Big Boys Stuff
The Horse Power Store
"WHEN FAST ISNT ENOUGH"
Custom head Porting to Complete Race Engine Packages
MX Racing TT Racing Cross Country to Drag Racing,
Honda Yamaha Suzuki , If it has a piston, we work on it!
For Technicial Questions Call Us or E-mail and we will answer Or to Discuss what Mods will work best for your Bike!
ASR Long Travel Front End
We specialize in Two and Four stroke, ATV/Motorcycle Performance parts. Cylinder head porting, ATV engine Custom Racing Parts. TT racing, Drag Racing, MX Racing, Big Bore kits, High performance Pistons, ATV Accessories.
Custom head work and engine building with the help of a Dynojet Dyno and a Superflow flow bench, our full service engine and machine shop is dedicated to the performance of ATV racing and fun!
Call us Today We appreciate your business and look forward to helping you soon!
SRP ATV Racing & Machine
WHEN FAST ISNT ENOUGH !! 252-771-0019 Or 252-573-0191
Cylinder Head Performance Parts Suzuki ATV, Honda ATV, Yamaha ATV MOTORCYCLE Engine Mods
High RPM Race Engines experiences a totally different air flow than most people think. In that context, air can be thought of as thick, sticky, elastic, gooey and heavy .
Porting the heads provides the flow and port velocity required to bring the engine to a higher level of efficiency.
More than any other single factor, the porting process is responsible for the high power output of modern engines.
The ultimate in ring seal is drilling the pistons for gas ports. Compression rings normally need about 0.002-0.004-inch (vertical) ring-to-groove side clearance to allow cylinder pressure to get behind the ring and force it to seal against the groove and cylinder wall.
Gas ports apply combustion pressure directly to the back of the ring, allowing the virtual elimination of side clearance. Since the ring is restrained by the groove itself, theres less opportunity for high-rpm ring flutter. Very thin, narrow, and lightweight 0.043-inchthick rings are needed to reap gas-portings full benefits. Gas ports work best with short piston-compression heights (under 1.200 inches) on engines running 7,000 rpm or higher. The gain is 1 to 3 HP!
No matter what you ride, we can make it faster!
We don't just sell it;
WE RACE IT TOO!
(and we win!)
Chassis Dyno tuning Motorcycles & ATV's
call for appointment
Standard and Big Bore Kits
TRX450R LTR450 YFZ450X ARTIC CAT
CAN-AM KAWASUKI ROLARIS
Complete Ported Cylinder Head Plus New CDI Race Cams, Springs, High Compression Piston
LTR450 YFZ450X TRX450R LTZ400
Most other 4 STROKES included
Your cylinder head will receive precision port work, combustion chamber modifications, and a 5 angle valve Job, all valves are back cut for improved flow. The head is flow-bench tested to ensure proper flow and port Velocity is substantially improved, resulting in much improved power output at mid and upper RPMs.
A gas ported forged high-compression CP piston
New camshafts are chosen based upon the needs of each customer to produce a broad spread of power from low RPM all the way to the rev-limit.
New CDI that has 10 pre-program setting plus 10 downloadable programs that can be tweaked to each engine's needs including fuel and Timing!
New Race Springs shimmed to the exact seat pressure needed for the camshaft.
Horsepower and torque are dramatically improved at all RPM. $1553.00
plus shipping Regular $2350.00
Southern Racing Performance
Porting and valve work surface head
Starting at $450.00,
This page was last updated: March 22, 2012
Over 25 years in building Drag race, Circle track, go-cart, ATV's and Motorcycle engines
We will ensure that the parts you purchase from us will meet your needs and hours of trouble- free riding
Got questions call us at 252-771-0019
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Thanks For Looking at our web site
stock to over sized valves
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