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"BLACK DIAMOND" HIGH PERFORMANCE<br />
STAINLESS STEEL VALVES BY PRECISION<br />
MACHINING<br />
Precision Machining Black Diamond one-piece<br />
valves are made from superb quality stainless<br />
steel and machined to a profile that provide<br />
excellent flow characteristics. These<br />
lightweight valves are <strong>the</strong>n impregnated by a<br />
very special process .002" deep and a<br />
surface build up, to improve wear properties<br />
and reduce friction. This process provides<br />
resistance to corrosion and wear superior to<br />
that developed by hard chromium and electroless<br />
nickel plating. Most valves are available<br />
in ei<strong>the</strong>r stock size with stock or thin stem<br />
and with larger head diameter for <strong>the</strong> high<br />
performance engine builder.<br />
Fits 2002 to present V-Rod models<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
750530 in. .2348" 1.575" 18664-01K<br />
750531 ex. .2344" 1.360" 18663-01K<br />
Fits 1970 thru 1985 Ironhead Sportster<br />
models<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
232388 in. .309" 1.935" 18070-70<br />
232389 ex. .3384" 1.570" 18033-80<br />
232390 in. .309" 2.000" Over size<br />
head<br />
232391 ex. .3384" 1.630" Over size<br />
head<br />
F i t s 1 9 8 6 t h r u 2 0 0 3 E v o l u t i o n<br />
Sportster 883 models<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
232402 in. .3100" 1.585" 18031-86<br />
232404 ex. .3095" 1.350" 18030-86<br />
Conversion valves for 883 to 1200<br />
Sportsters<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
234200 in. .310" 1.715"<br />
234201 ex. .3096" 1.480"<br />
Fits 1986 Evolution Sportster 1100<br />
models<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
232392 in. .310" 1.840" 18023-86<br />
232393 ex. .3096" 1.615" 18024-86<br />
232394 in. .310" 1.940" Over size<br />
head<br />
F i t s 1 9 8 8 t h r u 2 0 0 3 E v o l u t i o n<br />
Sportster 1200 models<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
239302 in. .310" 1.710" 18023-87<br />
239303 ex. .3095" 1.475" 18024-87<br />
Fits Big-Twin 1936 thru 1947 (Knuckle-<br />
head)<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
239300 in. .3765" 1.750" 18071-36<br />
239301 ex. .3745" 1.750" 18081-36<br />
F i t s B i g - T w i n 1 9 4 8 t h r u 1 9 6 5<br />
(Panhead)<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
232381 in. .3765" 1.750" 18071-48<br />
232382 ex. .3747" 1.750" 18082-57<br />
F i t s B i g - T w i n 1 9 6 5 t h r u 1 9 8 4<br />
(Shovelhead)<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
232383 in. .3765" 1.950" 18074-66<br />
232382 ex. .3747" 1.750" 18082-57<br />
232384 in. .3765" 2.000" Over size<br />
head<br />
232380 ex. .3760" 1.780" Over size<br />
head<br />
232385 ex. .3747" 1.812" Over size<br />
head<br />
232386 in. .309" 1.950" Thin stem<br />
(see note)<br />
232387 ex. .3384" 1.750" Thin stem<br />
(see note)<br />
Note: Thin stem valves need special valve<br />
keepers (ZPN 234291).<br />
Fits Evolution Big-Twin 1984 thru 1999<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
232395 in. .310" 1.840" 18074-83A<br />
232396 ex. .3096" 1.615" 18082-83<br />
232397 in. .310" 1.940" Over size<br />
head<br />
Fits all Big-Twin Evolution engines<br />
from 1984 thru 1999<br />
234890 High Flow racing valve Intake."<br />
1.900" head, 28°<br />
234891 High Flow racing valve Exhaust.<br />
1.615" head, 29°<br />
Fits Twin-Cam 88 models 1999 thru<br />
2004<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
239427 in. .3106" 1.840" 18074-83A<br />
239429 ex. .3101" 1.565" 18085-99<br />
239428 in. .3106" 1.900" Over size<br />
head<br />
Fits Twin-Cam 88 models 2005 to<br />
present<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
750432 in. .2754" 1.805" 18074-05<br />
750433 in. .2754" 1.900" Over size<br />
head<br />
750434 ex. .2755" 1.575" 18085-05<br />
750435 ex. .2755" 1.630" Over size<br />
head<br />
THIN STEM VALVE CONVERSIONS FOR TWIN-<br />
CAM MODELS<br />
Lightweight titanium valves for High<br />
Performance applications in Twin Cam<br />
models. These valves feature 7 mm stems<br />
and must be installed with matching valve<br />
guides and valve spring kit. Valves and valve<br />
guides are sold individually, valve springs are<br />
sold in a kit including your choice of steel or<br />
titanium collars.<br />
Thin stem conversion valves for Twin-<br />
Cam 88 models 1999 thru 2004<br />
ZPN Type Stem Head OEM<br />
dia. dia.<br />
750532 in. 7.0 mm 1.900" Thin stem,<br />
over<br />
size head<br />
750533 ex. 7.0 mm 1.565" Thin stem,<br />
over<br />
size head<br />
Thin stem conversion valve guides for<br />
Twin-Cam 88 models 1999 thru 2004<br />
Guides are sold each and come complete with<br />
matching Viton seals<br />
Intake Exhaust Size<br />
750545 750550 Std. (.5620")<br />
750546 750551 +.001"<br />
750547 750552 +.002"<br />
750548 750553 +.004"<br />
750549 750554 +.010"<br />
Continued on next page<br />
18 · Z o d i a c R a c i n g S h o p O c t o b e r 2 0 0 7
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