doodsaibot
XS400 Addict
Last weekend I was riding on the highway at 75MPH. I hit an extremely rough bump in the road and instantly my bike started to bog down and lose power. I was able to pull over into the shoulder and come to a stop as the bike promplty cut out. I waited for a few minutes after inspecting the bike and fired it back up. I rode it back home and it would occasionally bog down on me again. It was as if the power was being cut in half when the issue would arise.
At any rate, I noticed at idle that the bike would cut off when I lock out the steering to the left. I have checked the wires and cables and don't notice anything out of the ordinary. I checked the probes that go into the gauge cluster and noticed the tachometer side probe was not screwed on so I fastened it back on and the bike no longer dies when I lock out the steering..well, not always. I checked any wiring from my HID kit and none of it is being stretched when the steering is locked out. I am scratching my head on this one.
All my basic maintenance is up to date.
Aside from the routine, I re-checked the vacuum on my carbs and I am pulling 7 in. Hg on both sides (per the manual) and even synced with the manometer afterwards. Checked inline gas filter and its all good. Petcock vacuum line is on snug and petcock is not leaking. I drained the tank out and refilled with fresh gas just to be on the safe side. Air filter is in great shape.
After the routine check ups, I rode about 25 miles (riding through various RPMs) with no issue until I got home and parked the bike, at which point it goes back to bogging down again. To keep the idle up I have to screw down the idle screw. The RPMs jump back up and I set the screw back to where it was. I can go ride another 20 miles with no issue until it randomly bogs down again. I have noticed this problem at all RPM ranges from idle, to mid, up to main jets above 7000RPMs.
I am going to give it another look over but if anyone else has had this issue or can give me a tip as to what I should look for, it would be greatly appreciated.
SIDE NOTE: I COMPLETELY rebuilt the carbs last year save the diaphragms since they were in great shape. I have been riding with the rebuilt carbs for several months without issue.
Is it possible something slipped passed the gas filter into the carb? Did a wire or cable come loose from the rough bump on the highway or is that part all coincidence? The problem itself is completely random so I am leaning towards carb cleaning...
At any rate, I noticed at idle that the bike would cut off when I lock out the steering to the left. I have checked the wires and cables and don't notice anything out of the ordinary. I checked the probes that go into the gauge cluster and noticed the tachometer side probe was not screwed on so I fastened it back on and the bike no longer dies when I lock out the steering..well, not always. I checked any wiring from my HID kit and none of it is being stretched when the steering is locked out. I am scratching my head on this one.
All my basic maintenance is up to date.
Aside from the routine, I re-checked the vacuum on my carbs and I am pulling 7 in. Hg on both sides (per the manual) and even synced with the manometer afterwards. Checked inline gas filter and its all good. Petcock vacuum line is on snug and petcock is not leaking. I drained the tank out and refilled with fresh gas just to be on the safe side. Air filter is in great shape.
After the routine check ups, I rode about 25 miles (riding through various RPMs) with no issue until I got home and parked the bike, at which point it goes back to bogging down again. To keep the idle up I have to screw down the idle screw. The RPMs jump back up and I set the screw back to where it was. I can go ride another 20 miles with no issue until it randomly bogs down again. I have noticed this problem at all RPM ranges from idle, to mid, up to main jets above 7000RPMs.
I am going to give it another look over but if anyone else has had this issue or can give me a tip as to what I should look for, it would be greatly appreciated.
SIDE NOTE: I COMPLETELY rebuilt the carbs last year save the diaphragms since they were in great shape. I have been riding with the rebuilt carbs for several months without issue.
Is it possible something slipped passed the gas filter into the carb? Did a wire or cable come loose from the rough bump on the highway or is that part all coincidence? The problem itself is completely random so I am leaning towards carb cleaning...