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STOCK SPECIFICATIONS: 47mm BORE X 49.5mm STROKE
2006 and later models have electric start and other changes that make
pipe design requirements different.
FYI:
AMA allows 4-strokes up to 125cc in most 90cc youth classes.
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OUR BEST SELLING SETUP:
125cc
SUPER PRO KIT
53.5mm BORE, 4.5mm STROKE, 11.25:1
COMPRESSION
Legal in 90cc classes.
Requires cylinder re-sleeve, case machining & stroke work done to your
stock crank assembly. More than a 90% increase over stock hp!
REQUIREMENTS:
Send in your
crank for stroke work. Cylinder re-sleeve & case machining
(not included). Rejetting.
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SUPER PRO KIT - ORDER:
● BORE KIT #00345
● STROKER
#16095RA
● CAMSHAFT #12740
● CAM
CORE #22740G
● POWROLL
EXHAUST
SYSTEM
● CLUTCH SPRINGS
#16781
● LIGHTENED
CLUTCH SHOES
#16855
● VENTED VALVE CAP
#18530 |
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PISTON KIT - STANDARD BORE - HIGH COMPRESSION
47mm Piston, 11:1 Compression
This stock size kit installs
in your cylinder with no boring required.
INCLUDES: Piston, pin, rings,
circlips, headgasket, basegasket. REQUIRES: Check clearances before
installation.
RECOMMENDATIONS: Bikes ridden
at or near sea level may run better with a mix of 1/2 race gas and 1/2
premium pump fuel.
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00335 H BORE KIT TRX90 HICOMP -- $155.00
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BORE
KIT 95CC
49.5mm piston, 9.5:1 compression
Good boost in torque and
midrange when installed alone. Best with our Preferred kit listed above!
INCLUDES: Piston, pin, rings,
circlips, headgasket, basegasket.
REQUIRES: Boring, rejetting.
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00299 H BORE KIT 95CC -- $165.00
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BORE KIT - OVERSIZE FOR
95cc
50mm Piston, 9.5:1
Compression
.020” Oversize for our #00299
INCLUDES: Piston, pin, rings,
teflon pin retainers, headgasket.
REQUIRES: Boring.
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00299B H BORE KIT 95CC +.020 -- $165.00
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BORE
KIT 111CC
53.5mm
piston, 11:1 compression
Excellent low-end power,
quick throttle response and better overall horsepower with this kit.
Works even better when used in our Super Pro kit shown above!
INCLUDES: Piston, pin, rings,
circlips, headgasket, basegasket, sleeve.
REQUIRES: Re-sleeving, Boring,
Case Machining, rejetting.
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00345 H BORE KIT 111CC -- $279.00
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BORE KIT - OVERSIZE FOR ABOVE
54mm Piston, 11:1
Compression
.020” Oversize
for our #00345
INCLUDES: Piston, pin, rings,
circlips, headgasket, basegasket.
REQUIRES:
Bores into the Powroll sleeve provided with kit #00345.
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00345B H BORE KIT 54MM -- $185.00
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4.5mm STROKER WITH HEAVY DUTY ROD ASSEMBLY
54mm total stroke.
104cc’s with 49.5mm piston.
125cc's with 54mm piston
Incredible torque and awesome
overall power increase.
INCLUDES: New Rod, pin,
needle assembly. Work done on your crank.
REQUIRES:
Send in your crank for modification. Download our
Stroker Booklet
for details.
RECOMMENDATIONS:
Modifications may be required if using other piston/cam brands.
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125cc Kit
4.5mm Stroked crank with our 53.5mm piston kit (sold
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16095RA H STROKE TRX90 WITH ROD ASSY -- $375.00
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CAMSHAFT - RACE GRIND
HARDWELD
CAM, INCLUDES CORE CHARGE
Lift .239”
IN / .243” EX
This grind
is specifically designed to give you the BEST power possible for your
Powrolled 90! An awesome increase in mid to top end power when used with
our bore kit. Also works as a race grind (top end power) with our high
compression piston.
Works with
stock springs and retainers. Includes Bearings.
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12740-22740G H CAM TRX90 (price incl. core
chrg of $100.00) -- $295.00
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 CARBURETION |
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2006 & LATER MODELS - JET KIT
Larger jets for
the 2006 TRX90 aren't available from Honda, and stock jetting is
extremely lean. Any modifications done to this model will require
rejetting. This kit includes 3 larger main jets and a special needle
shim, which will work with engines up to 112cc's. We also include part
numbers and specialized jetting instructions for our 125cc kits.
KIT INCLUDES:
Needle shim, main jet sizes 92, 95 & 98. Jetting instructions.
Honda part numbers for larger jets.
RECOMMENDATIONS: Works
on any engine from stock to 125cc's.
NOTE - Jets are available for the earlier model TRX90 from Honda. All
Powroll orders include jetting information and part numbers to obtain
the correct jets.
Which to order? Choose
#21351w/s if
purchasing the jet kit alone (includes shipping via USPS Priority Mail).
Choose #21351
if purchasing with other parts, are ordering from outside the US, or
would like faster shipping.
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2006 and
Later Models --
POWROLL PERFORMANCE EXHAUST SYSTEM
The only aftermarket system
built for the TRX 90 that is designed specifically for modified engines.
Includes Tuneable
spark arrestor, jet kit #21351 & complete installation instructions.
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Powroll Exhaust, installed |
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18354 H EXH SYS TRX90 2006> -- $250.00
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1993-2005 Models -- POWROLL PERFORMANCE EXHAUST SYSTEM
The only aftermarket system
built for the TRX 90 that is designed specifically for modified engines.
Includes Tuneable spark
arrestor.
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18333 H EXH SYS TRX90 1993-2005 -- $225.00
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CLUTCH SPRINGS
Stronger springs to withstand
increased horsepower.
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16781 H CLUTCH SPGS TRX90 -- $21.00
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LIGHTENED (centrifugal)
CLUTCH SHOES
New Honda OEM clutch shoes, lightened
by Powroll technicians to give the best power possible with our engine
kits. Lighter shoes allow the engine to rev higher before
engagement - for no-bog holeshots!
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16855 H TRX90 LIGHTENED CLUTCH
SHOES -- $84.00
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VENTED VALVE CAP
This Billet cap is not only a
stunning visual addition to your tricked out scoot, it produces more
power by allowing the engine to vent excess crankcase pressure. Reducing
crankcase pressure will allow your engine to rev higher and pull harder!
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18530 VENTED VALVE CAP -- $35.00
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