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YAMAHA 4 STROKE MOTOR MODS
&
ENGINE PARTS

RX-1 LIGHTWEIGHT BATTERY

The OEM Battery weighs 14.8 pounds and has an 18 Amp-hour capacity with 270 CCA (cold cranking amps). Size 6.125" High by 6.90" Wide and 3.44" Deep

 

MBT-0200 is a Super Light replacement saving 10.0 pounds (weighing in at just 4.8 pounds) . This battery has a massive 300 CCA which is nearly equal to the OEM battery. It has a reserve capacity of 5 Amp-hours which is enough to start the Apex or RX-1 over 50 times at room temperature. Because of the reduction in reserve capacity we recommend you carry a set of our lightweight charging cables (less than 1.0 pound) just in case. It carries a 1 year warranty and a $50 no fault replacement warranty if you drop or brake it. It has a cycle life of 3 to 6 years. The sealed design of the battery eliminates the need for acid vent tubes so there is no more fear of acid burns or damage to the sled. This battery also has a starved-electrolyte design, and the US Department of Transportation (USDOT) has classified the battery as a dry battery, so it may be shipped worry-free by UPS/Federal Express or by air. The battery is just 3.14" High by 3.7" Wide and 5.4" Deep. 

MBT-0300 is an Ultra Light replacement sharing the same features as the MBT-0200 with the following changes: Saving 12.5 pounds (weighing in at just 2.4 pounds) . This battery still maintains 200 CCA but has a 50% reduction in reserve at just 2.5 Amp-hours which is enough to start the Apex or RX-1 about 25 times at room temperature. The battery is just 2.72" High by 2.88" Wide and 4.23" Deep. Recommend for Racing (not recommended for Trail Use).

Optimate III Charger: One of the best chargers available on the market. Fully automatic operation. Even charges deeply discharged maintenance-free batteries, unlike most chargers available today. Auto switchover to maintenance charging when full charge is reached to prevent overcharging. Includes quick connect harness & alligator harness.

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RX-1 Lightweight Batteries

US Dollars

 mbt-0100  Saves 2.5 Pounds - 
 mbt-0200  Saves 10.0 Pounds - 300CCA 5AH $ 229.00
 mbt-0300  Saves 12.5 Pounds - 200CCA 2.5AH $169.00
 mbt-0400  Lightweight charging cables with rectifier allowing charging from AC sleds (90% of sleds without batteries have an AC system) $49.95
 mbt-0500  Optimate III Automatic Charger  $52.60
 
 

SUPERCHARGER KIT for Apex, RX-1 & Vector

 

  • Basic Stage 1 Details
    • Air to Air intercooler.
    • Plus 13 pounds over stock sled
    • 10 pounds of Boost - 240HP on Apex, 230 on RX-1 and 210 on Vector
  • Stage 2 Details 
    • Saves 16 pounds of boost
    • Larger Supercharger
    • Larger Intercooler

     

 

 

SUPERCHARGERS   

US Dollars

 msc-1000  RX-1 Stage 1 230HP Supercharger Kit $4495
 msc-2000  RX-1 Stage 2 280HP Supercharge Kit $5495
 ggt-2450  Dash Mount Dual Gauge Pod $37.67
 ggt-2300  Wide Band Digital Recording True Air/Fuel ratio Gauge $439.95
 ggt-2200  Boost Gauge  $66.29
 ggt-2400  O2 Gauge Kit (with heated O2 Sensor & LED Display) $184.58
     Click Here for Digital Gauges (including boost & egt)   
 
 

APEX, RX-1 & VECTOR PISTON KITS - BIG BORES

Piston Kits come complete with balanced forged pistons, rings, pins & gasket set. Several versions are available, high compression 13:1, turbo 10:1. 

Big Bore Kits re-bore & coat your stock cylinders. Comes complete with balanced forged pistons, rings, pins & gasket set. Two 1025cc versions are available, high compression 12:1, turbo 10:1. Big Kits include machine work and parts. WATCH FOR OUR 1070cc BIG BORE KIT THIS SEASON!

Stock RX-1 compression is 11.8:1.

RX-1 Big Bores & Piston Kits 

US Dollars

 mtb-3013  RX-1 998cc 13:1 Piston Kit 599.95
 mtb-3010  RX-1 998cc 10:1 Supercharger / Turbo Piston Kit 599.95
 mtb-3512  RX-1 1025cc 12:1 Big Bore Kit 1199.95
 mtb-3510  RX-1 1025cc 10:1 Supercharger / Turbo Big Bore Kit 1199.95
   

WATCH FOR OUR 1070cc BIG BORE KIT THIS SEASON!

 
  
  

APEX & RX-1 HEAD STUDS

 

 

Apex & RX-1 Head Studs

US Dollars

 
  
  

OEM CARB MAIN JETS & PILOTS

MPI stocks a complete selection of jets for all Yamaha Carbureted 4 Strokes. All components are genuine Mikuni.

 

Main Jet Example (120, 121.3, 122.5, 123.8, 125, 126.3, 127, 128.8)

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OEM CARB MAIN JETS & PILOTS
120 Main jet = mjm-1200 or 153.8 Main Jet = mjm-1538

US Dollars

 mjm-xxxx  Main Jets 120-160 by 2.50 (120, 122.5) $ 3.50
 mjm-xxxx  Main Jets 1/4 sizes (xx1.3, xx3.8, xx6.3, xx8.8) $ 6.50
 mjp-0xxx  Pilot Jets 12.5 to 30 by 2.5 (17.5 pilot = mjp-0175) $ 7.95
     
     
  
  

OEM PARTS PAGE 

 CLICK HERE FOR OEM PARTS PAGE

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