Woutair
XS400 Member
Dear gentlemen,
My XS400 has developed a serieus problem that has me completely at a loss. Driving 60mph my '84 Maxim would occasionally skip a few beats and continuing like nothing ever happend. The problem would only arise after doing a few miles at highish rpm. Sometimes it would lose a lot of power as I throttled down exiting the motorway, only to be fine again after the bike was parked for a few minutes. I took it in to my local mechanics since I was short on time (since one week later I was gonna take the bike on a trip) and he concluded that the carb diapragms needed replacing. He managed to source new ones and replaced them.
Happy that it was fixed I set out on my journey, only to find within a few miles that problem was still there. I continued on, only to find myself on the emergency lane with a motorcycle that wasn't making any power and only capable of 40mph. After 15 minutes being off the motorway slowly driving to a relatives house, it would occaionally come back to full power before going again. it's been parked there ever since as I really have no idea what could have been the culprit.
When the bike lost power it would be:
-After doing around 20 minutes at 60mph
-It wouldn't rev beyond 5000 rpm
-It appeared to me that it was running on all two cylinders (Could have been mistaken in the heat of battle)
-The problem completely disappeared after an hour's cooldown, and it would run normal.
I have replaced the sparkplugs, cleaned the airfilter and the mechanic claims he cleaned the carbs as well as replaced the diaphragms. Oil changes and all regular maintenace have occurred as prescribed.
Please help me as I have no idea anymore. As this motorbike is my only transport I really want to get it back up and running.
My XS400 has developed a serieus problem that has me completely at a loss. Driving 60mph my '84 Maxim would occasionally skip a few beats and continuing like nothing ever happend. The problem would only arise after doing a few miles at highish rpm. Sometimes it would lose a lot of power as I throttled down exiting the motorway, only to be fine again after the bike was parked for a few minutes. I took it in to my local mechanics since I was short on time (since one week later I was gonna take the bike on a trip) and he concluded that the carb diapragms needed replacing. He managed to source new ones and replaced them.
Happy that it was fixed I set out on my journey, only to find within a few miles that problem was still there. I continued on, only to find myself on the emergency lane with a motorcycle that wasn't making any power and only capable of 40mph. After 15 minutes being off the motorway slowly driving to a relatives house, it would occaionally come back to full power before going again. it's been parked there ever since as I really have no idea what could have been the culprit.
When the bike lost power it would be:
-After doing around 20 minutes at 60mph
-It wouldn't rev beyond 5000 rpm
-It appeared to me that it was running on all two cylinders (Could have been mistaken in the heat of battle)
-The problem completely disappeared after an hour's cooldown, and it would run normal.
I have replaced the sparkplugs, cleaned the airfilter and the mechanic claims he cleaned the carbs as well as replaced the diaphragms. Oil changes and all regular maintenace have occurred as prescribed.
Please help me as I have no idea anymore. As this motorbike is my only transport I really want to get it back up and running.