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"Billet" 67mm (890cc) Lightweight Wiseco Cycle X Pistons (K Models)
We are proud and excited to release
these Billet Wiseco pistons with our race proven 30 degree Cycle X domes.
Why Billet?
Without blanks
or forgings to achieve the race proven dome configurations, the pistons needed
to be billet and built from scratch.
Secondly, Billet pistons can be machined on the undersides to reduce even more
weight and run shorter wrist pins.
Conclusion, world class pistons for your five decade old hot-rod Honda.
These 67mm (890cc) and larger piston kits are a perfect match in displacement
and compression ratio for the Cycle X "Big Port" cylinder heads.
These pistons have a bare weight of
173 grams and have a Armor Glide skirt coating, tool steel wrist pins, XA
ring sets, .00190 piston to cylinder wall clearance, and larger and deeper valve
pockets for big valves and big camshafts.
Depending on the year or combustion
chamber modifications, the compression ratios are in the 11.5 ish to 12.5 ish range.
Your camshaft selection will affect or alter this figures.
Note: The compression ratios was determined
with the timing edge of the piston flush with the top of the cylinder.
Note: The cylinder heads are stock cc
combustion chambers without milling or surfacing and a .040 head gasket.
69-76 "K" model 22cc cylinder head combustion chambers will have approx 12.8
ish
ratio
77-78 "K" model 24cc cylinder head combustion chambers will have approx 12.1
ish ratio
Note:
Cylinders will require re-sleeving. Complete kits with sleeves
listed below.
ENP-BILLET890-K
$699.99
OUT OF STOCK - MORE COMING SOON!
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"Billet"
Cycle X 890cc 12.1 Piston and Sleeve Kit, 69-78 "K" Models
We are proud
and excited to release these Billet Wiseco pistons with
our race proven Cycle X domes.
Why Billet?
Without blanks or forgings to achieve the race proven
dome configurations, the pistons needed to be billet and
built from scratch.
Secondly, Billet pistons can be machined on the
undersides to reduce even more weight and run shorter
wrist pins.
Conclusion, world class pistons for your five decade old
hot-rod Honda.
Honda cb750 sohc models seem to love this bore size with
or with-out port work with great reliability
These kits are commonly used with slight combustion
chamber modifications and camshafts similar to the
CX-11 for best results.
Depending on
the year or combustion chamber modifications the
compression ratios are in the 11.5 ish to 12.5 ish
range. Your camshaft selection, milling, chamber
modifications and gasket thickness will affect or alter
these compression ratio
figures.
Why Cycle X sleeves?
Our cylinder sleeve are denser, harder and longer
wearing than any sleeve on the market. Most machinists
can hear and feel the difference when boring/honing the
cylinders.
Note: Cylinders
will require re-sleeving.
These
pistons have a bare weight of 173 grams and have a Armor
Glide skirt coating, tool steel wrist pins, XA ring
sets, .00190 piston to cylinder wall clearance, and
larger and deeper valve pockets for big valves and big
camshafts.
( For the "F" model version of
these pistons, refer to the F2
page. )
ENP-890-KIT
$869.00
OUT OF STOCK -
MORE COMING SOON!
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Big Bore Combustion Chamber Blending
This combustion chamber service will perfectly
match your larger cylinder bore to your combustion chamber.
This procedure is done to any bore size and is accomplished on our
milling machine and then hand finishing for extreme accuracy.
$129.00 (Parts and labor)
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Thermo
Barrier Coating
We are
reintroducing or reminding the public about thermo barrier coatings for
pistons and combustion chambers. This is the same coating used on our
vintage heavyweight super bike (AHRMA) which had remarkable long
intervals between tear-downs.
Here's one of my favorite tests from years ago...
The dome coatings in particular were tested on a hot rod v-twin motor
(Harley) that started when the owner was super skeptical about the
claims of thermo barrier coatings.
Here's what he did...
The front cylinder piston was uncoated. The rear cylinder piston was
coated with the above mentioned process. During the running process, the
heat sensors showed the rear cylinder 65 degrees cooler. True story. We
have noticed the benefits of these coatings many, many years ago and
have decided to stock thermo barrier pistons and cylinder heads for the
performance minded.
Piston
coating: $139.00
Combustion
chamber coating: $139.00
Call to
order.
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If you're
in need of tech help, refer to our
pistons tech tips page.
A 3.99% customer service
charge is applied to all phone orders.
If ordering via phone,
please also provide the part # of any products you are interested in for faster
and more accurate service.
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It is the sole and
exclusive responsibility of the purchaser to determine the suitability of any
part, product or work for his or her use.
The purchaser shall assume all legal, personal injury risk and liability and all
other obligations, duties and risks therewith.
There is no warranty on High Performance products.
Click
to go back to our Pistons Page
Cycle
X Global Headquarters
6246 US
Hwy 51 South
Hazelhurst,
WI 54531
Phone:
715-356-7346
Email:
hotrodcyclex@gmail.com