VINTAGE   PORTING . COM

 

HomePortingCrankshaftServicesAbout V.P.

 

AIR COOLED

CYLINDER   PORTING

 

 

"PACKAGE PRICES"

INCLUDE

CYLINDER ~ HEAD ~ INTAKE MANIFOLD ~ REED CAGE ~ PISTON MODIFICATIONS

AS APPLICABLE

(Your Top End components have to work together as a unit to provide the proper power delivery,

this is the reason for Vintage Porting treating the top end as a PACKAGE)

 

 

STAGE ONE       STAGE TWO       STAGE THREE 

STAGE FOUR       STAGE FIVE

SUPER SAVER

BLUEPRINT PORTS

 

               

 

 

STAGE 1

"PACKAGE"  

$175.00    up to 100cc singles

$195.00   all 125cc and up singles

$395.00   up to 200cc twins

$450.00   all other twins

$525.00   all triples including Kawasaki 350, 400, 500 & 750

 

 

STAGE 2

"PACKAGE"

$295.00   up to 100cc singles

$325.00   all 125cc and up singles

$425.00   up to 200cc twins

$525.00   all other twins

$675.00   all triples including Kawasaki 350, 400, 500 & 750

  * Stage 2 -  100% Cast Iron Cylinders or with  100% Cast Iron Transfer Ducts, additional $75.00 per cylinder.

           * Example - LS2 twins, YSR50, RD60, AT1, AT2, AT3, CT1, CT2, CT3, JT1, TS50, some Hodaka's and others

 

STAGE 3

"PACKAGE"

$550.00 & UP  per cylinder.  Case matching to o.e.m. base gasket and modify main bearing oil holes included.

  * Stage 3 - 100% Cast Iron Cylinders or with  100% Cast Iron transfer ducts, additional $125.00 per cylinder.

           * Example - LS2 twins, YSR50, RD60, AT1, AT2, AT3, CT1, CT2, CT3, JT1, TS50, some Hodaka's and others

 

STAGE 4

PORTING

"PACKAGE"

Stage 4 is limited to YAMAHA Single and RD Twin Engines

SINGLE

TOP END  (1968 thru 1976)

$1295.00      Stage 4 Top End Porting  including sub exhaust ports and Boyesen ports if/where required/possible,

                   cylinder head modified for CC's, squish clearance, squish angles and bowl polished,

                   cylinder machined for larger reed or billet intake manifold on  piston port engines, epoxy used as req.

                    window added to new piston (forged only) and skirts modified if required,

                    cylinder to case matching, outer crank bearing oil holes modified, glassbead cylinder and head,

                     new aftermarket piston, bore/hone/chamfer.

                    * 100% cast iron cylinders or cylinders with 100% cast iron transfer ducts add $200.00

                       Example - LS2 twins, YSR50, RD60, AT1, AT2, AT3, CT1, CT2, CT3, JT1 and others

 

SINGLE

COMPLETE ENGINE  (1968 thru 1976)

$3595.00    Complete Stage 4 engine. Assembled and pressure tested. Customer does final jetting

                    Includes: Stage 4 porting including sub exhaust ports and Boyesen ports if/where required/possible,

                    cylinder machined for larger reed or billet intake manifold for piston port engines,

                     cylinder head modified for CC's, squish clearance, squish angles and bowl polished,

                     window added to new piston (forged only) and skirts modified if required,

                    PVL Ignition, rebuilt crankshaft, undercut transmission, aftermarket clutch kit,

                    Mikuni VM or TM series carburetor, new bearings/gaskets/seals, aftermarket piston,

                     cylinder to case matching, oil holes to outer crank bearings modified, glassbead cylinder and head,

                    bore/hone/chamfer and a pipe specifications sheet designed to your engine

                    * 100% cast iron cylinders or cylinders with 100% cast iron transfer ducts add $200.00

                       Example - LS2 twins, YSR50, RD60, AT1, AT2, AT3, CT1, CT2, CT3, JT1 and others

 

                   

                   

TWIN

TOP END   (RD's only)

$1995.00     Stage 4 ported top end with sub exhaust ports, cylinders machined for larger reeds,

                    cylinder heads receive polished bowls/dual squish angles/decking & matched CC's,

                    cylinders and heads are glassbeaded, new Wiseco pistons with added windows, cylinders are

                    bored/honed/chamfered, aluminum spacer and fiber base gaskets, cylinder tops are decked,

                    welding and/or epoxy if/as needed for transfers and reed areas, crankcase to cylinders matched

                    and case oil holes to crank bearings modified.

 

TWIN

COMPLETE ENGINE (RD's only)

$4795.00     Complete Stage 4 engine, assembled and pressure tested. Customer does final jetting.

                    Stage 4 porting with sub exhaust ports, cylinders machined for larger reeds, cylinder heads

                    receive polished bowls/dual squish angles/decking and matched CC's, cylinders and heads are

                    glassbeaded, new Wiseco pistons with added windows, cylinders are bored/honed/chamfered,

                    aluminum spacers are installed at assembly, cylinder tops are decked, welding and/or epoxy

                    if/as needed for transfer and reed areas, crankcase to cylinders matched. Oil holes to main

                    crankshaft bearings modified, bearings, seals and gaskets replaced, PVL ignition, rebuilt

                    crankshaft, aftermarket clutch, undercut transmission and reshim, 2 Mikuni VM or TM series

                    carburetors, aftermarket intake system, K&N filters, TDR fiberglass reeds, Banshee reed

                    cages, pipe specification sheet designed to your engine.

 

 

STAGE 5

PORTING

"PACKAGE"

Stage 5 is limited to Yamaha Single and RD Twin Engines

 

SINGLE

$6595.00    Stage 5 is a complete engine package. You supply the completed bike, we remove the engine,

                    make the changes, dyno tune, install the engine and return to you an entire turn key ready to race

                    bike. Allow from 2 to 4 months turn around time.

                    YOU must make sure we have discussed and that we understand YOUR race organization rules.

                    Chassis and air box modifications are not included.

                    Stage 5 porting is the highest horsepower and torque that we have developed to date.

                    The use of welding, epoxy, cylinder spacers, cylinder liner changes etc will be made as needed. 

                    Engine is built using PVL ignition, aftermarket clutch, special bearings etc., a new highly

                    modified carburetor is built along with a Delta V Force reed assembly and any required

                    intake manifold or billet adapter. Piston port cylinders get a billet and rubber intake system.

                    K & N air filter is installed if your frame design and or air box have ample room.

                    The transmission is race cut and properly shimmed. The crankshaft

                    is modified, machined, rebuilt with custom bearings and computer balanced with our new

                    computerized CWT electronic state of the art balancer, we fabricate and install a new one-off

                     expansion chamber that is computer designed, simulation tested and dyno verified to your engine.

                     Dyno printout and Flow Bench data sheet included

                   

 

TWIN

$8795.00      Stage 5 (same description as Single)

                    Also includes custom cylinder liners, custom pipes, flow bench testing, engine dyno tuning

                     on our computerized Land & Sea Water Brake Engine Dyno

                    Dyno printout and Flow Bench data sheet included

 

 

 

CRANKCASE PORTING

$50.00 per cylinder   Case matching to o.e.m. base gasket and modify oil holes

$ Call                       Case porting requiring extra ports, welding, epoxy, machining etc.

 

 

Call   931-374-8164   to schedule