Winter project...8th gen VFR!

I was thinking that as a group we could put our heads together to build a better vfr for the 8th gen from the ground up. Not just I want...I want...I want... but a realistic give and take of features geometry and asthetics that could be produced to our market at a reasonable price(Under 13K unless anyone objects). Of course a V4 motor, sport/touring capability and single sided swingarm are manditory but everything else is up for grabs. You guys that are good at photoshop are going to have a ball with this! Techs... Now is your time to shine! Riders, you are the heart and soul of what this is all about!!!

We will have to break this up into stages and I am not sure where we should start.

A.Chassis
B.suspension
C.engine
D.drivetrain
E.accesories
F.body

This gives us just over 2 weeks to make a decision on each of these 6 headings... Where do we start for phase 1?

 

start off at the engine. 5th gen 98/99 with the toro charger.

definitely need inverted forks and radial brakes. and the added bonus of the delink.
wait toro's doing this right now...

My '98 Gets Some New Suspenders... - VFR Discussion - Page 2

ohlins rear shock

as far as exhaust... some one needs to get a hold of one of those 2bros left exit full exhausts, and reproduce them in titanium, and maybe a few millimeters larger piping overall...

then some modern skin to wrap it all up. :thumbsup:

 

Optional throttle response curves. I figure if it's high-tech (FlyByWire throttle), you can select from a variety of throttle response curves like one to simulate a carbed bike like my girlfriends '93. Another would be like my '98 FI, if you're hot on VTEC, a one for that, a cruising curve with good speed stability at hwy speeds, a city curve for slow traffic work...

 

I like that idea! programible fly by wire if nothing else to make the throttle more or less sensitive.

 

The gas tank need to be 5.8 or larger If you can move the gas tank to center body like BMW that would be sweeeeeeeeeeeeet.
Sharf driven .......

 

All good Ideas but the idea is to build a new CG vfr bike not a modded previous vfr and remember we are trying to make it affordable Toros charger alone on a stock 5th gen puts us near our top budget. For example if we were to start with the engine my suggestion would be:

1000cc
V4
slipper clutch
unicam similar to the 7th gen
V angle ???

basicly lower displacement, more compact, lighter version of the 7th gen motor without the duel clutch.

 

How about if we stored extra fuel in the frame like some of the buells along with the tank so the tank itself would nothave to be gigantic to store 6 gallons or so? how about a pic of the bmw scuba so I could get a better idea of what you are talking about. I personaly like the shaft drive but it does rob power and it is heavy. Any of you guys care to take a shot at a lightweight virtual shaft dirve? There is always the tried and true chain system or beltdrive also. we will all have to discuss pros and cons of each when we get to the drivetrain

 

on the pc5's you can toggle between maps, fuel maps, but ignition and throttle maps would be a little trickier.

 

well if super chargers are excluded, due to price, we are gonna need more cc's or more compression. (radical cam timing and valve train mods aren't gonna be cost effective)

to get added compression, you're not gonna be able to mill the heads on any thing but a 6th gen, which has cam chains not gear driven cams.

or we could get one of the vf1000r engines for more cc's and build that up. im not sure if these are running timing chains or gears or what, but ive heard of people pulling 125 plus horse to the wheels outta these...

id personally like to get a 6th gen. port polish and mill the head. due a 6 angle valve job. see if we could figure out how to degree the stock cams a little more aggressively.
also if possible there could be some over bore options, like 919 929 or 954 pistons. i also saw the big bore kits the 5th gens...

 

start with Aprilia RSV4 engine

 

I think the frame fuel cell is good. carry a bit more petrol. handle bars change to the risers and raise the windshield a tad.. the 1000cc good idea. and trick out the computer.... I like the gear driven cams.go to that it would get rid of the chain tensioner problem.

 

After doing a little research I think you hit the nail on the head for what everyone participating so far has sugested engine wise. I think we could all live with this as a powerplant:



2009 Aprilia RSV4 - Press Release Specifications


Engine
Aprilia 65° cc longitudinal V four stroke. Liquid cooled. Double overhead camshaft; four valves per cylinder.
Bore and stroke 78 x 52.3 mm.
Displacement 998.9cc
Compression ratio 12.8:1
Max. power at crank 180 HP (132 kW) at 12,500 rpm
Max. torque at crank 115 Nm at 10,000 rpm
Fuel system Variable height intake trumpets. Airbox with aerodynamic side intakes. 4 throttle bodes, 8 injectors, ride-by-wire fuel management. Multimapping

http://www.sportrider.com/features/146_0904_aprilia_rsv4_factory/photo_12.html

All in favor???

 

im not that excited about the rsv4 bikes anymore. apparently aprilia is having a hard time with consistency in the output of the bike. the press bikes have been ranging anywhere from 145 whp to 165 whp... on the same dyno!
i want to say it was motorcyclist, if not, cycle world which ran the article. their first press bike dyno'd 165. then the second bike they got only put out 145 ("only" 145 lol). so they told aprilia and aprilia delivered them a second bike, which put out 150 whp.
all aprilia had to say was that the american rsv4s should be putting out much more than 150ish and they were not sure what was going on.
im thinking that aprilia is working their assembly line guys a little too hard and they need to give them some vay cay time for a poontang break...

 

i dunno but the guys over at AF1 are building a beast from what i hear.. saw what you want but rsv4 rotax motor is a monstor in in own right

 

anyways get the aprilia, but dyno it before pulling it from the bike, to make sure it was put together tightly to spec...
but, didnt we already rule out the toro because of cost reasons?
how are we going to get our hands on a rsv4 mill for the cheap?
maybe find a wrecked or salvage titled rsv...
im pretty sure the rsv crowd is gonna be a little more mature and respectable of a crowd, than say your average busa boy... and they are a limited production bike, no?
who knows...

 

they are easily avalible for purchase from what i understand.. ( aprilia owner)..Falco though... i dont think any are probably ready for salvage as they just came out this year..

 

Alright... I think we are missing the point here. We are not building a bike out of used parts or parts necessarily built by a manufacturer. but making a design concept for a new bike without the restrictions of copyright. When I sugested O2s recomendation to use the rsv4 motor I did not mean to order one from aprillia. I used it as an example as a working prototype that realistic power output and compactness could be achieved in that package if built by another manufacturer on a production line. Even though this is a very high end motor it could more than likely be tuned down 20% cost and powerwise and be a good base for our build. This project is completely intended to simulate what honda or another manufacturer would do at the design stage. All options are up for grab if they are realistic.

 

All doable in our project!!! :thumbsup:

 

Of couse that would never happen in our shop:biggrin:

 

can you post some details so we might be abe to decide on a base motor?