Yamaha YFM400 Jet Kit

 

MAXIMUM PERFORMANCE & LONGER ENGINE LIFE

  EXHAUST POPPING?  
FEELS SLUGGISH?

These are signs of a LEAN ENGINE, a Jet Kit will fix those issues.

100% Performance Guarantee- This is the single most important, cost effective modification that can be made to your ride. If you don't feel the difference in the seat, and it does not put a smile on your face after installing, just return it for a refund!

Kit Includes (UNLIMITED JETTING)  ( If what we sent is not perfect, we will send you any other sizes you need FREE)

  • UNLIMITED Main Jets               
  • UNLIMITED Pilot Jets                     
  • UNLIMITED Needle Adjusters        
  • UNLIMITED Nylon Needle Spacers
  • Slide Spring Modification
  • Drill Bits for
  • Slide Hole Modification (optional)
  • Idle Mixture Modification
  • Intake Airbox Modification
  • Exhaust Modification
  • Tuning Tech
  • Bike Specs
  • Carb Schematic
  • Carb Synchronizer Tool (how to build for $5)
  • Step by step instructions with photos for ease of installation.
  • Installation Support - If you need assistance we are there for you.

EVERY Kit Custom Engineered EVERY Time

MADE IN USA

BENEFITS

  • MORE HORSE POWER

          Designed to gain a safe 8%-10% in HP with intake/exhaust, 3-4% on bone stock.

  • MORE TORQUE

                       By addressing 1/4 throttle, you will feel more power down low,  meaning less shifting to a lower gear, and getting off the line.

  • LONGER ENGINE LIFE

            6SIGMA JET KIT is a performance upgrade that not only increases power, but allows the engine to run cooler and at optimum, which increases engine component life.

  • INCREASED PERFORMANCE

            Designed to improve all RPM ranges of performance and a quicker throttle response, helps remove the bog.


 HOW IT WORKS

    The stock carburetor from the factory is designed to meet Import Regulations ... not peak performance. Once you install or modify an exhaust or intake, you have put your bike into a leaner condition that will eventually damage your engine due to additional heat from running lean. If you notice any exhaust popping, pinging, or exhaust pipe discoloration, you are extremely lean. 6Sigma Jet Kits provide the parts and installation instructions to enrich/modify all the circuits in the carb, to fix this problem, and add performance you can actually feel in the seat. 

    This is not just some jets in a box, where you get to guess at what you need, and pull your carburetor 10 times trying to figure it out, it is a comprehensive Custom Engineered 6Sigma Jet Kit, addressing all throttle positions, throttle response. Each kit is Custom Engineered by 6Sigma to your bike and its modifications. Replacing just the jets does not address 1/4-3/4 throttle, or throttle response, only full throttle. This Kit is for all throttle positions, and throttle response. This is a tuner kit, to get everything out of your bike, that it can give.

    We don't just send it to you and hope for the best, we don't stop until your happy. Feel it still needs more on the top end, low end, mid range after installing? Let us know and we will continue to work with you to make it perfect for how you ride.

  


Customer Reviews

•        
*****WOW!  What a difference. It feels like a whole new bike. Runs perfect...pulls like hell (for a 450).Thank you very much!

-Dave


•         *****Hi, just wanted to say thanks. The jet kit worked like a dream and the flat spot that has always been a problem with my Daytona 1200 has gone. Very easy installation, too.       

           -m______6


•         *****Hey I just thought I'd let you know that after installing your kit my super tenere is a completely new bike!! before the kit it stopped pulling at 5500 rpm, after the kit it starts pulling at 6000 all the way to red line but hasn't lost any torque at lower rpms.               

          -Thanks David



FAQ'S
Q:  Is this kit for all (1,2,3,4,6) carbs on my bike?
A:  Yes,  1 Kit is for all the carbs on the bike. You only need to order 1 Kit for your bike.

Q: Do you ship international, and how much?
A: Yes, we ship worldwide, for $18.42.

Q: What size jets come in this kit?
A:  Each kit is different, based on the bike, modifications, and operating altitude, so jet sizes vary.

Q: What Stage (1-7) is this kit?
A: Each kit is different, based on the bike, modifications, and operating altitude, so the Stage varies.

Q: Do I need a jet kit?
A: If you have made any modifications, or just want a little more performance out of your stock bike, then yes you do need a kit.

Q: Can I install this kit?
A: Yes, you can install it, don't be intimidated if you've never done this before, only very basic skills are needed, and it has instructions with full support.

Q: How long does it take to install?
A: Time varies, but it is directly related to the # of carbs on your bike. Allow at least 1/2 hour per carb.

Q: Does this kit come with everything I need?
A: Yes, it is a comprehensive performance upgrade kit. Not to be confused with a basic rebuild kit.
 
Q: I just bought an intake/exhaust, why do I need this?
A:Why spend $300 to $700 for an exhaust and air filter that produce a 10%  increase in air flow while ignoring the big loss of horsepower due to not installing a comparatively inexpensive jet kit that increases the fuel flow to match.

•        6 Sigma Kawasaki KLR650 Jet Kit KLR 650 2008-17 Custom Carburetor Carb Stage 1-3