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7000RPM @ 60MPH?

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flyingcbf
Renault 5 Driver



Joined: 23 Aug 2021
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PostPosted: 12:45 - 14 May 2024    Post subject: 7000RPM @ 60MPH? Reply with quote

Hi All,
Is it normal for a 250cc bike to have such high revs?
Cheers Thumbs Up
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 12:51 - 14 May 2024    Post subject: Reply with quote

High? 7k?

Thats quite low.
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doggone
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PostPosted: 12:59 - 14 May 2024    Post subject: Reply with quote

Which 250cc do you mean, most 250cc 4 stroke engines will struggle to reach much over 70mph and if they do you are practically abusing them holding it for long.
Different engine types and tuning might give most power lower down where it is more useful at legal speeds.
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pdg
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PostPosted: 13:07 - 14 May 2024    Post subject: Reply with quote

If you're talking about the strom in your sig, then it can't officially top 90mph full whack to start with.

So yeah, while 7k isn't exactly screaming anyway (for a bike engine, cars are different) the 60mph you reference is over 2/3 of it's "good day" capability...
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Ste
Not Work Safe



Joined: 01 Sep 2002
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PostPosted: 13:45 - 14 May 2024    Post subject: Re: 7000RPM @ 60MPH? Reply with quote

flyingcbf wrote:
Hi All,
Is it normal for a 250cc bike to have such high revs?
Cheers Thumbs Up

What bike is it and what gear are you in?
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rpsmith79
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Joined: 31 Jan 2017
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PostPosted: 13:54 - 14 May 2024    Post subject: Reply with quote

30 seconds Google search

Quote:
Cruising at 70mph on a motorway is 8500rpm in top gear (redline is at 10,500rpm)


https://www.bennetts.co.uk/bikesocial/reviews/bikes/suzuki/suzuki-dl250-v-strom-2019-review-price-spec

So yes, 60mph at 7,000rpm sounds about right
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 13:55 - 14 May 2024    Post subject: Reply with quote

Well, the redline is what 10,500? So it's not absolutely spanking it. For reference my VFR750 has a redline at 11500 and at 7k it's barely into the power, maybe 100mph in top, you'd probably downshift one or two gears for a spirited overtake.

Some of the older inline 4 250s from the 90s' would probably be chugging and kangarooing if you let the revs drop as low as 7,000.

They aren't like cars. The redline is where you have to upshift, not an indicator your engine is about to blow up.
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flyingcbf
Renault 5 Driver



Joined: 23 Aug 2021
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PostPosted: 14:32 - 14 May 2024    Post subject: Re: 7000RPM @ 60MPH? Reply with quote

Ste wrote:
flyingcbf wrote:
Hi All,
Is it normal for a 250cc bike to have such high revs?
Cheers Thumbs Up

What bike is it and what gear are you in?


2019 Suzuki V-Strom DL250 and on sixth gear. I didn't want to go to 70MPH as I think it's too much for this 250cc engine?
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WD Forte
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PostPosted: 14:46 - 14 May 2024    Post subject: Reply with quote

Just got back from the MOT on the 250 scooty and had a flit aboot to celebrate.
I went on the M32 to test out the recently fitted tacho as I was curious about the revs the thing cruises at compared to peak torque revs
to guestimate its most economical cruising speed
and guess what? 70mph @ 7000 rpm ( ish)

Seemed normal for a 250 to me,
I recall the old CX500 would do 70 ish @ 6,000 ish
and even that felt busy but I was comparing it to a deisel car which
would do 70 @2250ish rpm
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flyingcbf
Renault 5 Driver



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PostPosted: 15:40 - 14 May 2024    Post subject: Reply with quote

Yes, this 250cc does feel rather busy at 7000rpm doing 60mph. I think I'll stick to this speed as max, don;t want to overburden this small engine. Besides, If I need to get somewhere, I'll just plan ahead.
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 16:04 - 14 May 2024    Post subject: Reply with quote

Fuck sake.

