Riding a 250cc on the freeway?

"sharkey" wrote

Ummm, you need to have a conversation with the Japanese guy on a CT90
I met at Nullarbor roadhouse. A Cb 250 would be louxory by comparison.

Theo

 

And what is the relationship between the above lot and a CB 250?

Ummm, if you gear a CB250 higher (so it has less revs at 100 km/h) it
probably will no longer be capable of doing 100 km/h.

Perhaps. Or Perhaps?

Theo

 

[...]

We try to be nice about how we go about saying gofuggof, that's all. It's a
newsgroup thing, for farks sake.

j

 

In aus.motorcycles on Sun, 11 Jan 2004 13:25:47 GMT

Does Adelaide to Brisbane on the MZ count then?

Zebee

 

Blimey it *IS* pick on JL night !

No your weight doesn't change the gearing (yes I'll accept its a poor wording),
if you're fat it just won't be able to pull up to the top end of the rev range

JL

 

Absolute twaddle.
Get a bikini screen for it to streamline the airflow and you'll get it
up to 110 without the buffetting.
I owned a CD250u (same engine as the cb250 but with twin carbies)
I weigh 85 kilos and regularly got it to 130 kmh.

 

"Zebee Johnstone" wrote

Undoubtedly.

Theo

 

That's why you see a lot of 250cc b-doubles out there, its for the fuel you
know, and that explains why they are speed limited to 100k's as well

do a quick search on power to weight ratio's.

yes I agree, a fatter person would cause more wind resistance..

my vtr250 handled touring quite well, I did many 1000k+ trips on it and it
didn't complain one bit.. except when its 2 (180kg) up trying to get more
than 120-130 out of it..

www.mad-biker.com

 

I'll agree with your second sentence, but not your first. A CB250
would be perfectly adequate for a 40km highway commute, although how
fast it will get there is very dependent on the rider's weight. I
hear that Postman Pat rode his to the Capital rally a few days ago?

But then I'm planning to borrow my dad's CT90 for the trip to
Wintersun this year, so what would I know? ;-)


BTH

 

That's OK, I doubt you had much beyond 150kph on a ZZR250 anyway! ;-)

(I'm not being nasty, that's about what both my GPX250s can achieve).


BTH

 

Is this a subtle hint that I mention it too often?


BTH

 

They're a fine machine, no doubt about it. I'd own one if they were
cheap enough.

Breaking is always bad. Mind you, correct use of your brakes is often
a better solution than trying to "power your way out of trouble".


BTH

 

Well, I'm not sure I've ever done more than 6 or 7 hours continuous at
100kmh+ on the Spada (less then 2 hours if you don't ignore petrol
stops), and I've rarely done more than 3 1000km days in a row...

It all depends on what you mean by "long periods"...

big (Maybe Tony is a geologist?)

 

130 kmh? - whoa!, bet you dug up the spuds in that field in record
time ;0

Johno

 

(BT Humble) wrote in

This bloke will do anything for a rally prize!

Gary

 

205kg wet.

Gary (just browsing the owners' manual yesterday

 

.. a Honda CB250 to get to work every day. The

The stock CB250 is absolutely capable of this kind of application.
If you want more punch, rejet the carb or shim the slide needle.


http://autos.groups.yahoo.com/group/CB250_Nighthawk/

 

Not at all: I just figured you might be busy

-----sharks

 

I own a CB250 and occasionally ride it on the freeway (Syd to
wollongong) It is very happy at 80-90 will do 100klm/h and has got up
to 110Klm. Steep hills see it drop back to 80 in 4th gear. Its revving
fairly hard (and will happily do so all day) at these speeds. Its not
as smooth as a 4cyl but not unacceptably coarse. There is some
vibration from the engine at these speeds. I get tingly hands. having
never been on a big slow revving bike, I dont know if these are less
tiring.

It has no fairing and a very upright (and exposed to the wind) seated
position. This is not a problem in summer but you get very cold and
miserable in winter. The tank is low, and thus funnels cold air up
between yor legs and into your crotch hence frozen genetalia.

Around town, it is an excellent bike, very maneurble but for your free
way intentions including winter and bad weather, a comfortable faired
bike may be better. As I said, I dont know if bigger engine is better.

 

If you are going to get a CB250 for freeway use , then get bigger carby jets

This sounds very interesting, where does one obtain these jets from?
and who do you reccomend to do the work?