Backfire/Spitting out of carbs

KzChop82
Topic Author
Offline
User
Registered
Posts: 145
Thanks: 7

Backfire/Spitting out of carbs

09 Apr 2015 17:48

What can cause spitting out of the carbs?

Clinton, NJ
Custom chopper, 1982 KZ 1000 M2 CSR engine, K&N Pod Filters

PICTURES AND GOPRO VIDEOS!! :
www.dropbox.com/sh/jipz3l8nhzr4jge/AABbm...OC3sqlhCSLxH5Fa?dl=0

Please Log in or Create an account to join the conversation.

Patton
Offline
KZr Legend
Registered
Posts: 18568
Thanks: 2101

Re: Backfire/Spitting out of carbs

09 Apr 2015 19:02

#667344

Here are two possibilities.

Insufficient valve clearance, especially the intake valve.

Incorrect ignition timing, or sticking advancer.

Good Fortune!

1973 Z1
KZ900 LTD

Please Log in or Create an account to join the conversation.

baldy110
Offline
User
Registered
Posts: 2272
Thanks: 512

Re: Backfire/Spitting out of carbs

10 Apr 2015 08:01

#667398

It can also be caused by the carbs jetted lean.

Please Log in or Create an account to join the conversation.

SWest
Offline
Sustaining Member
Registered
10 22 2014
Posts: 23414
Thanks: 2909

Re: Backfire/Spitting out of carbs

10 Apr 2015 08:17

#667399

My money would be on lean. Is it any better with the choke? Timing could be one tooth off being you just put it back together. I (assume) you got the valves to spec? With those pipes, it would be lean anyway, new valves and higher compression would change things.
Steve

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

Please Log in or Create an account to join the conversation.