LeBouc

If it's not the petcock filter than it can be the tube that connect the valve in the petcock to the right cylinder boot that is between...

Please, tell us if that was the issue so that the next person going through the same problem can find its answer here!

Hi Rob. Yes, it is safe to run the bike on prime; just don't forget to close it after riding otherwise, the pressure can force the fuel...

As tstidham said, valve adjustment has to be verified. Be careful because this engine has a 180 degrees crank and it is possible to try...

A car battery (the type that we use on our bikes) is designed to give a short but high burst of electricity to energise the starter...

Is it possible that the tube between the 2 carbs would be partially blocked? That way, the bowl would be emptied while you run and...

I prefer to have my mirrors attached closer to the steering stem because the further you are from it, the more amplitude the vibrations...

That's what I thought!

Almost. I have some pops when I close the throttle but I believe that it will be easy now to prevent them since the pilot screw is only...

Here is a copy of the drawing done with Google SketchUp (free); the black pieces are rubber seals that are expanded in the handlebar...

Somebody (I can't find who!) told me to balance my carbs, that it would make a huge difference. I did. And the effect is humonguous...

Original air filters

I have visually balanced them but I will check with my vacuum testers which might give me interesting infos. Also, I want to swap the...

kebabs: The only problem I had when I decided to open the carbs was starting when the engine was cold. It would start with only one...

tstidham, I checked and rechecked the passages and the jets and they are all free flowing. I can spray brake fluid and see it spaying...

I am done with it for this year! Too many other things to do before the snow covers the land (normally, it begins by mid october and...

Thanks, Kebabs. Those infos are precious as they will help me understand what is going on. I rode my bike again and things didn't go so...

So the problem was that the idle adjustment screw has been set very high to compensate for the pilot jet which was not set properly. I...

Good to know! Thanks. One thing, though: the bike only had a starting problem; other than that, it was running just fine!

carb holders are brand new! Vacuum hose and cap have been verified. No change to the bike; it is all original. I will shoot compressed...

Thanks. I'll try that but it's already opened 3 1/2 turns! What I have read is that 3 1/4 was what people were happy with!

Hi all. I have a problem with my XS400H and I think it's the carbs that are at fault. I just reajust the valves and the carburetors...