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22-07-2008, 08:53 PM
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#21 (permalink)
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CBR600RR7, 1.5x VJ22 RGV250
Join Date: Jun 2006
Location: Canning Vale
Posts: 10,201
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From memory, the oval pistons was an idea about getting more valve area for higher gas flow without increasing the cylinder count/capacity much.
It was a bit of a "hack" to get around rules (forget whether it was capacity or cylinder count), but yeah - didn't exactly work as well as planned.
As you can probably understand, I believe the oval pistons caused all sorts of interesting issues with regards to thermal expansion, etc.
edit:
Honda NR - Wikipedia, the free encyclopedia
Was cylinder count...
Quote:
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The final 500cc race version was capable of developing approximately 130bhp at over 20,000rpm.
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Not bad for a 500cc *4 stroke* ...
btw... the NR oval pistons have little to do with the VFR... not sure why they were posted up, but... 
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CBR600RR
R&G sliders, R&G tail tidy, HEL braided lines, ASV shorty levers, Akrapovic slip-on.
RGV250
Arrow pipes
New to riding? Or group riding?
Last edited by thro; 22-07-2008 at 09:18 PM.
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22-07-2008, 10:39 PM
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#22 (permalink)
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CB1300 & CBR1000F
Join Date: Jan 2004
Location: Your momma's house
Posts: 2,529
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I reckon we should make the RVF the M.A.D prize this year
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You can confiscate my bike when you pry it from my dead hands.
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23-07-2008, 10:55 AM
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#23 (permalink)
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Ducati 999R #0069, Laverda 750S, Italjet D180, Yam Jog
Join Date: May 2006
Location: Melbourne
Posts: 1,340
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Quote:
Originally Posted by g0zer
thats from wiki.. 190hp out of a V4 750, thats monster hp considering the 500GP bikes of the time were only putting out around that iirc.
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In peak race form. IIRC the street version had 130 odd hp. More could be unlocked with judicious application of a number of very expensive HRC components and careful reassembly. AMCN had an article of someone at the time who had one, with a fair few of those HRC bits. A guy I worked with back then had a ride on a standard one back then and said it went very well even in standard trim but the handling and brakes were sensational.
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23-07-2008, 01:48 PM
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#24 (permalink)
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CBR 954 RR
Join Date: May 2006
Location: Jane Brook
Posts: 2,906
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considering they are nice and rare round these parts, and they retailed for around the $90k mark when new, this isn't really a bad price at all........ if i had the money, i would lay it down in a heartbeat.......
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23-07-2008, 03:33 PM
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#25 (permalink)
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'93 Honda VFR400R
Join Date: Aug 2006
Location: Freo
Posts: 1,191
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Quote:
Originally Posted by Bulbous
considering they are nice and rare round these parts, and they retailed for around the $90k mark when new, this isn't really a bad price at all........ if i had the money, i would lay it down in a heartbeat.......
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$90k, don't think so... maybe the NR750...
the RVF750R was just under £18,000 when released in 1994, so about $38k Australian, plus a bit for importing and markup (still a seriously large price though).
NR750 was 5 million yen, or £38,000 which is between 50-80k Australian depending on which currency and which part of 1992 you look at...
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"...the people I had known who rode Honda V4s always had that odd little smile when they got off the bike..."
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23-07-2008, 06:48 PM
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#26 (permalink)
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Honda XR650R & Kawasaki Balius
Join Date: Apr 2005
Location: South Perth
Posts: 621
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Quote:
Originally Posted by Cbr1k
I reckon we should make the RVF the M.A.D prize this year |
I thought that the next M.A.D. prize has already been lined up?
Didn't Deej pick it up the other day?
Some funky looking and sounding red thing that took a year to get here, and is being personally donated by him?
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One owner. Only driven gently on Sundays. Sold to best offer. First to see will buy. Reward offered for safe return. Coming soon to a cinema near you. Available for a limited time only.
My waterbed broke this morning. Oh, I don't have a waterbed. Bugger.
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24-07-2008, 08:38 AM
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#27 (permalink)
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CBR 954 RR
Join Date: May 2006
Location: Jane Brook
Posts: 2,906
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Quote:
Originally Posted by Mockery
$90k, don't think so... maybe the NR750...
the RVF750R was just under £18,000 when released in 1994, so about $38k Australian, plus a bit for importing and markup (still a seriously large price though).
NR750 was 5 million yen, or £38,000 which is between 50-80k Australian depending on which currency and which part of 1992 you look at...
