PASSION RACING ENGINES specializes in high performance modifications to all types of 2 stroke engines including Yamaha
Banshee engines.  Every engine is custom built to your needs and wants with current and future mods in mind.  This insures you will
receive a custom hand crafted engine designed from the ground up for your specific needs.  We do not offer blister-pack (STAGE)
motors.  Each customer is questioned and counseled on a personal level to achieve  the desired results.

All engines are personally designed, ported and assembled by James Smart, who has over 30 years in 2 stroke engine development
and modification.  His designs have been shipped around the world and are a dominant force on race tracks in the USA and abroad.
Each engine is designed for type specific performance and utmost reliability in mind.


PASSION RACING ENGINES also offers various engine,exhaust, and induction components that are specifically type matched to
your individual engine design at competitive pricing.

2 CYCLE ENGINEERING DESIGN AND DATA SERVICES

Due to overseas shipping complications in some country's around the world, some of my otherwise potential customers have found it
easier to let us design and engineer performance packages and supply all needed engineering data and porting designs for their
intended applications. These engineering packages include complete porting design for any application including all time/area
calculations, port efficiency data,basic port lay-out, port preparation data,cylinder prep and build advisory commentary. In addition ,
Passion Racing Engines can also include in these packages full combustion chamber and head design for gasoline or
methanol,expansion chamber design,complete with full engineering data back-up. These engineering back-ups cover all applicable
data for inspection by professional engine builders to build directly off of, making the entire "package" easier to understand just exactly
what is happening from a overall view. I also may provide much more extensive balanced resonance , pressure ,velocity ,and
combustion data in some cases among numerous other complimentary design parameter comparison data.
All  2-stroke engines operate by the same laws of physics ,so this service is NOT limited to just Yamaha Banshee engines. Anything
from awe inspiring chain saws to record setting road race engines can be built from my data.

Contrary to what you may have read or discussed among friends, effective  type specific 2 stroke engine design
processes ARE an exact science. Although the  mathematics involved are far beyond the capability of most individuals ability, I've
devoted my entire adult life to this science and  I've  pioneered and re-defined some of it along the way. My relentless passion and
devotion to this science over the last 3 decades allows  me to produce  with certainty, completely mathematically balanced and
predictable engine designs with amazing accuracy. If this type of service is needed for you or your race team's horsepower addiction,
please email (only), me with your situation containing your specific needs,and we will make you the dominate force to be reckoned with.
PLEASE, only email's will be accepted concerning  engineering packages. I have a tremendous phone backup already with my engine
building service and simply do not have that many hours in a day. I trust only myself ,so I'm a really busy guy while building my customers
engines.
I reserve the right to decline  this service in some cases for I would take it quite personal to be defeated by one of my own designs. After
all, 2nd place is just another way of saying "1st loser", and that is an emotional experience that I have successfully avoided  through my
endless efforts, as well as complete exhaustion.....James Smart
Passion Racing Engines
Tulsa, Oklahoma
Telephone:  (918)232-3950
passionengines@yahoo.com
When your ready for the good stuff , let our
Passion become yours
Last updated 2-2013

AFTER 3 YEARS OF RESEARCH AND DEVELOPMENT SNIPER RACING PRODUCTS AND
PASSION RACING ENGINES ARE EXCITED TO ANNOUNCE THAT SNIPER ASSASSIN INFRAMES
ARE HERE!!!!
LATEST NEWS ON THE SNIPER  ASSASSIN INFRAMES
INTRODUCING 21st CENTURY EXPANSION CHAMBER TECHNOLOGY FOR
YAMAHA BANSHEE
HAND CRAFTED IN THE U.S.A.
Using global research efforts from the minds of Professor G.B. Blair (unsteady gas dynamics), Bernoulli(static, dynamic and stagnation
pressure),Hermann Von Helmholtz (resonance management), Fujio Nagao and Yuzuru Shimamoto(Factory Yamaha engineers) along
with comparative complimentary parameter observation software development from Gary Bilby of TST ENGINE SOFTWARE and port
efficiency design,combustion chamber design,initial pulse velocity and convection heat transfer research from James Smart of
PASSION RACING ENGINES, we have produced the highest wave amplitude and pulse efficient expansion chamber ever offered to the
general public for the Yamaha Banshee.