It will do 70 with no risk of damage to the engine. Of course it sounds busy, it has a small fucking engine so needs to spin fast enough to create the power to do that speeed.
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Easy-X
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PostPosted: 16:21 - 14 May 2024    Post subject: Reply with quote

Dare I say... eat less pies?
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WD Forte
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PostPosted: 17:00 - 14 May 2024    Post subject: Reply with quote

Easy-X wrote:
Dare I say... eat less pies?


What ?
Is you sayin' he's a right fat bastard?
OMG thas so rassis
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pdg
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PostPosted: 17:28 - 14 May 2024    Post subject: Reply with quote

Nobby the Bastard wrote:
Fuck sake.

It will do 70 with no risk of damage to the engine. Of course it sounds busy, it has a small fucking engine so needs to spin fast enough to create the power to do that speeed.


Gotta be honest here:

This.


Also.


A 50 sounds busy doing 30.

A 125 sounds busy at 50.

A 250 sounds busy at 70.

A 500 sounds busy at 110.

A 1000 sounds busy at 150.

See a pattern here? Double capacity does not equal double speed.



(Oh, and an 1868cc harley sounds busy sat still, idling, eating it's own valves...)
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andys675
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PostPosted: 17:45 - 14 May 2024    Post subject: Reply with quote

my old CB250RS did 10mph per 1000 revs in top

so 60mph was 6000rpm

quite handy if the speedo or tacho cable had broken
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that_impulse_guy
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PostPosted: 10:06 - 15 May 2024    Post subject: Reply with quote

my little 400 does just under 1k/10mph...70mph is about 6700rpm in 6th gear.
it'll do 14k if I forget to upshift before.
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Fat Angry Scotsman
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PostPosted: 11:14 - 15 May 2024    Post subject: Reply with quote

flyingcbf wrote:
Yes, this 250cc does feel rather busy at 7000rpm doing 60mph. I think I'll stick to this speed as max, don;t want to overburden this small engine. Besides, If I need to get somewhere, I'll just plan ahead.


If my Chink 125cc survived me for three years with me giving it full spank constantly on the motorway then your Jap 250cc will be fine with it too.

Wring it's fucking neck out mate and stop being a pussy. You're doing the equivalent of not shagging your misses cuz you're thinking about how slack she will be for the next guy Rolling Eyes
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P.
Red Rocket



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PostPosted: 13:01 - 15 May 2024    Post subject: Reply with quote

Rev it son, my Varadero 125 used to sit at the rev limit 80 miles a day, absolutely 100% at the limiter killing it every single day for 2 years.

Engine was fine at 77,000 miles when I traded it. Just service it properly.
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stinkwheel
Bovine Proctologist



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PostPosted: 18:38 - 15 May 2024    Post subject: Reply with quote

Not spanking its arse enough is probably why it had emulsified oil. Not getting it hot enough to drive off the condensation.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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pdg
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PostPosted: 18:58 - 15 May 2024    Post subject: Reply with quote

Fat Angry Scotsman wrote:


Wring it's fucking neck out mate and stop being a pussy. You're doing the equivalent of not shagging your misses cuz you're thinking about how slack she will be for the next guy Rolling Eyes


But but but, reeeeessssaaaaaale Laughing
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Fullers1845
Renault 5 Driver



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PostPosted: 13:38 - 20 May 2024    Post subject: Reply with quote

flyingcbf wrote:
Yes, this 250cc does feel rather busy at 7000rpm doing 60mph. I think I'll stick to this speed as max, don;t want to overburden this small engine. Besides, If I need to get somewhere, I'll just plan ahead.


Don't fuss over it, my cb125f will sit all day long at 8K (unless going uphill or a big headwind lol) until I get bored, fall asleep and crash.

As long as there's enough oil in it and it's been mechanically looked after there won't be a problem.
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