TURN YOUR 1985 TO 2007
FIRST GENERATION V-MAX INTO A FUEL INJECTED, EASY STARTING, PROGRAMMABLE STREET
and STRIP MACHINE !!!
Or almost any other CV carburetor equipped motorcycle!!!
YOU MUST INSTALL A IMPACT, ROLL OVER, OR
BANK ANGLE SWITCH WHEN INSTALLING FUEL INJECTION!
By using batch injection principles
you can turn your V-MAX into an up to date
fuel injected superbike, and all for under $1,515.00
And keep your V-boost!!!!!
Check out the kit
install and Microsquirt/Megasquirt
Here's a few answers to fuel injection that I
A lot of people have been asking if they need a trigger wheel
for the Vmax. The answer is yes and no.
If you run a batch injection setup like I am on the Roadstercycles the answer is
no. All you have to do
is use the negative side of the #1 coil to control the Megasquirt ECU injection
timing. Simple, easy, and
works excellently. Batch injection means that you just inject continuously
like almost all throttle bodied cars built by GM and other car manufacturers.
You just adjust your fuel injection as needed. Sequential fuel injection means that you have crank
triggers and or cam triggers so you inject fuel exactly at the right moment when
the intake valve starts to open. More sensors, more work, more money. The guys
at Megasquirt actually set up a car both ways and realized the extra time and money
was not worth the added performance gain which was negligible. I thought about going both ways and decided to keep it simple.
I am jazzed at the performance and setup. I hit the starter button and I'm gone.
I hope this helps. Also, all fuel injected vehicles
have some sort of safety device for shutting off the high pressure fuel pump in
case of an accident or lay down. This is something that needs to be added to
your EFI project for your own safety and the safety of others. Don't just
Below is a throttle body conversion set up that I developed
for the '34 Roadstercycle and
any Vmax motorcycle using stock CV carburetors. If you would like to see the
kit in action go to Youtube
and check out my videos. Yes, we have applied for a Patent for the
conversion of motorcycle CV carburetors into fuel injection throttle
A Vmax throttle body conversion kit is $199.00 on sale!!!
I do all the machining myself, in my shop in the U.S.A.
The kit does not include injectors, electrical components,
fuel pump, regulator, ECU, etc. It only includes what is in the
throttle body kit picture which will convert your stock
Vmax CV carbs into throttle bodies. Installation
With a Megasquirt system
like I used you can have a Full Fuel Management
System!!! Race, Street, Turbo, Blown, Nitrous, Rev limiter, water injection, and even spark! I would start with just fuel injection first to
get familiar with all the settings and how everything works. Make sure you read everything
and get familiar before starting your project. The pictures below shows
my fuel injection installation on the '34
Roadstercycle. On a stock Vmax engine with a stock air box you would position the
fuel block and lines differently to accommodate your particular look and needs.
Since I travel to different shows I kept the fuel pressure regulator, fuel pump
and ECU visible to be able to show people what parts and pieces are needed to
run an EFI system. You can hide a small pressure regulator somewhere and a fuel
pump with a regulator built in can be put in your fuel tank. This takes some
work but it can be done. That would be the cleanest setup. You will still have
to hide the Electronic control unit which are different sizes ranging from the
size of a pack of cigarettes (Microsquirt) to about the size of a VCR
tape. This install has the VCR size unit. (Megasquirt I ).
The above 2 pictures are of the new Microsquirt ECU. This is the newest way to
go. Small, compact design
that comes with a 3 ft. wiring harness and a serial port connection for programming
through your computer. Size matters and smaller is better for motorcycles. This
unit is $400.
is a 2004 Honda 600RR in tank fuel pump. It has a built in regulator with the
correct pressure and flow for tuned port type injectors. It even has a fuel
level sending unit built in. (the wire with the black square) You could also use
this if you purchase the correct fuel gauge. Homework time again. This fuel pump
assembly mounts in from the bottom of the tank. There are others that will mount
in from the top. This was an Ebay item that I bought for around $40.00 just to
take a look at it. It was like new. This is definitely a good way to
Cost of a typical fuel injection installed on a bike:
- EFI control units $200.00 (you build it from a kit) to approx
$750.00. Mine was a $300.00 kit.
