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THE DRY SUMP PLATE FOR DELKRON
CRANKCASES
For those of you who want the option to suck
the oil out-of the lower end of the sump, this
fixture will allow you to get that oil before it
is thrown around the engine a couple of more
times, which makes for less drag on the
flywheels. It is made of T356-T6 aluminum
and bolts right up to all Delkron crankcases.
Comes complete with gasket, mounting
screws and 3/8" hose fitting. Replacement
gasket fits all Delkron sump plates including
dry sump plate.
231497 Dry sump plate
234073 Sump gasket (each)
DELKRON’S BILLET ALUMINUM 4 CAM BIG-
TWIN CRANKCASE
Strong, Stronger, Strongest, Here it is, "the
Crankcase Of The Third Millennium". It utilizes
the superior valve train geometry of a
Sportster but has the strength of the Big- Twin
flywheel assembly. The cam location is the
same as stock Evolution Sportster cases
from 1986 thru 1990, so all available cams
for this engine type will bolt right into this
case. The crankcase and cam cover are
made from 6061- T6 aluminum, which insures
uniform strength and hardness throughout. A
minimum overall case thickness of .400", a
left side case thickness of more than 1.250"
and almost .900" of case between the
flywheel cavity and the cam location surface
provides the most rigid flywheel support of
any crankcase available today. The drive side
of the case is machined to accept late model
Timken bearings for the 1 1/4" sprocket
shaft, while the pinion side is machined to
accept a single Timken and ball bearing
configuration in combination with an aircraft
quality high contact ball bearing for maximum
flywheel support. The oiling system is a dry
pump system with the scraper at the bottom
of the case and uses the more efficient late
model Sportster rotary type oil pump or any
type Pro-Flow Sportster pump for better
pressure and scavenge ability. We stock the
street version of these bullet-proof
crankcases, which accept our 4 5/8"
Flywheels and Sputhe cylinders. All other
combinations are possible, but are made to
order only. They can be ordered with cylinder
bore up to 4 1/2" O.D., cylinder deck height
up to 1" over stock and flywheel diameter
clearance up to 8 1/4", plus many other
options which are preferred. Please state
deck height, cylinder spigot size, flywheel
diameter, lifter block type and bolt pattern,
plus any other options wanted when ordering
a crankcase. We even can supply you a Full
Race crankcase, which features a solid left
side, without the cutout for the alternator
stator and without the facility for upper end
oiling through the lifter blocks. For the race
cases there is the option for extra heavy duty
1 1/2" sprocket shaft bearing size for use
with race type 1 1/2" sprocket shaft for all
out racing.
234075 Street version Delkron 4 cam
billet crankcase set for Sputhe
cylinders and 4 5/8" stroke
234074 Street version Delkron 4 cam
billet crankcase set (special
order)
234072 Race version Delkron 4 cam billet
crankcase set (special order)
Replacement parts
236250 Fafnir outer pinion bearing
236252 Taper bearing set for 1 1/2"
sprocket shaft
236261 Oil seal for 1 1/2" sprocket shaft
CHROME PLATED ALLEN BOLT KIT
232233 Chrome plated, high grade allen
bolts for all Delkron crankcase sets. Kit
includes all bolts that bolt the cases together
as well as the allen screws for the sump plate
JIMS "RACE ONLY" ROCKER SHAFT
This rocker shaft is made for racing purposes
only. It is completely drilled thru on one end
and threaded to accept a grease nipple.
Designed for race bikes using "dry top end".
For use in Evolution race engines only.
233384 Rocker shaft for racing purposes
ANDREWS TITANIUM VALVE COLLARS
232638 These titanium valve collars will fit
Evolution Big-Twins 1984 thru 1999, Twin-
Cam 88 models 1999 to present and
Evolution Sportster 1986 to present and
provide .050" more valve travel over stock
collars. Collars are not only stronger than
stock but are also 50% lighter and install with
stock keepers.
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