millemg
17-04-08, 08:00 AM
I think this is the place to ask ? :D
A friend of mine emailed me about his K2 sv650s yesterday, can anybody help ? :
"Dragged the SV650s out of mothballs last week, the front brake's seized but that's easily sorted. The big problem is when I tried to start it.
After charging the battery overnight it only had enough juice to rattle the starter motor a bit. Took a week to get a new battery - put it on - started - running on the front cylinder only accompanied by a lot of farting and banging from, I assume, the rear cylinder firing occasionally. That's not unusual after standing for 9 months, but it usually clears up when it gets warm - but this time opening the throttle slightly doesn't accelerate the engine, just more sucking and banging then stalls.
Took the plugs out (new last year - done about 100 miles) and cleaned and gapped. Put them back in - starts - still running on front cylinder only (can tell coz the rear exhaust's cooler). http://www.southportforums.com/forums/images/smilies/confused.gif
Got a spare plug, plugged it into the rear HT lead, held it against a ground - no spark.
Took the front plug out to try it in the back cylinder but first checked the spark - seemed really weak and dancing around, seemed to be emanating from inside the plug.
Plug in back cylinder only - not firing at all.
Took the coils off and wired the front coil to the rear wiring - Back cylinder now firing.
So tried wiring the back coil to the front cylinder - firing!! Yay! - but a bit puzzled as to why.
Now it starts properly and ticks over (with choke) quite smoothly - but open the throttle and same symptoms as before - bang! suck! stall!
Next the fuel is suspect, almost a year old. Drained out 6 litres of the stuff and bought some new 90-RON and refilled. Re-started - exactly the same http://www.southportforums.com/forums/images/smilies/frown.gif
Checked all the electrical connections, cleaned and WD40'd - no difference so gave up.
I'm wondering how the ignition timing works on these - whether the stator-plate might want to move but be seized, or whether the problem is with the ECU.
Sorry it's a bit long, but any thoughts from the description?"
Thanks in advance
MG
A friend of mine emailed me about his K2 sv650s yesterday, can anybody help ? :
"Dragged the SV650s out of mothballs last week, the front brake's seized but that's easily sorted. The big problem is when I tried to start it.
After charging the battery overnight it only had enough juice to rattle the starter motor a bit. Took a week to get a new battery - put it on - started - running on the front cylinder only accompanied by a lot of farting and banging from, I assume, the rear cylinder firing occasionally. That's not unusual after standing for 9 months, but it usually clears up when it gets warm - but this time opening the throttle slightly doesn't accelerate the engine, just more sucking and banging then stalls.
Took the plugs out (new last year - done about 100 miles) and cleaned and gapped. Put them back in - starts - still running on front cylinder only (can tell coz the rear exhaust's cooler). http://www.southportforums.com/forums/images/smilies/confused.gif
Got a spare plug, plugged it into the rear HT lead, held it against a ground - no spark.
Took the front plug out to try it in the back cylinder but first checked the spark - seemed really weak and dancing around, seemed to be emanating from inside the plug.
Plug in back cylinder only - not firing at all.
Took the coils off and wired the front coil to the rear wiring - Back cylinder now firing.
So tried wiring the back coil to the front cylinder - firing!! Yay! - but a bit puzzled as to why.
Now it starts properly and ticks over (with choke) quite smoothly - but open the throttle and same symptoms as before - bang! suck! stall!
Next the fuel is suspect, almost a year old. Drained out 6 litres of the stuff and bought some new 90-RON and refilled. Re-started - exactly the same http://www.southportforums.com/forums/images/smilies/frown.gif
Checked all the electrical connections, cleaned and WD40'd - no difference so gave up.
I'm wondering how the ignition timing works on these - whether the stator-plate might want to move but be seized, or whether the problem is with the ECU.
Sorry it's a bit long, but any thoughts from the description?"
Thanks in advance
MG