Motorcycle EFI systems

[R.Larson]

Gill Electronic R&D wrote:
> 
> Good morning diy efi!
> 
>     We are a small company currently developing a brand new efi unit
> specifically designed for mororcycles.
>     I  would be most grateful if any of your members could provide any
> information relating to the following:
> 1. Unit costs of efi systems Eg.Bosch, Weber supplied to individuals or
> large manufacturers.
> 2. Motorcycle model names (past &present)that had efi.
>   We at Gill R&D would be happy to help with minor efi teething problems.
> 
>                 Yours sincerely,
>                                         Simon Doyle
> ----------------------------------------------------------------------------
> ------------------------
> Gill Electronic Research & Development
> Solent House, Cannon Street, Lymington, HAMPSHIRE. SO41 9BR.
> Telephone :  +44 (1590) 679955   Fax :   +44 (1590) 676409
> E-Mail :  gill at gill.co.uk     Website :  http://www.gill.co.uk/index.html
Just freindly info if usefull........

My only experience with aftermarket units is with Harleys.

Currently the only advertised electronic units are the EXCEL and Mikuni.
Until reciently they both were in the $1100 to $1200 dollar range. Here
reciently they have dropped to about $850-$950.  They also control the
electronic ignition.  The AXCEL is/was a throtle body with only the very
minimum of sensors(throtle position sensor, Barometric pressure, MAP,air
temp).  The mikuni was a dual injector EFI with more sensor control. 
Also more expensive.

In a earlier post I mentioned that Harley's EFI is a throtle body.  This
was not to promote their system but to inform.  I see a need for an
aftermarket system which replaces the standard carb but still alows the
use of an independant electronic ignition.  Harley riders tend to
customize their bikes more than most other types of riders.  Each rider
tends to have his/her own ideas of the best ignition and since several
aftermarket suppliers already have programable curves and advances it
would allow you to enter the market at a much lower price while taking
advantage of the established base of electronic ignition controls
already on the bikes.  A typical performance carb will set you back
300-400 dollars so a market price of 500-650 would probably really
sell.  Possibly at even more.

On the Harley the dual injector sequential port EFI of the Mukini allows
for the individual tuning of each cylinder separately.  The rear
cylindrer typically runs at a different richness than the front.  By
tuning the cylinders it helps reduce the vibration and promotes more
power( AM I SAYING A HARLEY THAT DOESN'T SHAKE) NO. But less.  

Any way I hope this helps otherwise just forgive my rambling.