stuttering fzs 600

[cnw180]

[quote author=red98 link=topic=2066.msg45450#msg45450 date=1352366676]
[quote author=cnw180 link=topic=2066.msg45433#msg45433 date=1352329384]
I will try the filter back in at the weekend and let you know how I get on.

I just had a thought though. A friend checked the bike out for me a few weeks ago and commented that 1 cylinder was running hotter than the others (down pipe was noticeably hotter from startup). The other three cylinders were running a little rich(petrol smell) I will check the plugs at the weekend to to confirm this. Anyway a lean mixture would get even leaner with a new filter, so I wonder if one cylinder is too lean at high rpm and is causing the stuttering?


assume a carb balance may be the simple answer as in the long term, I cant simply stick the old, clogged filter back in, to force the bike to run rich.


Does this sound plausible though??

ummmmmm .....not sure about that  ......start by swaping the filter...i dont think thats the problem but once swaped you can forget about it  .....balancing the carbs is always a good thing    do you know when it was last done ? 
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.....well, checked the plugs and ht leads, bit of wd40 applied. Left New air filter in place as I noticed the rubber cover over the airfilter casing had snagged over the air intake, possibly restricting the airflow. Assuming the engine needs a huge "gulp" of air when the throttle opens, this may have been an issue. Will test ride before putting old filter back in.


Bike fired up fine, needed a bit of choke, normally doesnt! Idling ok, just a tiny bit lumpy...


Will post back later!!
[/quote]


Well I put the original filter back in and the bike is now fine, stutter gone!  :lol  Checked the two filters while out and the new one is a tiny bit smaller. Noticed the box it cam in had 98/99 for the year. Wonder in the filter is different on the 2000 model then????


Anyway, bike running nicely, carbs do need checking for balance, but power all back now!!