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These products are designed to work for the
CRF230F. We have not tested anything in the new CRF230L, which has a
different muffler system and some other changes which may keep our 230F products
from working properly.
STOCK SPECIFICATIONS: 65.5mm BORE X 66.2mm STROKE
9:1 COMPRESSION
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POWROLL RECOMMENDS
REJETTING ALL CRF230F'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:
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Full Power Needle Part #
16012-KPS-921
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Main Jet
# 99113-GHB-1320 (high
elevation)
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Main Jet
# 99113-GHB-1350 (low
elevation)
For Modified Engines:
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Full Power Needle Part #
16012-KPS-921
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Main Jet
# 99113-GHB-1350
(high elevation, stock cam, low
comp piston)
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Main Jet
# 99113-GHB-1380
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Main Jet
# 99113-GHB-1400
(start here for high comp piston
with our cam and/or other mods)
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PISTON KIT - HIGH COMPRESSION
66mm
Piston 10.5 to 12.3:1 Compression
Make your sleepy CRF sit up
and bark! Powroll’s super-lightweight high quality forged piston
increases compression and gives the CRF awesome throttle response,
better midrange and more rpm. Works best when paired with our camshaft
and one of the exhaust options shown below.
INCLUDES: Piston, rings, pin,
circlips, headgasket, basegasket.
REQUIRES: Boring, Rejetting.
Compression over 11:1 must run race gas mix. 12.3:1 Compression may
cause starter issues.
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00340 H BORE KIT 66MM CRF230 -- $200.00
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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 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 - INCLUDES CORE CHARGE --
$225.00
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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 Nozzle #17105N 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
Better throttle response and
more top end from any engine from stock to fully modified. Use with
stock unmodified muffler, with the Thrust Chamber for more power, or the Thrust Nozzle for the best horsepower.
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18353H H HEADER CRF230 -- $80.00
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SALE! CLICK HERE FOR DISCOUNTS ON THRUST
CHAMBERS AND OTHER GOODIES
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.
Choose Gold, Silver or
Red. |
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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.
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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