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CVO Technical => Intake/Exhaust/ECM => Topic started by: Rimjam on April 04, 2014, 01:57:31 PM
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I'm posting my question in this thread thinking more people with knowledge of the classic SERGs will see it. Moderator - if this needs to be moved to the INTAKE thread it's your choice.
I recently scored an MM fuel injection unit at a swap meet. I noticed the plastic tops on the injectors were not orange like on my SERG or the spare unit I've had for a few years. The guy selling the unit said it was from a cop bike so the injector tops were black - they put more fuel in the engine so it wouldn't overheat as quickly doing urban duty. Was he shooting me a line of crap? I can't find a part number for injectors on a 2000 police model to compare with my part number (27135-97). Any knowledgable ex or current wrenches out there? Comparison photos below.
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Very interesting question. Moved to get you more responses (and you are right, it is an intake question).
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This is from recollection only. I could not find a reference for a different part number for injectors on cop bikes in any parts manual here or the online catalogs. I also don't recall seeing different injectors on a few old cop bikes I've worked on.
This stuff is now approaching a decade and a half old. So the recollections aren't absolute. But I don't recall what you're being told.
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I don't recollect what I had for breakfast, much less what Harley did on cop bikes in 2000. The parts catalog only shows one injector part number for all 1999-2001 Big Twins with MM-EFI, including the SERG (27135-97). Any supposed change for the cop bikes would have been in the calibration, not the hardware.
The information I've seen elsewhere makes me think that guy may have sent you a TB from an Evolution bike. The SE catalog for those bikes had an upgrade that included higher flow orange (or red) injectors. I think that higher flow injector eventually became the stock injector when they went to the Twin Cam engines in '99.
See if you can read a part number on the orange (red) and black injectors. The stock injector for the 1998 Evolution bikes was 27218-95, and the stock injector for the '99-'01 Twin Cam bikes was 27135-97. The 27218-95 is a lower flow rate injector.
Jerry
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There were three sets of injectors used in the MM units. Red top, Black Top and Green top. Now if I could just remember the flow of each of them you would be set. I think that Black were the most common ones.
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Found this on a different site, not sure about accuracy:
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27135-97 (green/red) fits '99-'01 FL and is 29Lb/Hr
27218-95 (black) '95-'98 FL - 21Lb/Hr
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Jerry
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Here are the Weber part numbers off of the injectors and there colors
Black = IW720 1057/00
Red = IW724 1170/00
Green = IW724 1057/00
If you chase down the part numbers I think you will find that the Red and Green flow the same BUT have different spray patterns. The Black will have a different flow rate. I believe that the Black's were for the EVO's like Jerry has stated. The throttle bodies themselves were all the same as I recall BUT there was a SE43 high flow one for a couple years only. It used a different style injector. Back in the day that induction module was $1000! A stock one was like $1200 too.
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Manufacture OHM’s CC/Min Lb/hr
IW724 15.1 300 28.53
IW720 15.1 180 ???
From a quick internet search
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Thanks for input on my question. Checked part numbers on injectors I have - matched Steve Cole's numbers exactly. Internet search (Ronnie's H-D) lists only part number for one year EVO injector (1998) other EVO years list only module part number. The bottom line is; my 'cop' MM unit is actually a '95-'98 standard EFI part. Guess I just didn't get kissed on this deal. Anyone need an EFI for an EVO Bike?
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Remember every part of that Throttle body is the same except the injectors. So if you have a MM bike you could swap the injectors and use the rest of it.