Aside from the usual blather of 'why not just get a bigger bike' im only asking this question in conjunction to the fact i love the vfr, its make up and everything about it, although would settle for it being a bit faster....

any chance of some info on fitting one, if it is at all possible without blowing the engine to smitherines?

a pipedream at heart at the moment but i understand stronger maybe forged parts would probably have to be used.

i think its a an interesting topic, im not looking for an extra 100bhp or something completely irefutable, more like a unit with a low level widespread boost output maybe to perk up the performance through the entire rev rage..?


thourghts gents?

Ofcourse its doable, I think its been done.
Look at the mods people have done where they converted their VFR to fuel injected, using megasquirt or other DIY EFI controllers.
I recently saw a page where the guy had titanium 450cc pistons made with titanium rods. maybe you'll also need upgraded valves.
checking those mods out would be a good place to start. you'd need to think about what turbo you want, how you're gonna fit the turbo and the plumbing in, intercooling. depending on how much intercooling and boost you go for you'll need to drop the compression ratio. the VFR is already a slut to work on with its limited space hehe, try adding a bunch of components and pipes :)
you might also need to consider an electrical system upgrade since you'll need a fuel pump with decent pressure which is gonna draw more juice, unless u want to run without a headlight.
you'll find a lot of people here interested in the project if you do it, but its gonna be a long road I reckon.

you would be better set looking to supercharge the bike as making the exhausts work for turbo application would be bloody tough.

There is a guy in America that supercharged a VFR800. Don't see why this cannot be done to the 400.

Would not be cheap and at the end of the day the bikes are about corner speed, not drag racing.

Anyone found anything documented about converting the NC30 to FI?

Its definitely on my list of stuff to do.

The idea of some sort of 'charger crossed my mind when I was wondering about using the vfr800's injectors and possibly other bits which in my thinking would mean I would have specced the fueling in such a way that in the event of some sort of forced induction came to light the injectors could provide in theory 80% when the supercharger does its thing.

I just think your crazy tbh. Keep it as a pipe dream, its going to cause you LOTS of hassle, and LOTS of money problems in order to get your VFR400 Turbocharged, or even Supercharged for that matter.
Yes it would be very nice to have it done, and i would love it just as much, but realistically here, come on?!! Its just pointless!

Am I right in thinking you havent had the bike long?

OK, OK, so assuming you had a money tree...
Yes theoretically, the bike can be Turbocharged. You would need a small Turbo unit, Plenty of space for mounting it and the hoses, a completely new custom turbo exhaust made up. (Not entirely sure how you could do it so that the turbo worked off all 4 cylinders without wrapping the entire engine in Exhaust piping and manifolds though..) you would need to change the fuelling to run a fuel pump and have the inlets completely customised to fit a new inlet turbo manifold fitted. then you will need to change the ECU to run the correct mapping for the Fuelling, and thats going to be the hardest thing to set up tbh.
likewise, with supercharging, you need to find a way to tap into the Crank so you can run a pulley off it for the supercharger. The supercharger would fit very nicely between the banks of cylinders, but you would still need to re-design the inlets and probably raise them, and therefore remove half the underside of the petrol tank. Literally making the thing not viable as you would, at a guess, get about 35-50 miles before the thing uses a tank of fuel. So no long rides for you anymore! LOL

Your money would be better spent putting Copy, or even original HRC Spec F3 Parts on it, run an oil cooler etc, HRC Carburettors, Maybe a 444cc/(450cc Titanium) piston upgrade kit/Re-Bore, Lightened Crankshaft and Balanced, upgraded camshafts, an upgraded gearbox and of course a fully flowing exhaust complete system. Youd be looking at around 75-85 BHP with this sort of stuff fitted and set up properly. The bike has 58 standard, and trust me, you will notice every single extra pony the engine will be packing!!
Then reduce weight, cut anythng and everything off the bike that you dont need! Pillion pegs etc unless you carry one etc etc etc, or better still upgrade everything with newer lightweight parts. Wheels, Yokes, bodywork can all be made lighter and trust me you will feel the affect! then just get yourself some damn good training in and you will easily keep up with the 600's, with the engine mods, possibly the 750/1000's. Certainly on the corners thats for sure.!

