HHR Performance - Engine Performance

Engine Performance

Motorcycle Engine Parts and Accessories

Browse our online selection of high-end motorcycle engine parts and accessories, including cooling systems, hose kits, throttle bodies, clutches, and more.

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Engine Performance   - Air Filters
MWR and Sprint Air filters for Road and race motorcycles
Engine Performance   - Camshafts
Engine Performance   - Engine Hardware
Engine Bolt Kits give you the option to customize your engine with color, upgrade your bolts to Titanium or Aluminum , Some of these kits are pre drilled for lock wire so your engine bolts go nowhere
Engine Performance   - Velocity Stacks

Engine Performance Featured Products

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Items 1-9 of 9
Description:
 
Graves Motorsports Smog Block Off Plate for Kawasaki Ninja EX400. The Graves Motorsports Smog Block Off Plate is designed to seal off the port on the valve cover used by the air injection system (a.k.a smog pumps or AIS). This product is intended for closed course competition use only. Use of this product for any other purpose is strictly prohibited.

Fitment: Kawasaki Ninja EX400 2018 +

The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons.

Once this is capped off the air injection system can be safely removed. These Smog Block Off Plates are made from CNC'ed billet aluminum and feature the Graves Motorsports "G" logo. There are three reasons why you want to remove the air injection system from your bike;

  • 1. If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.
  • 2. To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra "fresh air" in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio.
  • 3. This addition will typically remove the majority of popping on deceleration that can be experienced with un-burnt gasses within the emission charcoal chamber. Note: Proper tuning may be needed and this is general feedback.
Item #: AB020
Condition: New
Price: $29.99
Qty:

Description:
 
Graves Motorsports Smog Block Off Plates for the 2016-2019 Kawasaki ZX-10R model Sport Bikes. Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the valve cover used by the air injection system (a.k.a smog pumps or AIS). Sold in pairs ( as pictured).  This product is intended for closed course competition use only. Use of this product for any other purpose is strictly prohibited.

Fitment: Kawasaki ZX10r 2016-2019

The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons.

Once these are capped off the air injection system can be safely removed. These Smog Block Off Plates are made from CNC'ed billet aluminum and feature the Graves Motorsports "G" logo. There are three reasons why you want to remove the air injection system from your bike;

  • 1. If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.

  • 2. To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra "fresh air" in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio.

  • 3. This addition will typically remove the majority of popping on deceleration that can be experienced with un-burnt gasses within the emission charcoal chamber. Note: Proper tuning may be needed and this is general feedback.
Item #: AB022
Condition: New
Limited Supply: Only 0 Left!
Price: $38.95
Description:
 
Graves Motorsports Smog Block Off Plates for the Kawasaki model Sport Bikes listed below. Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the valve cover used by the air injection system (a.k.a smog pumps or AIS). Sold in pairs This product is intended for closed course competition use only. Use of this product for any other purpose is strictly prohibited.

Fitment:
  • Kawasaki Fitment: ZX6R / ZX6RR 2003-2006 / ZX10R 2004-2012 / ZX14R 2006-2012 / EX300 2013-2014


The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons.

Once these are capped off the air injection system can be safely removed. These Smog Block Off Plates are made from CNC'ed billet aluminum and feature the Graves Motorsports "G" logo. There are three reasons why you want to remove the air injection system from your bike;

  • 1. If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.
  • 2. To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra "fresh air" in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio.
  • 3. This addition will typically remove the majority of popping on deceleration that can be experienced with un-burnt gasses within the emission charcoal chamber. Note: Proper tuning may be needed and this is general feedback.
Item #: AB018
Condition: New
Price: $36.95
Qty:

Description:
 
Graves Motorsports Smog Block Off Plates for BMW S1000rr model Sport Bikes. Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the valve cover used by the air injection system (a.k.a smog pumps or AIS). Sold in pairs ( as pictured). This product is intended for closed course competition use only. Use of this product for any other purpose is strictly prohibited.

Fitment: BMW S1000rr 2010-2017 

The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons.

Once these are capped off the air injection system can be safely removed. These Smog Block Off Plates are made from CNC'ed billet aluminum and feature the Graves Motorsports "G" logo. There are three reasons why you want to remove the air injection system from your bike;

  • 1. If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.

  • 2. To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra "fresh air" in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio.

