high revs at 100km/h?

[madandy]

My 400 buzzes along at 6000rpm in 6th at 100km/h...To me this seems a bit high...I dont know if its been geared down I hardly ever need to shift down to overtake and can leave it in top round town at 50-60km/h...seems a waste of a 6 speed cog box...what do you all reckon?

[Hitcher]

A 400 is still a smallish engine. Where's your redline on that thing? That will give you a steer. My 250 runs at 6500rpm at 100kmh in top, whereas my 1200 runs at 3500. The 250 is redlined at 14,500 and the 1200 at 10,500.

[mangell6]

On the FZ1 I travel at 100kmh in fourth at 5,000rpm, I find that being in sixth at 4200rpm I get too much chain snatch and find that the higher revs are quite good. My redline is at 11500 or there abouts and have recentely been travelling in third gear at 5500. I have found this to be quite a combination as it allows me to roll on from about 4500rpm.

As the bike can do 120km/h in first gear, 160km/h in second I should ask the dealer for a refund on the fifth and sixth gears.

[Kwaka-Kid]

ZXR400H did 6,000rpm for 100kmph, with a 14,500 redline. the 88 VFR400 NC24 does 6,500rpm for 100kmph with a 14,000 redline, and yes i first thought it was a tad high, but now i dont think about it, oh and i checked both bikes and they have stock gearing... my power only just comes to the feel at 7,000or just over, so unfortunatly sitting @ exactly 100kmph is like in the middle of a flat spot.

[madandy]

Red-line is 12500rpm...power comes on about 7500rpm...so I spose its just sitting there a tad off cam waiting to be unleashed into the lower gears...It gives around 260kms on $15 96RON , got over 300k's once, draining her right down to near empty, took 16.5L to fill...

[Motu]

Yes,you are close to it - max torque is the important point of your power curve,that's where you feel the kick.My 750 has max torque at 5500rpm,that's 120kph,and that's where it's happy.The engine is most economical at this point and will hold it with minimum throttle.I will think you will find most bikes are set to about this - made for countries with different speed limits.

[wkid_one]

ZXR400H did 6,000rpm for 100kmph.

Is this a new speed measurement I don't know about....100 kilometre miles per hour.....that must be quick.....no wonder he is doing well on the race track - he is measuring himself in imperial units still.......

I have a question on this tho??

Why do we call a tyre a 190mm profile - yet a 17inch rim??? Why haven't rim sizes moved across to metric??? Why don't we call them 180/425 Tyres? hey now why is that....

Shit even our libraries are across to the Dewie Decimal System - but those Wheel Manus refuse to move across.

I don't know why I typed this - it just popped in to my head

[Andrew]

mine red lines at 19000 revs!!

[wkid_one]

mine red lines at 19000 revs!!

Jesus - is your bike made by Bernina or Moulinex? I would have changed gear twice on the VTR by the time you hit 2nd

[MikeL]

mine red lines at 19000 revs!!

Yes, and I've heard it at 19000 rpm in neutral, Andrew, and it's not a sound that you wan't to keep hearing for long...

When I saw the redline on my Honda 400 was 13500 I thought that was a bit on the high side, but compared to yours it's nothing.

At 100 kph mine is doing exactly 7000 rpm in 6th and that's where the power starts to come on, so overtaking is a breeze without the need to change down.

The GSX1200 on the other hand just deoesn't seem to be comfortable at 100 kph in top gear which is about 3700 rpm even though it has loads of torque, so I actually find myself changing down more often on the 1200 than on the 400.

