more on the proposed 500 Mito

Apparently you can show your support for a 510 Husky single in Mito
running gear by emailing

THere are also a couple of articles on same:

http://www.motorcycledaily.com/19december06_mito500.htm
http://www.cycleworld.com/article.asp?section_id=3&article_id=271

80 horses, 140kg, could be fun....


Zebee

 

Aye, but the downside is that it wouldn't be noisy, smokey, anti-social
and the yanks would be able to have it. ;-)

regards,
CrazyCam

 

2 stroke or 4 stroke ....im guesing 4 stroke

 

4 stroke single

 

v^2


BTH

 

With a dollop of v^4 and v^5

-----sharks

 

v^2 if the aerodynamic drag increase. The power required to achieve a
certain speed is force times velocity, so you're actually dealing with a
v^3 term there...

My first approximation result says that a bike can do 100mph with 30hp,
the same bike would do 120mph with 51hp (1.2^3 x 30). (it's only a first
approximation because there's an assumption that _all_ of the drag at
100mph is aerodynamic and will increase with v^2, so I'm ignoring
rolling resistance and other mechanical drag which doesn't neccesarily
go up with v^2)

big

 

KR1 has around that (50 odd at the rear wheel) and is good for around
the 120mph / 195K mark (allowing for speedo inaccuracy it claims to
break 200). Can't see the mito being any worse drag wise, and the
specs show it being a touch lighter on paper so I'd have thought if
they could squeeze 80 Hp out of the single it should be able to crack
200K fairly comfortably.

JL
(hell the raptor with way worse aerodynamics will do 150mph with 110
RWHP)

 

Yeah that'd be Corks alright.

Do you have any info on the Mito?

 

Or the law of dirtbike gearing making it onto the street single
unaltered... chances are that it'll just run out of revs in top gear at
that speed, not that it couldn't go faster if it was geared longer.

Mind you, the claim that this street-tuned 500cc single makes 80hp is a
bit rude; that would translate to between 65 and 70hp at the wheel at
peak. That's what an SV650 lays down with its extra cylinder and its
extra 150cc. For a 500cc single to match that, the state of tune it'd be
in would see its crankcases stamped with "FRONT TOWARDS ENEMY" or "AIM
AWAY FROM FACE"...

 

My xt with running drinking fluid and silly compression gets pretty
close .( plus a bore kit)

 

Well (mostly) yeah. The dirt bike single they're starting with has
service intervals measured in hours, so upping the capacity a wee bit
and pushing the cam timing,inlet dimensions and efi at the HP vs
torque end of the spectrum means the claim is quite achievable.
Probably more reliable than a 2 stroke too

JL
(I wouldn't mind having to change the oil every ride if I got a super
light weight in 916 clothes pushing out 80 ponies, I'd be sitting in
the queue outside whatever venue was necessary at 3am....)

 

[Nods in agreement]
Same as my underpants!

 

So which is it, 'Front towards enemy', or 'Aim away from face'?

Yours, Confused.

 

Have you seen the latest AMCN with the article about the Terra Modena
198? They're claiming "Over 41kW" (~55hp) from a 449cc single, with the
article text saying it's probably 43kW (~57hp). (It looks pretty sweet,
but then they're asking ~32kAUD for it so it'd want to be...)

I'm not sure what the state of play in enduro/dirtbike motors is these
days (google suggests 43kW/57hp for a WR450) but 45kW/60hp from 500cc is
slightly under the specific output of a Spada (25kW@12k rpm from a 249cc
twin), and is well under what the 4 cylinder 600 supersport class is
achieving - admittedly the 500 single is claiming peak power at only
9500rpm where the Spada is reaching 12k rpm and the modern 600's are at
least lying about getting up over 16k... I'm not sure what rpm the
current crop of litrebikes are making their ~160hp, but I'd bet it's not
too far from 9500rpm. A single won't be able to take advantage of some
of the 4 cylinder motors tricks (mainly careful exhaust system design
and multi cylinder exhaust pulse tuning techniques), and it'll have
balance issues (or balance shaft losses or both), so like you I'm
unconvinced about the reliability of an 80hp 500 single, but I'm happy
to believe maybe 60hp with a not-too-much-worse-than-a-Ducati kind of
service schedule...

(Oh, and let me know when you're in town next IK, you'll probably want
to borrow my copy of
http://www.amazon.com/MotoGP-Technology-Neil-Spalding/dp/189361879X )

big