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Cylinder, Head & Powervalve Assembly

Disclaimer: Fastech-Racing, Inc. is not an "Authorized" Rotax dealer or Service Center. There is no express or implied warranty direct from Rotax. Any defective part normally warranted through Rotax is covered by Fastech-Racing, Inc.

All parts are OEM Rotax unless otherwise noted.

All parts are OEM Rotax unless otherwise noted.

Products

#18-24, Rotax EVO Solenoid Mount Assemly - 2017
#18-24, Rotax EVO Solenoid Mount Assemly - 2017
Includes #18-24. 651925, 951935, 660520, 660522, nylocks and washers.
$47.95
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#41 Rotax EXHAUST FLANGE - 22mm (Old Style)
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$29.95
Market price: $39.95 save 25%
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273190 Exhaust Socket 2015 (Jr., Sr., DD2)
Rotax Max EVO upgrade part.
$29.95
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273192 Exhaust Socket 2015 (18mm Micro)
Rotax Max EVO upgrade part.
$29.95
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273194 Exhaust Socket 2015 (20mm Mini)
Rotax Max EVO upgrade part.
$29.95
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450360 Gasket for Exhaust Socket 2015
Rotax Max EVO upgrade part.
$13.95
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#2 Rotax Cylinder - 2018 Senior #613372 (B-Bore)
Latest 2018 Rotax Max cylinder.
$679.95
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#2 Rotax Cylinder - Junior #223991, 2017
2017 Junior Rotax Max EVO cylinder.
$549.95
Market price: $712.00 save 23%
Select Bore
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#2 Rotax Cylinder - Junior #223994 (LETTERED CYLINDERS) - (LZ/ B-Bore)
"LZ" Lettered cylinder with size "B" bore.
$385.00
Market price: $715.00 save 46%
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#3-17 Rotax Powervalve Assembly - COMPLETE
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$223.95
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Prospeed Rotax Power Valve Spring Tool
Prospeed's new Rotax power valve spring tool makes bellows hose spring installation a snap! Precision machined from tough, slippery Delrin, this tool will save you time and hassle. RTX-15
$24.95
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Wildkart Rotax Power Valve Spring Tool
Wildkart's new Rotax power valve spring tool makes bellows hose spring installation a snap!
$35.95
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#3 Rotax STUD M6X30,5/12
TIGHTENING TORQUE 2-3 NM
$7.50
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#4 Rotax EXHAUST VALVE
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$39.50
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#5 Rotax O-RING 6X3
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$2.60
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#6 Rotax POWERVALVE GASKET
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$4.25
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#7 Rotax VALVE ROD HOUSING
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$49.95
Market price: $66.95 save 25%
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#8 Rotax SPRING WASHER B6
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$0.25
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#9 Rotax ALLEN SCREW M6X16
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Call for pricing
#10 Rotax HOSE SPRING 70-1,7-0,3
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$2.40
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#11 Rotax BELLOW „GREEN“
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$20.25
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#12 Rotax EXHAUST VALVE PISTON
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$21.25
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#13 Rotax HOSE SPRING 134-3,0-0,65
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$3.95
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#14 Rotax COMPRESSION SPRING 42,5 / 0,8 MM
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$5.25
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239940 Rotax COMPRESSION SPRING 48,5/0,8mm - EVO UPGRADE
New spring upgrade for the new electronic power valve. From Rotax BULLETIN US OPEN – DALLAS - 1
IMPLEMENTATION: MAY 6th 2015:
In the Electronic power valve, the compression spring (Rotax part # 638 050) located under the exhaust valve piston must be removed. Compression spring (Rotax part # 239940) must be installed on the outer side of the exhaust valve piston (same configuration as the pneumatic powervalve).
$5.25
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481265 Rotax Power Valve Hose Upgrade Kit
481265 Rotax Power Valve Hose Upgrade Kit
Rotax implemented on May 6, 2015 to fix known issues with the new EVO Power Valve.
$17.50
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#15 Rotax VALVE COVER
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$23.50
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#16 Rotax ADJUSTMENT SCREW
STANDARD, FOR MANUAL ADJUSTMENT
$12.50
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#17 Rotax SPRING CLIP
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$8.25
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#20 Rotax Combustion Chamber Insert
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$115.00
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#25 Rotax FR125 Cylinder Head Cover
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$106.00
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#31 Rotax Reed Valve Assembly
Complete reed valve assembly includes items #32-35.
$92.95
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#33 Rotax Reed Petal
Sold individually.
$15.95
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#36 Rotax CARBURETOR FLANGE 42,5mm
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$74.95
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#39 Rotax HOSE CLAMP 51
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$3.95
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#40 Rotax EXHAUST GASKET
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$4.95
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#48 Rotax Mini Max Intake Restrictor
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$41.95
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#48 Rotax Mini Max Restriction Plate
9.10) Technical Specification (within the engine seal) for ROTAX kart engine 125 Mini MAX (10 kW):
For the engine configuration 125 Mini MAX, everything that is not specified below, latest technical regulation 2013 for engine configuration 125 Junior MAX is valid.
It is the responsibility of the competitor to check his equipment (all componentsoutside the engine seal and mentioned below), to assure that his equipment is in line with the technical specification below!

9.10.1) Squish gap:

a) 125 Mini MAX 1,20-1,80mm

For the United States:

-125 Mini Max 2.80 mm minimum

To achieve the defined squish gap, a spacer (ROTAX part no. 626 420), plus the different required base gaskets must be used. The squish gap must be measured with a certified slide gauge and by using a 3 mm tin wire. The crankshaft must be turned by hand slowly over TDC (top dead center) to squeeze the tin wire.
$45.00
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