99 rough idle popping [Archive] - Yamaha R1 Forum: YZF-R1 Forums

: 99 rough idle popping


Vettitude
11-27-2007, 04:04 PM
Ok. I have drained the gas tank and put in fresh gas. I have taken off the carbs, cleaned them(they didn't even look that bad). Put new plugs in it. My 99 still sounds like it is running on 2 or 3 cylinders at and slightly off idle. In neutral at around 4-6000 it pops BAD. At WOT she runs fine.

WHAT NEXT?!?!?!

Thanks for any advice.

J Wett

turd1
11-27-2007, 04:10 PM
Ok. I have drained the gas tank and put in fresh gas. I have taken off the carbs, cleaned them(they didn't even look that bad). Put new plugs in it. My 99 still sounds like it is running on 2 or 3 cylinders at and slightly off idle. In neutral at around 4-6000 it pops BAD. At WOT she runs fine.

WHAT NEXT?!?!?!

Thanks for any advice.

J Wett
get the carbs balanced/synchronised. go to a shop unless you have a manometer.

kellyr1
12-05-2007, 04:34 PM
carbs out of sync, coils, air filter, how did the carbs not look bad, hold jets to light, then clean, then hold to light, you will see they were dirty, this area is very sensitive, and if anything is in your tank, you will just run back into carbs, change fuel filter, gets some 44k put in gas, then start riding your bike more, lol. good luck, remeber push right lean right go right.