yz426 bogging & popping under initial acceleration

1 reply to this topic
  • BDN

Posted January 26, 2008 - 01:20 PM


Hey all.

I am 45, have been into bikes since I was 11, so i know a thing or two. . .

I am working on an almost brand new YZ426. It was my friends, who passed away on a BMX track here in So. Cal. a couple of years ago, and I am giving it a quick once over, before his widow sells it.

It starts right up, following the standard 426 starting procedure.

I let it get nice & warm (man these run hot huh?)
take the choke off
and rev it up. . . and it boggs under initial accel.

I rode it down the street, and if I let it come up to revs slowly, its ok, but if I romp on it. . . BWAAAHHH POP POP!

any thoughts?

Personally I ride a CR500. . . so 4 strokes are not my thing.

Long live Service Honda!


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

Posted January 26, 2008 - 01:34 PM


HEY ALL. . .


I read up on the "BK MOD". . . THANK YOU for who ever put that out there!


Related Content


Megabomb Fitment by 288yz450

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

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

YZ450F 03 Sparks driving me crazy by SirAttard

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

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.