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 YAMAHA PowerNow for 4-Stroke Motorcycles

PowerNow improves airflow on the INTAKE (airbox) side of the carburetor to add power to your motorcycle.

PowerNow

PowerNow Plus improves airflow AFTER the carburetor slide to add power to your 4-stroke motorcycle.

PowerNow Plus

PowerNow System includes Power Now and PowerNow Plus for the maximum power increase and throttle response.

PowerNow System

We also stock "easy-adjust" Kouba Fuel Screws to fit factory - installed Keihin "FCR" carburetors.  If you have tried to adjust the air/fuel mixture screw on your FCR carburetor, you know one of these is a must!  These Kouba fuel screws make it easy to adjust your air/fuel mixture screw.
The K-FS1 fuel screw will fit:  KTM RFS 250/400/450/520/525, Yamaha YZF/WR 250/400/426/450, Honda CRF250/450, or Suzuki DRZ400E or other bikes with factory-installed Keihin FCR carburetors. (aftermarket FCR carburetors use a different thread pitch - do not use this fuel screw!)

Kouba Fuel Screw

TO PURCHASE:  Put a quantity in the box, then click the "Add to Order" button
or call PWCCost.com at 1-888-284-4588.
PowerNow System - 4-Stroke Applications Cost Qty
PNSY39 PowerNow System - fits Yamaha YZ/WR/YFZ 450F 2003-08 - includes PNY2/4 PowerNow and PNPKTMY39 PowerNow Plus $179.99
PNSY37 Power Now System - fits Yamaha YZ/WR 250F 2003-08 - includes PNY2/4 PowerNow and PNPRKY2 PowerNow Plus $179.99
PNSY37a Power Now System - fits Yamaha YZ/WR 250F 2001-02 - includes PNY4 PowerNow and PNPRKY2 PowerNow Plus $179.99
PowerNow - 4-Stroke Applications Cost Qty
PNY2/4 PowerNow - fits Yamaha YZ/WR 250F/450F 2003-08 $91.99
PNY4 PowerNow - fits Yamaha YZ/WR 250F/400F/426F 1998-2002 $91.99
PNYTTR PowerNow - fits Yamaha TTR 230 2005-08 $91.99
PowerNow Plus - 4-Stroke Applications Cost Qty
PNPKTMY39 PowerNow Plus - fits Yamaha YZ/WR 450F 2003-08 $91.99
PNPRKY2 PowerNow Plus - fits Yamaha YZ/WR 250F 2002-08 $91.99
Kouba Fuel Screws Cost Qty
K-FS1 Kouba replacement fuel screw - fits factory installed Keihin FCR carburetors (aftermarket FCR carburetors use a different thread pitch) $19.99
Availability Guide:
 = Normally ships the same business day  = Ships in 1 to 2 business days  = On backorder from the manufacturer
If you order an item that is on backorder, we will not charge your card until the order is ready to ship.

  

 
 












































 
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