Every individual section of this chamber is velocity and resonance matched from front to rear. In short, it comes on like an atomic bomb
and just never seems to shut off. Couple this with high quality manufacturing and aesthetically pleasing function, and you have an
investment grade power pumping monster. It easily out performs ANY  production inframe or out of frame drag pipe offered by anybody
anywhere....period!!!!

Standard models were specifically designed for high BMEP engines from 392cc-485cc.  Hybrid versions are available for 485-610cc.
This is ABSOLUTELY "THE" CHEETAH CUB PIPE OF ALL TIMES. We also designed pre-production alteration abilities to expand  
specific application capability's and engine formats...so we can tune your pipes for your engine at a pre-production level. Never has this
level of precision tuning been offered to anyone that asks for it.

We offer these chambers in  Bare, and Show Chrome.
Chamber bodies are TIG welded for the cleanest possible welds.  All sets come with 6061T6 aluminum billet silencers(resonance
matched) with stainless steel perforated tubing and stainless steel packing(no more re-packs!), or optional fibre-glass packing for a
smooth quieter tone..All mounting tabs are beyond rigid for years of service.

Chambers were specifically designed to be infinitely adjustable from front to rear to insure fitting options required for different carb, filter
applications. They will clear the biggest mono-blocks and even the RZ Yamaha series cylinders. We tried to cover all the bases on
function. Petcock and plug access are excellent. They are symmetrically matched from side to side giving the most efficient slipstream
possible. We also offer custom  tuned to your engine hybrid out of frame versions of this pipe. Optional interchangeable stinger section
versions also available for custom tuning at the track or as the need arises, you know, when you cant get past that need to REALLY rub it
in!
THE NEW STANDARD IN ENGINEERING IS HERE!!!
SNIPER BANSHEE PIPES CPI PIPES SHEARER
PIPES, TRINITY PIPES LRD PIPES ROCKET
PIPES RDZ PIPES BANSHEE TOOMEY PIPES
BANSHEE SHEARER DRAG PIPES CPI DRAG
PIPES BANSHEE INFRAME IN-FRAME PIPES OOF
CHEETAH CUB PORTING CHEETAH CUBS
CHEETAH CUB PIPES BEST CUB PIPES CUB
PORTING CHEETAH PORTING 2 STROKE
PORTING 2 CYCLE ENGINE PORTING SERVICES
STROKER PORTING BANSHEE BANSHEE
PORTING TRINITY CHEETAH PORTING   DRAG
PIPE OOF PIPES PERFORMANCE HOP-UP 2
STROKE SOFTWARE 2 CYCLE SOFTWARE
421 CHEETAH CUB PORTED ON GASOLINE 40MM LECTRONS,
VF3 REEDS +5 ADVANCE IGNITION TIMING 180PSI
COMPRESSION@700 FT. ALTITUDE
two stroke 2 stroke porting honda kawasaki yamaha
suzuki aprilia porting stoker porting expansion
chambers head squish cylinder porting 2 stroke 2
cycle two cycle two stroke porting porting porting
performance porting, custom expansion chambers
Custom 2 cycle racing engines and expansion chambers for any application. Honda, Kawasaki, Yamaha,
Suzuki, Aprilia and ANY other 2 stroke you might have.
ROADRACE, MOTOCROSS, TT, ICE RACING, SAND DRAG, 1/4 MILE, SHIFTER CARTS
WATERCRAFT.....ALL ENGINES DESIGNED  BY USE OF THE MOST ADVANCED SOFTWARE
AVAILABLE... BASED ON THE RESEARCH STUDIES OF PROF. GORDON BLAIR
BRAD PAINTER..TEAM PASSION - SNIPER  
2012 SEASON BBDR 500 FT DRAG RACING CHAMPION
465CC (114+HP)   100+MPH IN 500 FT. ON GAS!
PASSION RMS 500 OUTLAW SHIFTER KART ENGINE
FITTED WITH CUSTOM SNIPER SPEC RESONANCE  
MATCHED  EXPANSION CHAMBERS

8 STAGES OF SYNCHRONIZED AMPLITUDE!!
0
918-232-3950
2 stroke porting 2 cycle porting  2 stroke engine
builder 2 stroke modifications two  cycle