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now it depends on whether it really is an RC45 then, because i remember asking down at Causeway Honda when they were running the final year. they said retail on the RC45 was $90k-ish, and since they had one on the floor for a while, i am pretty inclined to trust them on the price......... that may or may not have included any extra HRC parts, but i am certain about the price......
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24-07-2008, 09:35 AM
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#28 (permalink)
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'93 Honda VFR400R
Join Date: Aug 2006
Location: Freo
Posts: 1,191
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Well, given the difference between (for example) US prices and what we pay for a bike here, I suppose it's not too unbelievable they would ask that price in Australia.
I saw this bike last year while snooping around causeways, couldn't believe what it was so I examined it closely, took down the VIN and it all checks out. It's a real RC45 alright, although the compliance plate says "VFR750FL"
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"...the people I had known who rode Honda V4s always had that odd little smile when they got off the bike..."
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24-07-2008, 12:29 PM
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#29 (permalink)
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CBR 954 RR
Join Date: May 2006
Location: Jane Brook
Posts: 2,906
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hmmmmmm, now, to figure out how to buy a house and this bike at the same time........
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24-07-2008, 05:10 PM
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#30 (permalink)
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Ducati 999R #0069, Laverda 750S, Italjet D180, Yam Jog
Join Date: May 2006
Location: Melbourne
Posts: 1,340
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RVF750 (i.e. RC45) was slightly more than the 916SP of the time. Nowhere near $90k. It's not a VFR750FL either - that's the regular VFR750 from 1990 I think.
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24-07-2008, 05:14 PM
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#31 (permalink)
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Yammies; 08 R6 & TZR250 RS
Join Date: May 2007
Location: Bee-leee-arrrrgh
Posts: 2,510
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That bike would be worth the money just for the noise it makes.
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25-07-2008, 07:29 AM
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#32 (permalink)
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2 strokes, please!
Join Date: Sep 2005
Location: Where da $$ i$
Posts: 3,428
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Ever heard a 1978 CBX-6 at full CRY (rpm)?
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25-07-2008, 10:38 AM
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#33 (permalink)
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Ducati 999R #0069, Laverda 750S, Italjet D180, Yam Jog
Join Date: May 2006
Location: Melbourne
Posts: 1,340
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Yes - Ouch! Put some mufflers on that thing Jamathi!
:-P
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25-07-2008, 11:49 AM
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#34 (permalink)
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Join Date: Apr 2008
Location: Leederville
Posts: 45
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I just saw a 600 f go through oxford street. thought it was this one
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25-07-2008, 11:52 AM
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#35 (permalink)
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Original Fireblade (plus a few other bikes...)
Join Date: Nov 2003
Location: Maylands
Posts: 2,901
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Quote:
Originally Posted by Quinn_11
I just saw a 600 f go through oxford street. thought it was this one
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Just so you know - a CBX-6 is not a 600. |
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25-07-2008, 11:56 AM
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#36 (permalink)
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2001 Ducati 748R
Join Date: Jul 2006
Location: Mexico
Posts: 17,302
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Quote:
Originally Posted by thro
From memory, the oval pistons was an idea about getting more valve area for higher gas flow without increasing the cylinder count/capacity much.
It was a bit of a "hack" to get around rules (forget whether it was capacity or cylinder count), but yeah - didn't exactly work as well as planned.
As you can probably understand, I believe the oval pistons caused all sorts of interesting issues with regards to thermal expansion, etc.
edit:
Honda NR - Wikipedia, the free encyclopedia
Was cylinder count...
Not bad for a 500cc *4 stroke* ...
btw... the NR oval pistons have little to do with the VFR... not sure why they were posted up, but... |
It was essentially an attempt at a "pseudo V8"
__________________
- 2001 748R - Ohlins suspension - Ohlins steering damper - 996 barrels and heads - Vee Two cams - Ported head by Vee Two to corse specs - Vee Two pistons - Vee Two enlarged valves - Titanium I beam conrods - Lightened crank - CF air box and tubes -60mm throttle bodies - 52mm termi system - Corse 4 post slipper clutch -
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25-07-2008, 05:35 PM
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#37 (permalink)
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2 strokes, please!
Join Date: Sep 2005
Location: Where da $$ i$
Posts: 3,428
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V8 motorbikes!
Yes they were arround even in GP racing
Moto Guzzi had a beauty! covered with a "dustbin" fairing!
and driven by a good old Aussie!
And Laverda made a wonderfull V6 endurance racer
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26-07-2008, 09:58 AM
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#38 (permalink)
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Join Date: Apr 2008
Location: Leederville
Posts: 45
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Quote:
Originally Posted by Spock
Just so you know - a CBX-6 is not a 600. |
I was talking about the Bike at the start |
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