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2002-2005
STOCK SPECIFICATIONS: 63.5mm BORE X 49.5mm STROKE
9:1 COMPRESSION
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POWROLL RECOMMENDS REJETTING ALL 02-05
CRF150F's
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We don't sell these parts, but you can purchase them from your local Honda dealer, or online through
Service Honda.
Want better
power for a stock engine? Purchase and install the jets shown, then
remove the airbox snorkel and either install our Thrust Chamber or Thrust
Nozzle in your stock muffler.
Even if you decide not to modify the airbox
or exhaust, we still recommend richer jetting. |
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For Stock Engines with OEM carb:
• Full Power Needle Kit Part # 16012-KPT-921
• 42 Pilot Jet Part # 99103-KPT-0420
• 108 Main Jet # 99113-GHB-1080 (high elevation)
• 110 Main Jet # 99113-GHB-1100 (low elevation)
For Modified Engines with OEM carb:
(Powroll carb highly recommended!)
• Full Power Needle Kit Part # 16012-KPT-921
• 42 Pilot Jet Part # 99103-KPT-0420
• 110 Main Jet # 99113-GHB-1100 (stock cam, high comp
piston)
• 112 Main Jet # 99113-GHB-1120
• 115 Main Jet # 99113-GHB-1150
• 118 Main Jet # 99113-GHB-1180 (start here for big bore) |
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PISTON KIT - HIGH COMPRESSION -
63.5mm Piston 12.5:1 Compression
Powroll’s super-lightweight
high quality forged piston increases compression and gives the CRF
awesome throttle response. Racers working with a 150cc class
displacement limit will love this option.
INCLUDES: Piston, circlips.
Uses stock Honda rings, pin, headgasket and basegasket (not included) -
can be purchased from your Honda dealer, or as kit #00339K
below.
REQUIRES: Rejetting. Race Gas
Mix 100 octane minimum.
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00339 H BORE KIT CRF150 HI COMP -- $219.00
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CRF 150 OEM Parts Kit
Use with our High
Compression kit listed above. Kit includes stock Honda rings, pin,
headgasket and basegasket.
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00339K H CRF150 GASKET SET -- $65.00
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170cc BORE KIT
- 66mm Piston, 11:1
Compression
Great overall horsepower increases. This is the largest available
bore-in kit which leaves a safe cylinder wall thickness. Easy bore-in
and no case machining make this kit a cinch to install.
INCLUDES: Piston, pin, rings, clips, headgasket and basegasket
REQUIRES: Cylinder Boring, rejetting
RECOMMENDED: Works best with our Camshaft, 26mm Carb, and
any of our exhaust options listed.
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00336 H BORE KIT CRF150 170 -- $230.00
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STROKER WITH HEAVY-DUTY ROD ASSY 4.0mm - 53.5mm total stroke.
170cc with a stock-sized piston, 190cc’s with our 66mm kit
Great torque and midrange
power.
INCLUDES: New HD rod
assembly. Work done on your crank.
REQUIRES:
Send in your crank for modification. Download our
Stroker Booklet for
details.
RECOMMENDED: Works best with
Powroll pistons. Modifications may be required if using other piston or
cam brands.
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16080RA H STROKE CRF150 4MM W ROD ASSY -- $375.00
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STROKER WITH HEAVY-DUTY ROD ASSY 9.5mm - 59mm total stroke.
187cc with stock-sized piston, 202cc with our 66mm kit
Excellent
torque! Recommended for riders who need maximum low-end power and don’t
want a high rpm engine.
INCLUDES: New HD rod
assembly. Work done on your crank.
REQUIRES:
Send in your crank for modification.
Download our Stroker Booklet
for details.
RECOMMENDED: Works best with
Powroll pistons. Modifications may be required if using other piston or
cam brands.
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16079RA H STROKE CRF150 9.5MM W ROD ASSY -- $425.00
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PERFORMANCE
CAMSHAFT -
HARDWELD
CAM, CORE CHARGE INCLUDED
Hardweld cam on stock core.
The R&D department calls this the ‘Cam to end all Cams’.
More testing went into this
cam than any other we’ve ever built. Midrange hesitation is an issue
with most camshafts for this model, but this Powroll grind works
perfectly; very smooth power at super-low rpm, a very nice
wheelie-friendly midrange hit and power all the way to redline; this is
a cam that does it all!
As an added bonus, this grind
uses stock springs and retainers.
Can be used alone, but gives
best performance with one of our piston and/or stroke kits.
REQUIRES: Core Exchange or Core
Charge. Clearance must be checked when using OEM or other
non-Powroll pistons.
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12756-22756G H CAM CRF150-230 (Price incl.
core crg of $75.00) -- $225.00
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26mm
CARB - TRAIL & TRACK KIT
Our 26mm Mikuni
Round-Slide carb is specifically designed to give your CRF better
throttle response, more midrange and excellent top end with this bolt-on
application!
INCLUDES: Pre-jetted
carburetor with Billet flange and spigot. Throttle Cable. Mounting
Hardware. Main jet assortment. Detailed installation instructions.
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20535 H CARB KIT 26MM CRF150 -- $300.00
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Easy and fast! 3 ways to modify the exhaust system on your CRF:
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QUIET AND POWERFUL - STOCK OR MODIFIED ENGINES
- Powroll Oversize Header #18351H WITH Thrust Chamber
#17105 and your
stock muffler.
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LEAST EXPENSIVE OPTION FOR STOCK ENGINES - WITH
SPARK ARRESTOR - Thrust Chamber #17105
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LEAST EXPENSIVE OPTION FOR STOCK ENGINES - NO
SPARK ARRESTOR - Thrust Nozzle #17105N
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POWROLL OVERSIZE HEADER -
USE
WITH YOUR STOCK MUFFLER
Designed specifically for use
with the Powroll bore kits and other performance products for excellent
power increases.
Better throttle response and
more top end. Use with stock unmodified muffler, with the Thrust Chamber
for more power, and the Thrust Nozzle for the best horsepower.
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18351H H HEADER CRF150 -- $80.00
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THRUST CHAMBER - Spark Arrested -
MODIFY YOUR STOCK MUFFLER FOR MORE POWER
This CNC machined billet
piece works in tandem with your excellent stock exhaust system for
better power without increased sound levels.
Performance similar to
many complete aftermarket exhaust systems! Better throttle response
and increased top end. Works with stock spark arrestor.
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17105 H THRUST CHAMBER CRF -- $55.00
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THRUST NOZZLE - Not Spark Arrested -
MODIFY YOUR STOCK MUFFLER FOR MORE POWER
No need for
the spark arrestor? The Thrust Nozzle will give you better power than
running without the stock end cap (and more power than our Thrust
Chamber).
Power gains as good as or
better than some complete aftermarket systems! Louder and throatier
sounding than the Thrust Chamber, but still more stealthy than
aftermarket mufflers.
Replaces the stock spark
Arrestor unit.
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17105N H THRUST NOZZLE CRF -- $55.00
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