Big
Bore Thumpers offers the ultimate CR450R and CRF250 R/X cylinder
head solution with APE stainless*** valve conversions. These
conversions completely eliminate the problem of oem valved beating
themselves into the seats and the lash tightening up. Install
APE conversion and spend more time riding and less time working
on the motor. World famous APE valve springs are made from premium
chrome silicone wire for consistant pressure and excellent fatigue
life. Racers as well as street riders have come to depend on
APE springs for winning performance. We have had over 30 years
experience designing valve springs for the most high-performance
motorcycle engines. APE valve spring retainers are CNC machined
in-house from aircraft quality titanium bar stock. Special gauging
fixtures allow dimensions to be held close to provide exact installed
heights when assembling the cylinder head.
Fit all CR450Rs 2002 thru 2006 |
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STAGE 1 - INTAKE ONLY KIT
Consist of APE stainless steel*** valves. High performance valve
springs, specialey matched for ultimate valve control. Manufactured
from "super clean" chrome silicone wire. Titanium valve
spring retainers and steel spring bases
CRF450 and TRX450 Quad (2002-2004) #H450HS-1 - $139.95
CRF250R/X #H250HS-1 - $139.95 |
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STAGE 2 - INTAKE AND EXHAUST KIT
Same as stage one, with the addition of special stainless steel***
exhaust valves, made from premium "turbo grade" material
to better resist heat, and featuring hard chrome stems for extreme
wear resistance. Exhaust side matched valve springs and titanium
retainers.
CRF450 - #H450HS-2 - $277.95
CRF250R/X - #H250HS-2 - $277.95 |
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CRF450 VALVE SPRING KIT
APE introduces it's premium valve spring kit for the Honda CRF450R.
This kit features their exclusive "Gold Stripe" valve
springs. APE is a leading manufacturer of racing valve springs
for the powersports industry. APE springs are world renowned
in drag racing, road racing and endurance racing. This same expertise
is used in the design and manufacturing of these new CRF springs.
Manufactured from the finest super clean, chrome silicone valve
spring wire, for reliable, long life service. Exclusive titanium
valve spring retainers are manufactured in APE's state of the
art CNC facility, from premium aircraft grade Titanium. APE is
the only company that manufactures titanium retainers and builds
cylinder heads. We know what works and what doesn't. Kit includes
spring bases. LOOK FOR THE "GOLD STRIPE".
APE also does private label titanium retainer manufacturing.
If you are a cylinder head shop with your own special retainer
requirements, contact our engineering dept.
CRF450R/X - #VSKH450 $149.95
CRF250R/X - VSH250 $159.95 |
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STAINLESS STEEL AND TITANIUM VALVES
APE is a leading supplier
of high performance and racing valves for motorcycles. APE stainless
steel*** valves are precision manufactured from aircraft quality
Inconel based stainless steel***. This special material offers
excellent resistance to heat and distortion. APE stainless steel
*** valves are designed to be used in the most extreme racing
applications including the use of exotic fuels, or will give
many miles of trouble free street use. They present an outstanding
value. In most cases you can upgrade to APE stainless steel***
valves for less than the cost of replacement stock valves. All
oversize stainless steel valves feature hard chrome stems for
extra long stem to guide life.
Click HERE to see a complete listing
of valves for your motor. |
***These valves are a very high
tensile strength SAE HNV3 steel, used because the factory seats
on these models are too hard to get good valve face life with
stainless steel.
358.93.35 |
