Alrighty, I just picked up a 1990 750 Kat three weeks ago.
The past week I've been plagued with a wierd stalling problem.
I've been riding along(mostly 50-60kph and less) when the motor cuts out as if I'd hit the kill switch. Sometimes I can quickly pull the clutch in, go up a couple of gears and release to bump start it. Often though, it's pull over to the side of the road and wait 20 minutes or so before it'll start again.
If I try to start it immediately after it stalls, you can hear at least one cylinder firing and the bike trying to start. As soon as I release the starter button it stalls out.
My suspicions are a heat related failure of some sort. The majority of the time it's happend I've been slowing down using engine braking with the RPM's hovering around 3500 - 4000 RPM. It usually happens at stop lights after slowing down and stopping. The bike idles fine at the red light, but as soon as I give it some gas to pull away it stalls dead. The last time it stalled I was coming down a somewhat steep hill in heavy traffic and using the engine to maintain speed. Once I got to the bottom I tried to accelerate and stalled out. Thankfully I was on my way to my mechanics to get a new rear tire and brakes installed, so they came to pick me up.
It's going into the shop today, but would appreciate any insight anyone here might have. The mechanic suspected that it may have been the kick stand kill switch so we disconnected that but the stalling problem persists.
The previous owner did mention that it did this very occasionally and would only do it for a few revolutions but start up immediately again. It's also had a few times in the mornings that it wouldn't immediately start, no spark. Wait 10 minutes or try to bump start it and away it goes. This certainly does sound like it's related.
The past week I've been plagued with a wierd stalling problem.
I've been riding along(mostly 50-60kph and less) when the motor cuts out as if I'd hit the kill switch. Sometimes I can quickly pull the clutch in, go up a couple of gears and release to bump start it. Often though, it's pull over to the side of the road and wait 20 minutes or so before it'll start again.
If I try to start it immediately after it stalls, you can hear at least one cylinder firing and the bike trying to start. As soon as I release the starter button it stalls out.
My suspicions are a heat related failure of some sort. The majority of the time it's happend I've been slowing down using engine braking with the RPM's hovering around 3500 - 4000 RPM. It usually happens at stop lights after slowing down and stopping. The bike idles fine at the red light, but as soon as I give it some gas to pull away it stalls dead. The last time it stalled I was coming down a somewhat steep hill in heavy traffic and using the engine to maintain speed. Once I got to the bottom I tried to accelerate and stalled out. Thankfully I was on my way to my mechanics to get a new rear tire and brakes installed, so they came to pick me up.
It's going into the shop today, but would appreciate any insight anyone here might have. The mechanic suspected that it may have been the kick stand kill switch so we disconnected that but the stalling problem persists.
The previous owner did mention that it did this very occasionally and would only do it for a few revolutions but start up immediately again. It's also had a few times in the mornings that it wouldn't immediately start, no spark. Wait 10 minutes or try to bump start it and away it goes. This certainly does sound like it's related.
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