[Kwaka-Kid]

yeah andrew ive heard it too.. eshk, hey dude just a quick tip, maybe dont free-rev your engine so much like that, and your valve guide seals might last a bit longer, at the rate the poor thing is deterriorating youll be putting a gallon of oil in a week... revv's low dude.. on my 400 i wont exceed 5,000rpm within 3km, and 6,500rpm within 5km, after that i will flex it out a few times to like 7-8 then 9-10ish, and once im convinced shes warm and acting right, ill start going near redline in tight twisties, but then on the straights i will flick it up like 3 gears at a time to reach 6th and let her idle back down to like 4-6,000rpm. maybe im overly-cautious on my engines, but ive done this to them all, and this ones mint, had it since 16,000km, now done 28,000km in 4months, and i change the oil religiously @ 3,000km...comes out almost as clean as it goes in (pretty close) and always putoline DX4 motorcycle oil... and it has not ever given me trouble at all, no smoke, and has the same feel it did the day i bought it...in saying how careful i am with the revv's it counts the same with how much throttle i give it under 5,000rpm too, i wont just bog her down and put full load against the poor rings as its hurting her cold just as much as building the revvs gradually (right?)... so yeah, and no labouring of the engine too! i also make a ponit to take the flattest way out form my place etc... do others do this? maybe i should start a new thread.. sorry to go off on such a rampage..hehe

[Andrew]

yeah andrew ive heard it too.. eshk, hey dude just a quick tip, maybe dont free-rev your engine so much like that, and your valve guide seals might last a bit longer, at the rate the poor thing is deterriorating youll be putting a gallon of oil in a week... revv's low dude.. on my 400 i wont exceed 5,000rpm within 3km, and 6,500rpm within 5km, after that i will flex it out a few times to like 7-8 then 9-10ish, and once im convinced shes warm and acting right, ill start going near redline in tight twisties, but then on the straights i will flick it up like 3 gears at a time to reach 6th and let her idle back down to like 4-6,000rpm. maybe im overly-cautious on my engines, but ive done this to them all, and this ones mint, had it since 16,000km, now done 28,000km in 4months, and i change the oil religiously @ 3,000km...comes out almost as clean as it goes in (pretty close) and always putoline DX4 motorcycle oil... and it has not ever given me trouble at all, no smoke, and has the same feel it did the day i bought it...in saying how careful i am with the revv's it counts the same with how much throttle i give it under 5,000rpm too, i wont just bog her down and put full load against the poor rings as its hurting her cold just as much as building the revvs gradually (right?)... so yeah, and no labouring of the engine too! i also make a ponit to take the flattest way out form my place etc... do others do this? maybe i should start a new thread.. sorry to go off on such a rampage..hehe

Thats alright I'll smack you into line if I feel you're rambling on too much!

[Motu]

I have a question on this tho??

Why do we call a tyre a 190mm profile - yet a 17inch rim??? Why haven't rim sizes moved across to metric??? Why don't we call them 180/425 Tyres? hey now why is that....

Shit even our libraries are across to the Dewie Decimal System - but those Wheel Manus refuse to move across.

I don't know why I typed this - it just popped in to my head

You just answered your own question - yes,it's a 180/425,but we call it an inch number just to make it clearer.Of course the French have used true metric tyre sizes,on the Light 15,DS19 and stuff.They didn't change the world to their way luckly.A lot of things haven't changed to metric,we just call them metric sizes - like chains...good old imperial still - 520 is 1/2 x 1/4...so that's 5 for the 1/2 inch 20 is 2 eigths.So is 25 two and one half eigths? so is a 540 the same as a 550? who needs to know that crap,not me!

[Slingshot]

mine red lines at 19000 revs!!

At these kinda revs can you imagine a piston breaking free, punching through the tank and smacking you in the chin

My bike red lines at 18500 revs, when you think about what that actually means it's quite amazing.
A piston probably smaller than a shot glass changing direction 37000 every minute (616 times every second) .

[Kwaka-Kid]

and where is the most load on a single part of an engine? conrod? no? i dont know.. guessing though, i vagually remember an alcohol influenced conversation with a bunch of rally dudes who apparently worked it all out and i think they said conrod? bottom connecting end of it.. maybe.. the alcomohol bit explains the poor memory, and possibly incorrect info