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9 Posts
Ok guys this thing has the best of me at this point. Bought the bike from a co-worker in non running form. He bought it new and hurt his back and it has sat ever since until last weekemd. It has a whopping 1004 miles on it. It sat outside but covered and he drained the gas when he parked it (thank you). Tank was clean!
I have cleaned literally over 100 carbs in the last 5 years. I'm pretty familiar with them. If you've ever had to RnR shadow twin carbs you know they are no treat!
Anyways the problem is the bike starts, idles perfect, revs great....all when not under the load of actually riding it. When you ride it and put it under a load, it just kinda barfs. Acts like a cylinder is cutting out. I'll list what all I have done to it below. I will also post a vid of it starting, idling and revving stationary. The second video is a short vide of me taking off on it and it barfing. Its only 6 seconds but it's too dang cold to get a better vid tonight. But you can see it take off and as I get in the gas you can here it barfing. If you dont see the vid yet its still uploading. I'll adjust post when they are available.
Here is what I have done so far:
Installed brand new battery has about 14.2 volts under all running conditions as expected.
Cleaned carbs..twice. Second time was just to verify I didn't miss something. All jets clean. Everything moves as it is expected. Frankly I've seen worse carbs but both the main and pilot are now clear as is everypassage that can be cleaned. Chokes work as they should. Both plugs for idle air screws are removed and screws adjusted to best idle.
Air filter like new.
Changed oil
Checked all electrical connections to make sure nothing was corroded. Everything looked good. Front cylinder coil had a slight bit of moisture where coil wires went in. I did trim both ends and reinsert and lock down.
Changed oil and filter.
Brand new plugs at all four.
Brand new OEM fuel pump. Original was just dead. Verified pump is pumping.
Brand new fuel filter.
Bypassed kick stand switch to take it out of the loop.
Put a timing light on it and rode it to make the problem occur while observing the spark pattern. Have to admit when problem was happening it did seem as if the spark was not consistent. This was the same for both front and rear cylinders. I would have thought if I had a problem with an individual coul I would only see oddness on one coil, not both. Regardless at no time when the problem occured did I lose spark completely.
If you have ever ridden an ATV with a really dead battery (that would at least fire off with a pullstart) it is acting like that as if it has enough spark to run without load but not strong enough to fire properly under load.
I have read there is a pulse generator, and I have a manual from this site but don't know what years it covers. I am yet to see the pulse generator. Does the 2003 Spirit have one? Where is it at? Under cover with stator?
So anyone have any ideas? Ears open!! Videos to follow. Internet is slow.
Here is vid of it falling on face:
http://youtu.be/RQfcCLKjUf0
Video of it starting and reving
http://youtu.be/exL7G4VXQ5g
I have cleaned literally over 100 carbs in the last 5 years. I'm pretty familiar with them. If you've ever had to RnR shadow twin carbs you know they are no treat!
Anyways the problem is the bike starts, idles perfect, revs great....all when not under the load of actually riding it. When you ride it and put it under a load, it just kinda barfs. Acts like a cylinder is cutting out. I'll list what all I have done to it below. I will also post a vid of it starting, idling and revving stationary. The second video is a short vide of me taking off on it and it barfing. Its only 6 seconds but it's too dang cold to get a better vid tonight. But you can see it take off and as I get in the gas you can here it barfing. If you dont see the vid yet its still uploading. I'll adjust post when they are available.
Here is what I have done so far:
Installed brand new battery has about 14.2 volts under all running conditions as expected.
Cleaned carbs..twice. Second time was just to verify I didn't miss something. All jets clean. Everything moves as it is expected. Frankly I've seen worse carbs but both the main and pilot are now clear as is everypassage that can be cleaned. Chokes work as they should. Both plugs for idle air screws are removed and screws adjusted to best idle.
Air filter like new.
Changed oil
Checked all electrical connections to make sure nothing was corroded. Everything looked good. Front cylinder coil had a slight bit of moisture where coil wires went in. I did trim both ends and reinsert and lock down.
Changed oil and filter.
Brand new plugs at all four.
Brand new OEM fuel pump. Original was just dead. Verified pump is pumping.
Brand new fuel filter.
Bypassed kick stand switch to take it out of the loop.
Put a timing light on it and rode it to make the problem occur while observing the spark pattern. Have to admit when problem was happening it did seem as if the spark was not consistent. This was the same for both front and rear cylinders. I would have thought if I had a problem with an individual coul I would only see oddness on one coil, not both. Regardless at no time when the problem occured did I lose spark completely.
If you have ever ridden an ATV with a really dead battery (that would at least fire off with a pullstart) it is acting like that as if it has enough spark to run without load but not strong enough to fire properly under load.
I have read there is a pulse generator, and I have a manual from this site but don't know what years it covers. I am yet to see the pulse generator. Does the 2003 Spirit have one? Where is it at? Under cover with stator?
So anyone have any ideas? Ears open!! Videos to follow. Internet is slow.
Here is vid of it falling on face:
http://youtu.be/RQfcCLKjUf0
Video of it starting and reving
http://youtu.be/exL7G4VXQ5g