In total, to really get good power out of an NC30, and probably get it as best it can be, you'll be spending over £15'000 no problems at all...


So, want to make it reality, or keep it a pipe dream? I'll be watching thsi thread keenly if you do.. LOL


Anyway, as for Documetnation for FI, Try here:
http://mngforce.typepad.com/nc450vdev/the-nc30.html" onclick="window.open(this.href);return false;

Lots of Info on there project bike and the Developments from ground up! Check out the list of Prototypes etc on the right hand side of the page.

there is also some more info about the 450cc Titanium Pistons and Rods here:
http://akhara.com/nc30/pistonrod1/index.html" onclick="window.open(this.href);return false;


Hope this has helped..

I do think more conventional methods of tuning would work better on the NC but sod it...why stick to the rules??? if thats what you wanna do but i think as mark said a super charger would be a better option. Do it mate, whats the worst that can happen???

Theres a member on here, micheal R, german fella thats fitting FI to his NC and judging by the quality of the rest of his bike i have no doubt it's going to work very well.

well guys heres the thing, the idea came about whilst talking to my dad friend about it all, who has, ironically, turbo'd a gsx-r 1000 k4 before nearly killing himself on it.. afterwards selling the bike for scrap and starting over with a normally aspirated bike...

ao, whilst on the subject of VFR400's he told me it would be a hard job as the bike was so small, doable yet rather pointless for the effort, so he did actually suggest supercharging, and with it being a V said it would fir between the cylinders nicely. Talking to a guy down my end whos been working on bikes sonce before i was even an itch in fathers pants (excuse the crudeness!) was going to have a look at the engine in more detail to see how if at all possible you could link the pulley to the crank and any other work which would be required.

money folks, is not much of an issue as i've just received some money of my ageing grandfolks. And, after paying off my debts is till have a substancial amount. Its not the fact i wouldn't like to go out and but a vtr or duke 749/748 it more the passion i have for my Vfr!

you guys think it would be a better idea to run this project through a different bike? I was thinking i could keep my one at present standard and buy a knacker (asthetically) but sound (engine) and do it from there. and i realize the amount of planning which would be needed and it would more than likely take an age to complete, but when its done....imagine the whine of the cams, and a supercharger?! awesome!


i can let you all know what my inside man has to say on the matter and how much it will cost...i was choosing the turbo/charger route as, what hamster said, forged pistons 450cc jobbies can be very expensive, and yes ive seen the site you featured a while back which cost those guys X thousands of dollers to sort it out...

i'll let you all know when i get more info.

time for some more research i think :)

thanks in the mean time fellas, will keep y'all posted.

Oh and by the way hamster, had the bike since april, but always bn interested in viffers. Had bikes prior to this one those being Honda nsr x 2, suzuki gsxr 600 srad, and a short spat on a honda cbr 600 f sport...written off before her prime and to Clarify...Not my fault!

http://www.vfrdiscussion.com/forum/inde ... opic=31492" onclick="window.open(this.href);return false;

get a brew and half a n hour and read that lot....superb

Or, you could go for the lightness options rather than power - it will all add up to the same thing but you'll have handling in spades too.

Kev on here - NC30V I think, has got Nitrous on his pimped the max NC30 - get hold of him, would be cheaper and optional extra stress

The stock internals wouldn't handle the power increase.

Pistons, rods or crank would soon fail, adding a fiar bit of cost to the project.

Turboing/supercharging the engine is great idea in theory, difficult in execution. It would be a hell of a lot easier if it were already fuel injected.


I'd sooner be dropping a TL1000s engine in...

Not again

400cc V4's are a tad different to your average chav tin top!

Happy to be proven wrong though!