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ORDER ONLINE
Powroll
13840 Commercial Lp
Crooked River, OR
97760
Mail:
PO Box 920
Redmond OR 97756
Phone
541-923-1290
Fax
541-923-5637
Email
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STOCK SPECIFICATIONS:
47mm Bore x 41.4mm Stroke
9:1 COMPRESSION
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FYI:
Although externally similar to the Z50, the Honda XR and CRF 50 internals
are significantly different. No performance parts are readily
interchangeable. Click these links
CT70 1991 & LATER CT70
1982-1990 CT70 1981 &
EARLIER ATC, CT, CL 70
for our extensive lineup of parts for your particular model.
Chinese and Taiwanese engines which are 'like
Honda' design are not copies of the CRF or XR. These engines typically
share similarities to a variety of Honda engine designs, but aren't the same as
any ONE Honda engine.
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New minibike 'performance' shops emerge
all the time. With big ads and impressive claims, some are hard to
miss.
So, who are you going look to for mini
performance?
Powroll's been making minis go fast for
almost 40 years. We've really been there, and done that - in fact,
we probably invented it.
Our parts are designed and manufactured
here in the USA, made by U.S. riders, for U.S. riders!
Count on Powroll to have the parts you
need, and the answers to your technical questions - whether it's your
kid's CRF 70, or your own screamin' Z50. |
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49.5mm piston, 11:1 compression
A great increase in torque
and hp. Use with our Camshaft and Thrust Chamber for even better power!
INCLUDES: Piston, pin, rings,
circlips, headgasket, basegasket.
REQUIRES: Boring, rejetting.
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. |
00320 H BORE KIT 80cc --
$165.00
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50mm piston, 11:1 compression
INCLUDES: Piston, pin,
rings, circlips, headgasket, basegasket.
REQUIRES: Boring,
rejetting.
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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00320B H BORE KIT 50MM --
$165.00
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+ 9.5mm, 100cc’s with our 49.5mm Bore Kit
Incredible torque and awesome
overall power increase. Gain another 40% more hp over the bore kit
alone!
INCLUDES:
Powroll Tough Rod Assembly: Rod, pin, needles. Work done on your crank.
REQUIRES:
Send in your crank for modification. Download our
Stroker Booklet
for details.
RECOMMENDATIONS: Works best
with Powroll pistons.
*Modifications may be required if using other
piston or cam brands.
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16050RA H STROKE XR70 WTH
ROD ASSY -- $375.00
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BILLET,
NO CORE REQUIRED
Lift .266” IN/.266” EX.
Duration 210° IN/206° EX @.050”
This new grind is
specifically designed to give you the BEST power possible for your
Powrolled 70! 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
comp. piston. Uses stock bearings - not included.
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12746B H CAM XR70 BILLET
-- $150.00
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Stronger and less expensive than the OEM Honda chain.
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18540 H HD CAM CHAIN MINI -- $30.00
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Powroll-tuned to give you
perfect throttle response, along with huge increases in midrange and top
end. Better overall performance than any other carb kit on the market!
KIT INCLUDES: Pre-Jetted
Carb. Throttle Assembly (fits 7/8” bars). Special Hi-Velocity polished
aluminum manifold. 3 Extra Main Jets. Intake Gasket. Mounting Hardware.
K&N Filter.
RECOMMENDATIONS: Works best
on engines with at least a Powroll high compression piston and cam. Can
be used on a stock engine for better top end power, but throttle
response may not be as crisp.
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20538 H CARB KIT 19MM XR70
W/FILTER -- $270.00
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SUPER PRO
PACK - 16 Weights
Works like a slipper clutch on a Top-Fuel Dragster!
(nitro not included).
Replace some or all of your stock (heavy) weights
with lighter weight Titanium. Allows the engine to rev higher before the
clutch engages. Lowers clutch rotating mass.
Can be installed in groups
from 4-16. The more ti weights you run, the higher the engagement rpm.
INCLUDES: Super Pro Pack = 16 Weights. Detailed
installation instructions. |
16853 TI CLUTCH WTS 16PK
-- $50.00
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STARTER PACK - 4 Weights
Best for stock
engines. Modified engines will work better with the Super Pro
Pack.
Replace some of your stock (heavy) weights
with lighter weight Titanium. Allows the engine to rev higher before the
clutch engages. Lowers clutch rotating mass. The more ti weights you run, the higher the engagement rpm.
INCLUDES: Starter Pack = 4 weights.
Detailed installation instructions. |
16852 TI CLUTCH WTS 4PK --
$20.00
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CLUTCH SPANNER SOCKET
Used
to remove the clutch hub nut on Honda OHC 50's and 70's. You'll need
this tool to install any clutch modifications or replacement parts.
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18541 OIL SPANNER WRENCH
-- $9.95
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This CNC machined billet
aluminum piece installs in your stock muffler and 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,
Red, or Silver.
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17102 H THRUST CHAMBER
50-70-80-100 CHOOSE COLOR -- $45.00 $24.95 -- Sale
price, Includes Shipping!
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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.
Brushed Stainless Steel
Install with our Thrust
Chamber for a more sano look. |
17102NS H STAINLESS THRUST
NOZZLE 50-70-80-100 -- $45.00
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This Billet cap 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! Installs in place of
the stock intake valve cover.
Choose Gold, Blue, Red or Silver. |
18530 VENTED VALVE CAP --
$45.00
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