... to determine which fuel injection system is on your bike? I have a 2001 Road King which was registered in December 2001 so I'm wondering whether I have a Magneti Marelli system or the newer Delphi system. Is there a surefire way of telling?

 

There are a couple of active threads on this very forum in the General section which would suggest that you have a MM. Time for you to invest in a factory service manual.

 

Registration date doesn't mean anything old chap, date of manufacture is what you need, to confirm model year. That may be on a label on the front of your frame in the vicinity of the steering head. If your bike was made in August or later it is actually a 2002 model year, which AFAIK will make it the later Delphi. Which further confirms Veekness's wisdom, that you should be consulting your FSM! You could also check a parts website, which may help.

 

Quick and easy way is pull off your a/c cover and look at the intake throat. Delphi's are round shaped and MM's are rectangular-ish. Here's a pic of the MM.

 

Delphi has a single throat, MM has two

 

Thanks for all the replies fellas ...

Aha ... I'll check that out. Thanks!

 

Looks like an MM from the exploded parts diagram.

 

Dink, dink, dink, dink!!! We have a winner!!!!!

lolol

Good luck on the search!!

 

If I'm not mistaken, the MM fuel injection had 2 fuel lines connected to the fuel tank (feed & return). The Delphi system used in 2002 models only had one fuel line from the tank.

 

Bingo - even easier! Having adapted such a tank to carb I should have remembered that.