- External 90 psi. fuel pump around $125.00 you can buy used
motorcycle internal pumps (Ebay) and install them in your tank and they usually
have fuel pressure regulators built in. Remember port injectors take about
45 to 53 psi. Again do your homework for the correct pump.
- External fuel pressure regulator $30.00 to $100.00 You need one that
regulates down to 45 to 53 psi.
- Fuel injector hose, rubber about $3.00 a ft. If you want the pro
look with stainless hoses it's going to cost a lot more,
so do your homework. I just paid $18.00 each for "4" 1/8"npt to -4
stainless hose fittings.
- Extra fuse panel. $15.00 to $75.00 Again that's up to your taste. I paid
$65.00 for a really nice one. Main fuse, fuel pump fuse, 2 fuses for the 2
injector banks, ECU fuse.
- Electrical wiring. I'd figure a $50.00 if you do your own wiring. Most of
the ECU control unit people have harnesses you can buy. This is a nice clean
way to go and quicker than you wiring it.
- Injectors about $50.00 apiece, I use 19 lb. Bosch type from a Ford
mustang. Remember we are talking about port injectors not throttle body
injectors. I use port injectors to turn your CV carbs into Throttle
bodies! Motorcraft PN# is E5TE-A3B It will cross over to different part
numbers for more flow if you need it.
- Air, coolant and oxygen sensors. $100.00
- Throttle position sensor $60.00
- Extremely important is a rollover switch or bank
angle switch.. In case of an accident this would or should shut off the high
pressure fuel pump so fuel would not be pumped uncontrollably if a fuel line
or injector would be ruptured. This is a necessity not a suggestion.
So quick middle of the road addition here; This is just an approximate,
DO YOUR HOMEWORK!
Bank or Rollover switch
$100.00 (This is very important in case of an accident, it shuts off
the fuel pump)
(remember you can pay more or less if you can solder and use a meter)
$50.00 (it will be more if you buy one from the ECU sellers)
$200.00 Motorcraft PN# is E5TE-A3B (I've found them rebuilt for $22.95)
Coolant temp sensor $15.00
$50.00 (unheated) Read about heated and unheated O2 sensors.
Throttle position sensor. $60.00
My CV to TBI
$199.00 Kit instillation instructions
$1515.00* (With my CV to TBI kit.)
*If you don't use mine you have to add on some type of throttle body setup. Here's what I
GSXR throttle bodies from $50.00 to $300.00 on Ebay, you have to split
them apart, make manifolds to mount them since they are not spaced correctly for
the Vmax. Build throttle linkage, redo the fuel lines, since you just cut them
in half. Unless you have a machine shop or a friend with a machine shop it's
going to be quite a project. I have a full machine shop and I didn't want to do
it. The good side is that the GSXR throttle bodies usually come with a throttle
position sensor. So the bottom line is this, EFI is rather expensive to add on,
I thought about it long and hard before I decided to do it. But now that I have
I've realized it's the only way to go to revive the Vmax!
If you are going to build a pure Dragbike then you should check out Wildbros
around $5000.00 for a full management kit or Extrudabody
to put together a set of throttle bodies from pieces. You still have to build
manifolds if you buy Extrudabody parts. Both places sell very nice looking
units. Again and I can't stress this enough do your homework it will pay off in
I really hope I've helped sort out some of the mystery of add on fuel injection
for motorcycles. If you have any questions or thoughts feel free to
ask, I would love to hear from you and answer your question and post
them so others can learn more about EFI. email@example.com
Copyright by Fleming Engineering 2008-2013