Yamaha Raptor 660

Item Description

(sample pic)

yfm660r Raptor   01-05

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FIX that 4700 to 5200 rpm stumble!!!

Factory Pro's nearly 30 years of tuning competition and street carbureted vehicles makes their carburetor kits the logical choice to beef up the already radical Raptor for every weekend warrior out there. 
Factory Pro decided to enter the Quad market and bring that same carburetor tuning technology to the offroad market. 

FIXES that 4700 - 5200 rpm surge problems that stock and dynojet carb kits have.

An EC997 dyno - not a dynojet or Superflow - helped figure that out - So - If you want to actually fix things - use an EC997 Quaddyne dyno.

Kits are attractively packaged with short simple instructions for installation and for tuning. If you can clean a set of carbs - you can install this kit. Given a couple of hours, with Factory Pro's attention to design detail, will allow you to dial in your carbs for your new exhaust system!

Extract the most from your Raptor!


Config 30 carb kit with filters
Kit contains High pleat count, correctly spaced Factory Pro BMC air filter set.
BMC Air Filter Systems feature European craftsmanship. Lightweight and elegantly designed, they are easily washable and last years.
Make float height setting easier! Pick up a Float Cage Holder for Mikuni 38mm carbs  - Click here

detent_arm_5LP_Raptor.jpg (14700 bytes)

Raptor 660 Microbearing Detent Arm

pn: SHFT-PRO-Y66-KT  $59.95
2-3 weeks handling time - no core charge)

fits yfm660r, 01-05

replaces 5LP-18140-00-00 arm-no gasket supplied

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yfm660r Raptor  Microbearing Detent Arm

Make shifting much quicker and virtually eliminate missed shifts.  

Bring your shifting up to high performance  levels.

This is the FP Microbearing detent arm.

Reduces shift drum friction for more precise shifting - quicker shifts, virtually eliminates missed shifts.

Takes about an hour to install





Absolutely NO carb parts sold in California.

New and improved Suzuki Teka SFI  2

with new TPS display and "MMT" Memory Module Tuner

Finally - Quick, easy, cost effective Suzuki tuning with no expensive "add-on boxes"
Suzuki cruisers and sportbikes

Please click here for more info

Contact Factory Pro
M-F, 9am - 5pm, Pacific time, -7 or -8 GMT

800 869-0497
 USA and Canada

415 491-5920

parts information

EC997 dynamometer information

Product Support /Tech SECTION
click here


Mailing / Shipping address:

Factory Pro
179 Paul Drive
San Rafael, CA 94903

And most importantly
Restart back at the HOME page and click on the red box in the top left to find the bike that you want parts for...
restart at HOME page


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EFI and Carb Tuning - Most all FI and carb tuning

by Wheelsmith Racing

Flight Training - train with AMA race winner Todd Harrington.

The Harringtons own American Flyers, one of the most established flight training facilities in the USA.

 8 locations

The Rich Oliver Mystery School will help you discover your hidden inner strength. 
It will challenge you. It will teach you a new way of thinking, and a new way of riding. You can take your riding to an exciting new level!  

We use a variety of proven drills and training techniques. 
Practicing these techniques with our Yamaha dirt track trainers will enhance your abilities both on the track or the street.  

It doesn't matter what you ride or race, the Rich Oliver Mystery School improves everyone's skill level and mindset!

WW2 vintage flying Special

Book a sightseeing flight over the Wine Country or a Kamikaze aerobatic flight or a biplane flight over famous Sonoma Raceway, the Golden Gate Bridge and the San Francisco Bay for one or two during the spring and get a free souvenir t shirt!
(NEW!  Ask about the P-40 flights!)

707 938 2444

Just tell them that you saw this on the Factory Pro website!
Northern California's most unforgettable flying experience.  No experience required.  Open weekends!

The extension of the laboratory for engines of the Swiss Federal Institute of Technology was completed in about 1935. Its architect was Rudolf Otto Salvisberg (1882-1940). He had a successful career in Berlin but returned to Switzerland after the advent of the Nazis. His architectural style was somewhat similar to that of Erich Mendelsohn. The staircase of the laboratory is in normal use but well preserved.
Edited to the tunes of Chemical Residue by Herbie Hancock.