How much harder on the bike is being at top speed?

[rideslikean00...]

Just a question of interest more than anything. If you're pinning it in top gear at the absolute limit of a bike in a straight line for say ten to twenty minutes straight, (a bigger bike say 600cc-1000cc, not just a 125) how much harder is that going to be on it rather than regular 0-60mph type A roading? Would you change your oil more regularly if you're right at the top end on a regular basis?
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Previous/Current Bikes
2013 Yamaha YBR-125ED -> 1997 Yamaha YZF-1000R Thunderace -> 2009 Yamaha XJ-6 Diversion -> 2007 Yamaha FZ6 Fazer S2

[johnsmith222]

I'm not really sure why anyone would want to sit at top speed for 20 minutes as it's not likely to be comfortable and certainly isn't going to do the bike any favours.

depending on the 600 or 1000, you could be talking about sitting at 150 to about 190mph for 10 to 20 minutes.

Personally I'd take it easy and let the bike warm up for a bit, and cruise between 110 and 130mph, provided the bike doesn't feel like it's being pushed too hard or isn't comfortable at that speed.

[thx1138]

only bikes I've ever had pinned full open in top, and stopped accelerating, are 125s and 250s fairly ordinary commuter types too

[wr6133]

160mph - 53(ish) miles in 20 minutes. I doubt you are going to find a bit of road you can hold that speed for that distance.

[c_dug]

I sat at over 140 on the M1 on a ZZR600 for a fairly extended time before, talking probably 10 minutes minimum.

It was concern for tyres that slowed me down (I don't think I dropped much below 110 for the entire motorway section of my journey from Hull to London though.

I probably wouldn't hold it at absolute maximum for an extended time though, the risk of something going pop at those speeds would put me off.
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[Ste]

[Pete.]

Where will I find 80 miles of straight road anyway?
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[recman]

I probably would take the right bike to the limit for a few minutes but not one like mine with virtually no wind protection.
I hacks me off if I have to do more than a ton for anything over a minute.

[Nobby the Bastard]

Don't know. Mine should top at 170 mph...
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Triumph Sprint ST 1050

[mentalboy]

[Polarbear]

I would expect any modern (non chinese pos) bike to handle it fine.
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[Kickstart]

Hi

Quite a lot of stress on the engine (and everything else).

Think of it that every time a piston has a combustion stroke it is like being punched. At lower speeds the piston can push the crank round (accelerating the bike) easily, with as speed increases it is increasingly difficult to push the crank round. So going with the punching analogy, the difference between punching something solidly located, and punching something that can easily move away from you.

Oil is only part of it.

[Pete.]

[andym]

When I first got my diversion it was flat out for the first week whenever I got on the motorway... mind you that was only 115, I only stopped because the fuel economy was crap doing that

[Chuffin Nora]

[Major Doss]

Anecdotally..
£500 'mint' gpz900r in Uttoxeter.
4 hours and £70 joy on 'railways'.
1.5 hours home. inc. 2 fuel stops and one stop on the N circ to retrieve a pannier. Fair to say, it may have been 'ragged' slightly.

In no way could I ever have been held up in the fast lane, whatsoever, as we all know that such a lane doesn't exist. Whatsoever.
Regardless of Audi's wot fink dey iz quik...

Flogged at a princely deficit after ### Motorcycles ruined the fully functioning forks. Nevermind the Trumpet that shat itself, that I got blamed for. Because poppit wheelies are directly responsible for MK1 Hinckley Triumph sprag clutches shitting themselves out of the motor. Out of the motor. Metal past the Mk1 human right earhole, oil spewage vomit utterly regardless. You have seen war films? THAT sort of metal past the earhole. Black claret everywhere. ask Bodyform.
Apparently.
Got the sack for that.

Crap gaff, really. Blown up shit everywhere.

Royal Enfield dealership, now. Allegedly.

Christ on a stick. What cunts! yup. IME.
#### of ### had the chance to argue the toss with me, before anyone thinks I am dishing dirty....

Sorry, back on topic;
Engine? Rag it!
Oil and filter. rag it a bit more.

BTW '84 9r's wobble at 120.....press on, levels out, even on a square BT45

edited to keep me out of court

[stevo as b4]

There's possible engine wise alone, less stress incurred in a top speed run than there would be running high revs/high load at slow speeds when theres not a 150mph wind blast through the radiator and oil coolers etc?

Holding say a 600cc engine at 12000rpm, on a braked dyno or maybe even when climbing a long steep mountain pass when there's less air flow through the cooling systems could result in higher thermal load, increased pressure in the cooling system, and hotter combustion chamber temps due to it being harder for the engine to get rid of the excess heat?

But then top speed runs are like a big loaded dyno I guess in that the aerodynamic drag is putting the strain on things instead?

At 150mph+ I'd be more worried about a puncture, or a chain snapping than I would be about lunching a motor though, unless we are talking two smokes?

[yen_powell]

[Itchy]

[hmmmnz]

I did hours apon hours of full speed riding on my bandit 1200 across Germany. Had to stop every hour or less to fill up. But the bandit did it with no complaints.
It's hard work on the body though.
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I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[Northern Monkey]

I've sat for a long time with the msx totally flat out. It is only a 125, but I did a big section of M9, A720 and A1 totally flat out.
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[stinkwheel]

A friend of mine had his bike break down (GSXR1100 based Harris) on day 1 of a 2 week European tour. Turns out he had super-special recovery which provided him with a hire bike for the duration of the trip.

Man came in a van, picked up the Harris for recovery to the UK and dropped off his low mileage, unfaired CB500.

Off they set, 5 litre+ bikes heading for Slovenia and a CB500.

By means of careful slipstreaming behind a ZZR1100 with hard luggage and coded headlight flashes (one flash for slow down a bit, I'm dropping out of your wash and two for speed up a bit) you can apparently get a CB500 up to 140mph and keep it well over 120mph for a protracted period.

By the time it was given back, it's arse was hanging out. Smoking badly, leaking coolant, rattling like a clocked superdream, clutch slipping, chain and sprockets shagged and tyres worn out and blistered (speed rating on a CB500 tyre?).

He basically killed it in 12 days, just by riding it flat out all the time.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[rideslikean00...]

[0l0dom0l0]

It would be fine.

I work developing engines and the abuse they withstand on a dyno is impressive.
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CBT Passed: 30/08/2009, Theory Passed: 31/08/2010, Mod 1 Passed: 6/9/2010, Mod 2 Passed: 13/09/2010. Restriction ended 13/09/2012.

Bikes: 2007 Derbi GPR 50, 1998 Yamaha Fazer 600 (written off), 2002 Yamaha Fazer 600, 1994 CBR 600F, 2003 Triumph Daytona 600, Kawasaki ZX6R J1.....Current: 2006 Yamaha FZ6, 1998 Suzuki TL1000R and a Honda VFR 400 NC30.

[stevo as b4]

Id be interested to know more!

Do you think for example that a programed dyno running program can replicate all the ways that a user can abuse an engine out on the road though?

Do engine dyno's generally have a feature to be able overdrive the engine, and then suddenly snap the throttle open and let the engine drive the dyno again?

I know about things like the thermal shock test rigs that manufacturers use, but how do you simulate things like crap drivers, people putting the vehicle into the wrong gear, and things like crank end loading from riding the clutch pedal?