| Cylinder Porting |
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| With today's highly developed two stroke engines, you need experience to improve performance.
Modifying the ports to higher power levels requires larger port areas for increased performance.
Thirty years and thousands of successful race engines has provided us with a large data base on
cylinder modifications. This in turn has led us to the development of our own proprietary formulas
for calculating the correct intake, transfer and exhaust areas for increased power levels. Generating the best
port shapes for maximum power without sacrificing reliability is one of our areas of expertise.
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| Trail Porting |
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Our dyno developed and field tested trail porting places priority on a wide powerband with good
back up torque. For maximum power output, the head should be machined to match the trail porting.
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| Trail Porting, per cylinder | LBR1020 | $249.00 |
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| Head Machining For Trail Performance |
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Machining of the cylinder head is recommended as part of the cylinder porting package.
Compression ratios and squish clearances are matched to work with premium pump gas. A head machined
for trail porting can also be used with stock cylinders for improved acceleration and top end power.
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| Head Machining (trail), per cylinder | LBR13006 | $70.00 |
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| Race Porting |
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Our race porting delivers maximum power for all out competition. Race porting gives you more power
at higher RPM's than our trail porting. Increased compression levels and tighter squish clearances
to speed up combustion at high RPM's will require the use of high Octane Racing gasoline.
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| Race Porting, per cylinder | LBR1021 | $299.00 |
| Vintage Race Porting, per cylinder | LBR1022 | $299.00 |
| Head Machining (race), per cylinder | LBR1023 | $80.00 |
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| Case Matching - Tunnel Porting |
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Intake and transfer flow can be improved by matching the transfer passages to the case.
Tunnel porting Rotary Valve and Case Reed intake passages improves flow and increases top end power.
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| Case Matching | LBR1010-CM | $70.00 |
| Tunnel Porting | LBR1010-TP | $80.00 |
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| Big Bore Kits |
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"There is no substitute for cubic inches" is an old Hot Rod saying. If performed together with
necessary increase in port area, you get more power from engagement to top end. With the high quality
Nicasil plating services now available, Big Bore kits can be as reliable as stock cylinders. Big Bore
kits include full porting modifications and machining of the combustion chambers and squish area to
the correct compression ratio.
| MODEL |
STD SIZE |
BIG BORE |
+ HP |
PART # |
Price |
| ARCTIC CAT | | | | | |
| T-Cat | 900 | 992 | 18 | POA10219 | $2,399 |
| T-Cat | 1000 | 1092 | 20 | POA10220 | $2,399 |
| ZRT | 800 | 992 | 32 | POA10221 | $2,399 |
| ZR | 800 | 883 | 14 | POA10268 | $1,699 |
| POLARIS | | | | | |
| VES | 600 | 660 | 12 | POP10732 | $1,899 |
| Indy | 650 | 732 | 15 | POP10733 | $2,229 |
| SKI DOO | | | | | |
| REV 800 | 800 | 840 | 12 | POS11400 | $1,899 |
| Mach Z | 800 | 889 | 18 | POS11514 | $1,899 |
| YAMAHA | | | | | |
| SX-SXR | 700 | 748 | 10 | POY12076 | $2,299 |
| SRX | 700 | 778 | 18 | POY12077 | $2,399 |
| Viper | 700 | 778 | 18 | POY12085 | $2,299 |
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| Crankshaft Repair Or Modification |
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When you need your crank repaired or modified with better bearings and pin welding, we offer expert service.
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| | LBR1005 | Price = Parts + Labor |
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| Cylinder Boring |
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Cylinder is bored to oversize and honed to correct clearance with your piston,
(piston extra)
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| Cylinder Re-Sleeving |
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New sleeves are bored and honed to piston size. Ports are matched to cylinders and chamfered to improved good ring life, (piston extra)
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| | LBR1018 | Price = $139.00 + sleeve price |
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| Cylinder Re-Plating |
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| Plated cylinders can be repaired with new Nicasil coatings. Damaged cylinders can be repaired
by welding and re-machining before plating.
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