L2 Idling Problems
Posted: Sun Mar 24, 2013 1:16 am
Hi everyone,
I picked up my 92 bike yesterday, the previous owner told me from the off that it had problems running on 3 cylinders in the rain, only when idling and I would need to keep blipping the throttle. He said it was because the bike had non genuine (ngk) plug caps that were letting water in, and when the bike was above idle it was making a stronger spark (dafuq?) and wouldn't have a problem. I rode it off with the idle set to about 4000, got to a mate's and we took the airbox off, the plug caps were fine, plugs were also fine.
When I went to leave for home it did the same thing (revs going erratic and running on 3 on and off), his theory was bullocks anyway but the fact that the engine was completely dry disproved it completely. When the revs go erratic, sometimes it is OK but if it cuts out it takes a bit of cranking and usually a couple of backfires before it starts up again properly. As this only happens on idle, my mate believes it's gonna be one of the pilot jets or screws, so I imagine I should check the screws, is 2 1/2 turns out correct? If not that should I try cleaning out the pilot jet/carbs overall? My usually method is warm the bike up, pour carb cleaner/redex down the intakes without letting it die, until the white smoke has gone.
If not this, is there anything else I should try? The carb balance sounds fine but am I missing something obvious or a common ZXR fault? Apart from this I'm loving the bike, just need to get this niggle sorted
Thanks in advance
I picked up my 92 bike yesterday, the previous owner told me from the off that it had problems running on 3 cylinders in the rain, only when idling and I would need to keep blipping the throttle. He said it was because the bike had non genuine (ngk) plug caps that were letting water in, and when the bike was above idle it was making a stronger spark (dafuq?) and wouldn't have a problem. I rode it off with the idle set to about 4000, got to a mate's and we took the airbox off, the plug caps were fine, plugs were also fine.
When I went to leave for home it did the same thing (revs going erratic and running on 3 on and off), his theory was bullocks anyway but the fact that the engine was completely dry disproved it completely. When the revs go erratic, sometimes it is OK but if it cuts out it takes a bit of cranking and usually a couple of backfires before it starts up again properly. As this only happens on idle, my mate believes it's gonna be one of the pilot jets or screws, so I imagine I should check the screws, is 2 1/2 turns out correct? If not that should I try cleaning out the pilot jet/carbs overall? My usually method is warm the bike up, pour carb cleaner/redex down the intakes without letting it die, until the white smoke has gone.
If not this, is there anything else I should try? The carb balance sounds fine but am I missing something obvious or a common ZXR fault? Apart from this I'm loving the bike, just need to get this niggle sorted
Thanks in advance