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  Home > MOTORCYCLE YAMAHA YZ250 1999-2015 BIG BORE >

YZ250.345.BIG BORE.KIT



 
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List Price: $1,179.00
Our Price: $1,179.00
Sale Price: $999.00
You save $180.00!

GAS

  
HEAD COLOR YAM

  
PORT DESIGN

  

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Description
 
THIS KIT COMES WITH THE CYLINDER, HEAD, PISTON, POWER VALVE ,AND GASKETS 78MM .HAS GREAT POWER AND SMOOTH POWER .THE POWER IS VERY EASY TO CONTROL THE POWER VALVE OPENS A LITTLE LATER TO MAKE IT EASY TO RIDE ON A SLICK TRACKS . THE POWER VALVE IS ADJUSTABLE . IT HAS A BOLT TO ADD SPRING PRESSURE .IT ALSO HAS A JET TO RELEASE AIR PRESSURE . THE BIGGER JET MAKES IT HIT HARDER . THE SMALLER ONE COMES ON SMOOTHER THIS KIT HAS A 78.MM PISTON SO IT WILL VIBRATE A LITTLE MORE HAS TWO OVER SIZE BORES 78.5, AND 79 MM IT CAN ALSO BE RE SLEEVED .CYLINDER COOLANT VOLUME IS INCREASED 30%. HEAD COOLANT VOLUME INCREASED 40%



http://youtu.be/ijKMclEPj9o

RACE FUEL ONLY ON THE 345 KIT

PORT DESIGN S7 PORTING IS FOR WOODS
PORT DESIGN S9 PORTING IS FOR MX SIMILAR TO STOCK WITH MORE POWER



WHY WE USE A STEEL SLEEVE
1 WE CAN BUILD THE KIT IN HOUSE
2 WE CAN OFFER DIFFERENT BORE SIZES
3 WE HAVE ALL THE PISTON KITS AND SLEEVE IN STOCK THE SAME AS ARE TRX CYLINDER KIT JUST DIFFERENT PORT WINDOWS WE MACHINE THEM HERE
4 WHEN GOING TO DIFFERENT BORES WE CAN CHANGE THE PORT ANGLES
5 WE CAN CHANGE THE PORT TIMING
6 ITS COST LESS TO MANUFACTURE FOR US
7 MOST SHOPS CAN BORE A CYLINDER
8 WE CAN MAKE BIGGER BOLT ON KIT THE STEEL SLEEVE IS STRONGER


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MOTORCYCLE YAMAHA YZ250 1999-2015 BIG BORE