talking 137 20 second pulls. You wouldn't changing a gear in the middle of your 20 second test, either,and peak torque is probably at 7500rpm.Whatever. The stock gearbox is not always good on these bikes.

...and at best 50km of work, without the associated wear of cool down and warm up cycles and as you noted - actual gear changes.

 

[cusso ken]

I am sure Triumph intended a robust enough transmission for the way they were building the bike, nevermind how it gets put together for there is always going to be slip ups there. But the engine of the Rocket is so easily is persuaded to greater and greater outputs, that something downstream just has to give. I suspect someone is going to figure out how to stuff a Muncie or Ford Toploader behind a Rocket engine.

I have 18 speed Eton Fuller Roadranger gear box in the shed that we have just replaced the clutch brake on, looking at the Fly wheel Clutch and cogs in that bad boy I reckon A rocket would be flat out turning it over let alone hurting it ,I have smashed a top loader(2nd gear) behind a Ford 460 big block but would handle the Rocket engine, gee the bell housing would be a work of art

 

[IMFASTTOO]

I'll get some pics sent to you for ref. Does the owner of the 500 HP bike actually ride it or just show it off? I guess if yone had 500 Hp and Pootle around at 50 all day there would be no stress on the bike. The Triumph guys reckon it can happen with bikes that are ridden hard and bikes that are not. The lack of undercutting could have something to do with it and on mine you can see rounding of the dogs which presumably lead to the slipping feeling!

Re other comments suggesting bad riding style - I have been riding bikes for 20 years and have to say this is the first time this has ever happened. I guess by now I know what the left lever is for and when best to use it in combination with the gear shift!

WELL once you miss a shift and round off the dogs you have a problem it will not stay in gear and will have to come apart sloppy shifts wiil damage the gearbox on any bike so keep that in mind and always use the clutch when you shift

...and at best 50km of work, without the associated wear of cool down and warm up cycles and as you noted - actual gear changes.

...and at best 50km of work, without the associated wear of cool down and warm up cycles and as you noted - actual gear changes.

THATS not total time on the DYNO the top gear full load pulls are held for 20 seconds @10,000 rpm and of course there is warmup and cool down between runs and the necessary gear changes for each run

 

[IMFASTTOO]

I am sure Triumph intended a robust enough transmission for the way they were building the bike, nevermind how it gets put together for there is always going to be slip ups there. But the engine of the Rocket is so easily is persuaded to greater and greater outputs, that something downstream just has to give. I suspect someone is going to figure out how to stuff a Muncie or Ford Toploader behind a Rocket engine.

Most gearbox problems are caused by human error

 

[WyldCFH]

Human Error - the thing that happened when Triumph engineers designed the R3 tranny - what happened when the chief engineer at Triumph hired the guy that designed the R3 tranny. Take your pick.

 

[IMFASTTOO]

...and at best 50km of work, without the associated wear of cool down and warm up cycles and as you noted - actual gear changes.

well lets see at 10,000 rpm in 5th gear would be traveling about 266 mph and hold that speed for 20 seconds how far would the bike have traveled ?

 

[cusso ken]

well lets see at 10,000 rpm in 5th gear would be traveling about 266 mph and hold that speed for 20 seconds how far would the bike have traveled ?

1.477miles

 

[IMFASTTOO]

1.477miles

TIMES 137 runs = 202.34 miles