Table of Contents
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EVO: Carburetor, Intake Manifold & Exhaust
Intake Manifold
HD Sportster Manifold and Parts | ||||||
Year Model | Intake Manifold | Flanges | Intake Seal (2) | Carb Insulating Spacer | OEM Carb Keihin “Butterfly” non-CV |
|
Front | Rear | |||||
86-87 | 27004-86 sold individually | 27009-86 | 27010-86 | 26995-86A | 27003-86 | |
flange upgrade (Late 1986) | insulator upgrade (1988) | |||||
27009-86A | 27010-86A | 27003-86A | ||||
flange upgrade (1989) | ||||||
27009-86B | 27010-86B | |||||
Year Model | Intake Manifold | Flanges | Intake Seal (2) | Carb Seal | OEM Carb Keihin “CV” |
|
Front | Rear | |||||
88-89 | 27004-88 rubber intake sold individually | 27009-86A | 27010-86A | 26995-86A w/ insert (2) 29049-88 | worm clamp | |
flange upgrade (1989) | ||||||
27009-86B | 27010-86B | |||||
90-03 | 27004-88A aluminum intake (27004-89) sold as kit with intake and carb seals | 27009-86A | 27010-86A | 26995-86A | ring seal 27002-89 |
|
04-06 | 27024-04 aluminum intake sold as kit with (map,seal,clip & screw) | 27009-86A | 27010-86A | 26995-86A | ring seal 27002-89 |
90-03 Intake Manifold (27004-88A)
Subdocuments
Sold as a kit with intake and carb seals.
04-06 Intake Manifold
07 and Up Intake Manifold
2007-up (EFI) heads have a wider bolt pattern for the intake flanges. 1)
It's easier to get to the bolts on 07 and up intakes.
All the 2007+ heads have their manifold mating surfaces milled down about 1/16“ as compared with carb type heads.
If you were to try and put the carb type intake manifold on an 07 engine, you'll find it needs to be about 1/8” wider.
If you don't get a wider manifold, there's a good chance you'll have issues with the seals being sucked into the intake ports on decel.
Intake Flanges
Seals
90-03 Intake Seals
1)
aswtacing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5716946&highlight=intake+manifold#post5716946
2)
photo by 4-pac of the XLFORUM http://xlforum.net/forums/showthread.php?t=254258