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fj12 surging

Started by scotiafj, June 08, 2016, 05:10:07 AM

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scotiafj

June 08, 2016, 05:10:07 AM
Hi my fj12 3xw has started surging @ 60mph in top gear also the fuel consumption has dropped the fuel pump clocks n primes fine ..only thing I've done is change to a k&n filter..

FJmonkey

#1
June 08, 2016, 08:06:08 AM
What happens when you change back to the old filter?
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

4everFJ

#2
June 08, 2016, 10:05:21 AM
Yeah, a symptom of too lean is surging.

K&N no good without adjustments...  :nea:
1985 - Yamaha FJ1100 36Y
1978 - Yamaha SR500
1983 - Kawasaki GPZ550 (sold)
1977 - Kawasaki Z400 (sold)

aj52

#3
June 08, 2016, 12:27:15 PM
Hi there

Mine done the same when I went to k&n.
Had to balance carbs all over again.
Don't know if it is also your problem for surging
Current:                              
1991 FJ 1200 ABS
1991 FJ 1200
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