DanMach
XS400 Addict
So I've checked the valve clearance on my DOHC xs400 and was kind of shocked.
The problem I was having is that it was backfiring and refusing to start. This was about a month ago and while I cleaned the carbs right away I also wanted to adjust the valves. I finally found the time and energy to do so.
So I pulled everything apart, lifted the valve cover off the engine, and set to measuring the clearance. I went by the manual which said to position the cam lobe pointing away from the valve and then measure it using feeling gauges.
I came up with these[Left/Right is from sitting on the bike looking down at the engine]:
Left Exhaust - .09mm
Right Exhaust - .08mm
Left Intake - .11mm
Right Intake - .10mm
I have checked these three times and had my brother also check them.
The manual leasts these as the acceptable clearances:
Intake: .11 - .15mm
Exhaust: .16 - .20mm
So you can see that the intake is just on the inside of that range, but the exhaust is far more off. Is this considered a normal range for something to be off? I've never done anything with valve adjustments before and I don't know if .07mm is normal, or possibly an indication of something else??
Thanks in advance everyone
The problem I was having is that it was backfiring and refusing to start. This was about a month ago and while I cleaned the carbs right away I also wanted to adjust the valves. I finally found the time and energy to do so.
So I pulled everything apart, lifted the valve cover off the engine, and set to measuring the clearance. I went by the manual which said to position the cam lobe pointing away from the valve and then measure it using feeling gauges.
I came up with these[Left/Right is from sitting on the bike looking down at the engine]:
Left Exhaust - .09mm
Right Exhaust - .08mm
Left Intake - .11mm
Right Intake - .10mm
I have checked these three times and had my brother also check them.
The manual leasts these as the acceptable clearances:
Intake: .11 - .15mm
Exhaust: .16 - .20mm
So you can see that the intake is just on the inside of that range, but the exhaust is far more off. Is this considered a normal range for something to be off? I've never done anything with valve adjustments before and I don't know if .07mm is normal, or possibly an indication of something else??
Thanks in advance everyone