Identify my carb

1 reply to this topic
  • AFelix

Posted June 22, 2014 - 12:31 PM


I have a 1999 yz400f, the carb is a keihin, labeled 5BE1 01NA18. Is this factory, and what are the specs? Has a boyesen quick shot. What does this do for the bike/carb? Also has what looks like an aftermarket intake.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted June 23, 2014 - 06:35 AM


That's the OEM carb.  Specs can be found here: http://www.thumperta...tting-database/


The Quick Shot is kind of a waste of money, IMO.  No harm in it, though.  The aftermarket intake horn is probably a "Power Now" or similar device intended to stabilize intake air flow at part throttle.  It is somewhat effective on a 250F, but doesn't do much for a 400.

Related Content


Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 replies

Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.