Fuel injection for cv carbs

Found this ,it was designed for a vmax, which looks to have similar CV carbs, as long as the bore for the slide, and top plate are the same this kit will work.

http://roadstercycle.com/yamaha_vmax_fuel_injector_cv_car.htm

The main page of this site offers info on regulator/rectifiers as well as info related to running less modern bikes.

The megasquirt/microsquirt ecu was used in this example, and can be had as a kit with a bare board and components, right on up to a complete ready to go setup.

https://www.diyautotune.com

This will give you more consistent power, automatically adjust for weather and changes in altitude, better fuel mileage, smoother acceleration.

Throttle body adapter kit is $299
Microsquirt w/ short harness $330
Walbro 255lph fuel pump $110
Injectors 19lb/hr $100
O2 sensor $50
Tps, coolant, air -sensors $100
Fuel pressure regatta 43-55 psi $40
The above runs just over $1000 and I am sure I am forgetting something.

You can use your stock cdi or use the mega-micro squirt system to run coils of your choice - 4X COP coils anyone?

Not an Inexpensive setup but compared to the cost of a full carb rebuild, factory cdi boxes, factory fuel pump, etc. it starts to become a deal. Might be a better option for someone building a V4 from the frame up, or using a V4 in a go cart or dune buggy project.

I would love to upgrade my bike to fuel injection. If it were a better example of the VFF series fuel injection would be on the list for sure, but with damage to the engine cradle, front fairing, and chin guard, as well as hidden damage to the rear plastic, tweaked front fairing bracket, dent in the tank, etc. I would sooner get one of the last carbed 750's and do an efi mod to it.

Once setup one could sell all four Cv diaphragms ,and their fuel pump and offset the cost by around $200.

Once this setup was completed it opens the doors to adding boost, water injection, precision tuning of fuel curves.

Before taking on this project one would have to verify that the throttle body conversion kit would work with our CV carbs. I believe they have the same slide bore and top cap bolt pattern / seal.

Later
db

 

Funny, I would want carburetors on an FI bike, different strokes for different folks I guess. 1500 dollars to convert your "Busa" from FI to carburetors.

 

I like FI myself ... on a V4 anyways. Lolzz

PITA for tuning on a V4

 

I must be Old Skool then. I prefer the carbs on my ST or especially my VTR1000, over my 5th gen. The FI just seems snatchier than the carbs.

When the carbs aren't working right...then I'd prefer FI, which can tell me where a fault lies.

 

^unless you have to ante up a few hundred quid to fix the problem. I never like the way fi delivered power, from cars to bikes. Funny how the fuel management sections of the fsm are 200 pages compared to the carbureted books 10 pages. Its all in the name of making chit cheaper and taking control away from the people. eace:

 

Hey DEEBEE, I could have warned you about mentioning FI on a website where a lot of guys are running carbs. You're always going to get those responses, every time you post anything about FI. When I say these comments never stop, I really mean it never stops.

From my own experiences I can tell you that if you embark on a FI conversion of a VFR and you post about it here on VFRWorld you will be regularly (continuously) hen-pecked by the carb loving guys. Eventually your brain will automatically ignore posted comments that begin with things like: "I must be Old Skool then..." or "Funny, I would want carburetors on an FI bike" and etc.

Moving on...

I've done two complete and successful Carb-to-FI motorcycle conversions. On both projects I used the Microsquirt as the ECU (the Version 2 on the first project and the Version 3 on my second project).

The first FI conversion project was done on a 2005 Kawasaki EX-250 (the "baby Ninja"). I did this conversion in 2007 and the bike has been running great ever since, I still have it in my garage.

The second FI conversion project was done on a 1993 Suzuki GSF-400 (the "Bandit"). I started this project in the fall of 2013. I ride this bike all the time, cosmetically it is still a work in progress but the FI system has been running great since the fall of 2014.

I came here to the VFRWorld website about 6 months ago because I got interested in the Gen4 VFR. I was considering diving into yet another FI conversion project with a Gen4 VFR. Just like you I felt it would be a great candidate for a Microsquirt V3 FI system. I haven't pulled the trigger on this idea because I recently moved to Denver, CO and ended up with a slightly smaller garage space at the new home. Plus other things in life are demanding my attention right now.

You are located in Georgia which is great because you have Matt Cramer at DIYAutotune in Suwanee. I've been drawing on Matt's knowledge for almost a decade now. He has been very helpful to me both directly (via DIYAutotune) and with advice and attention on the MegaSquirt forums. I've never been to his business but I've made a lot of purchases off the website.

My main reason for doing my FI projects was that I love to tinker with engines. If planning/wrenching/tuning/wiring/etc. isn't "fun" for you I'd warn against this sort of project.

 

Converting a bike to Fi may be possible, but i don't believe it's practical or a good idea.

Unless you're riding up Pike's Peak and need the altitude correction, i don't believe there's any advantage of FI over carbs. Fi was added to meet emissions requirements, not for reliability or performance.

The fewer computers, sensors, and wires controlling my bike the better, imo


Buy a bike that has Fi as original equipment if you're so enamored.layful:

 

That's pretty cool. I would probably dismiss it right away, if I didn't see that it was from Jack at roadstercycles, but being as that is the case, this seems very promising. I am not really sure on any reason to do this, besides forced induction, but very cool nonetheless.