  • 3. This addition will typically remove the majority of popping on deceleration that can be experienced with un-burnt gasses within the emission charcoal chamber. Note: Proper tuning may be needed and this is general feedback.
Item #: AB016
Condition: New
Price: $36.95
Qty:

Description:
 
Graves Motorsports Yamaha R6 WORKS Velocity Stacks 08-20. This kit works on all 2010-2017 models (with stock or Yamaha Kit ECU) and all 2008 -2009 R6 (when using a 2010-2017 stock ecu, FTEcu flash or Yamaha Kit ECU).

Electronically developed and test at the track on our Team Graves Yamaha race bikes these stacks smooth power and increase horsepower across the entire power band of your R6. Images shown are digital renderings.

NOTE: When installing on a 10-17 model. These kits do not contain instructions, they are intended for race technician installation.
Item #: W-ABY-08R6-VE
Condition: New
Price: $700.00

Qty:

Description:
 
Graves Motorsports Yamaha R1 FZ1 Velocity Stack Kit. The Graves Motorsports YZF-R1 and FZ-1 Velocity Stack Kit is specially designed to suit the new fuel injected Yamaha Motor.

The kit of 4 injection molded plastic intake stacks mount directly into the stock airbox without modification and is designed to smooth out the power curve, increase horsepower throughout and improve fuel efficiency. Power gains of 4 HP in the mid range and 2 HP at the top end are to be expected. For increased result combine with a Dynojet Power Commander and Graves Motorsports exhaust system to maximize your Yamaha R1 or FZ-1 horsepower.

Fitment: Yamaha R1 2004-2006 + Yamaha FZ-1 2006-2012
Item #: AB012
Condition: New
Price: $149.95

Qty:

Description:
 
Graves Motorsports Smog Block Off Plates for Honda CBR model Sport Bikes. Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the valve cover used by the air injection system (a.k.a smog pumps or AIS). Sold in pairs ( as pictured). This product is intended for closed course competition use only. Use of this product for any other purpose is strictly prohibited.

Fitment:
  • CBR600R F models (1999-2006)
  • CBR600RR (2003-2017)
  • CBR929RR (2000-2001)
  • CBR954RR (2002-2003)
  • CBR1000RR (2004-2017)
  • CB1000R (2011-2014)


The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons.

Once these are capped off the air injection system can be safely removed. These Smog Block Off Plates are made from CNC'ed billet aluminum and feature the Graves Motorsports "G" logo. There are three reasons why you want to remove the air injection system from your bike;

1. If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.

2. To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra "fresh air" in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio.

3. This addition will typically remove the majority of popping on deceleration that can be experienced with un-burnt gasses within the emission charcoal chamber. Note: Proper tuning may be needed and this is general feedback.

Item #: AB017
Condition: New
Price: $36.95
Qty:

Description:
Graves Motorsports Yamaha R1 Racing Camshaft Set 09-14
Graves Motorsports Yamaha R1 Racing Camshaft Set 09-14. These cams were developed by Graves Racing programs to compliment the new cross-plane R1 engine. The cam profiles are setup to produce maximum power over the complete RPM range. THESE CAMS ARE A DROP IN AND DO NOT REQUIRE SPRINGS. Includes intake and exhaust. Instructions are included with purchase. Gains of 5-7 hp can be achieved with these parts (up to 25 with the Graves full exhaust system, works velocity stacks and ecu).

This camshaft set is legal for AMA Superbike Competition

FITMENT: Yamaha R1 2009-2014
Item #: CMY-09R1-IE
Condition: New
Price: $1,312.50

Qty:

Description:
 
Graves Motorsports Yamaha R1 Velocity Stack Kit for the 2002-2003 model sport bikes. The Graves Motorsports YZF-R1 Velocity Stack Kit is specially designed to suit the new fuel injected Yamaha Motor.

The kit contains two rubber intake stacks that replace the stock intake units on the #2 and #3 cyclinders. These new intake stacks mount directly into the stock airbox (or Graves Ram Air Box) without modification and are designed to smooth out the power curve, increase horsepower throughout and improve fuel efficiency. Power gains of up to 6 HP in the mid range and 2 HP at the top end are not uncommon.

Fitment: Yamaha R1 2002-2003

MAPS (Right Click Name - "Save Target As")
Item #: AB003
Condition: New
Price: $99.95

Qty:

Items 1-9 of 9


More About Engine Performance

We only carry high-quality parts that aid in the racing performance of ourselves and professional race teams around the world. Amongst our selection, you’ll find Suter and STM slipper clutches, airfilters, Samco silicone hoses and clamps, and fuel tank thermal heat shields from Teknofibra.

Our high-performance motorcycle engine parts and accessories for sale are quality parts which are thoroughly tested by those who run their bikes the hardest.?