I've noticed two problems that I suspect are related in my 94 rd07:
When in neutral at a stop with the clutch lever out, the engine will occasionally "skip"...almost feels like something is catching the engine briefly. If the engine is cold this can cause it to stall.
When in neutral at a stop with the clitch lever out, the engine sounds rough when I pull the throttle. If I pull the throttle with the clutch level pulled in, the engine sounds just fine.
I can't find any evidence that the clutch is slipping (I've tested the clutch at speed)...but I still suspect the clutch is the problem. Anyone have any ideas?
Despite my last few posts describing problems, I love this bike! :thumbleft:
I've noticed two problems that I suspect are related in my 94 rd07:
1. When in neutral at a stop with the clutch lever out, the engine will occasionally "skip"...almost feels like something is catching the engine briefly. If the engine is cold this can cause it to stall.
2. When in neutral at a stop with the clitch lever out, the engine sounds rough when I pull the throttle. If I pull the throttle with the clutch level pulled in, the engine sounds just fine.
How rough? Mine does run quieter when the clutch is pulled in but I think they all do that. Any chance you could post a video so we can listen to it? Nice bike BTW!
Two issues come to mind:
Carburettors synchronized? Chain and front sprocket ok (and no difficulties shifting gear when not moving)?
Does the rear wheel turn when bike on center stand and engine idling in Neutral?
Reading the symptoms, I'm wondering if we've had anything like this before. It's quite difficult to diagnose with just a line of text, so a video might help.
In my mind, it seems like the symptoms are less severe with the clutch pulled in? This is obviously when there are less parts moving inside the engine, and consequently less drag/friction.
I'm going to suggest that a good place to start would be checking the entire choke assembly to make sure one of the (3) cables are not binding, and that neither of the choke plungers or the springs are stuck.
Whilst doing this I would balance the carbs anyway.
If this proves inconclusive, you need to determine if it is something mechanical or electrical, and I'd check the following...
Ignition circuit, and safety (cutout) circuit.
Ignition pickup and connections
CDI connections and CDI.
Check all the 4 HT leads (plug wires) are all secure, and the plugs tight.
Check the 2 blanking bolts for the vacuum takeoffs are secure on the intake side of the carbs.
Check the rubbers between the carbs annd airbox (do not overtighten clamps)
Clutch assembly, check the big nut that holds it on, and the arm and thrust assembly.
My gut feeling is that it is something simple rather than a major job. AT engines are pretty much bullet proof.
You don't metion whether this is a sudden fault or something that's got progressively worse??
Reading the symptoms, I'm wondering if we've had anything like this before. It's quite difficult to diagnose with just a line of text, so a video might help.
In my mind, it seems like the symptoms are less severe with the clutch pulled in? This is obviously when there are less parts moving inside the engine, and consequently less drag/friction.
I'm going to suggest that a good place to start would be checking the entire choke assembly to make sure one of the (3) cables are not binding, and that neither of the choke plungers or the springs are stuck.
Whilst doing this I would balance the carbs anyway.
If this proves inconclusive, you need to determine if it is something mechanical or electrical, and I'd check the following...
Ignition circuit, and safety (cutout) circuit.
Ignition pickup and connections
CDI connections and CDI.
Check all the 4 HT leads (plug wires) are all secure, and the plugs tight.
Check the 2 blanking bolts for the vacuum takeoffs are secure on the intake side of the carbs.
Check the rubbers between the carbs annd airbox (do not overtighten clamps)
Clutch assembly, check the big nut that holds it on, and the arm and thrust assembly.
My gut feeling is that it is something simple rather than a major job. AT engines are pretty much bullet proof.
You don't metion whether this is a sudden fault or something that's got progressively worse??
Well, after doing a service on my bike which included new oil, valve clearances and syncing the carbs it appears that all my issues have gone away. I'm thinking that it was the carbs being out of sync.
I'll keep an eye on it. Thanks for everyone's help!
I think it was sticky choke syndrome, so it may return. Usually the tickover gets turned up to compensate for the tickover dropping with a warm engine.
I note that on the Rugged Roads website they are now selling metal choke bodies which should make keeping them clean a lot easier.
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