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Replaced my Boyer ignition and the problem was solved :).

Found it. The vacuum hose between the tank and the left cilinder had a little crank causing an air leak.

Hi guys, I have an XS650 from '83 with electric ignition. A few months I did an annual check and corrected valves and timing. Recently I start noticing that my left cylinder is backfiring a bit (especially when running idle or when decelerating). Also when holding my hand behind the exhaust I...

I noticed these intake holes in my air filter and they seem to bypass the filter itself. The previous owner seem to have closed them provisionally using caps but I guess I lost one. The bike runs fine though. However, I don't like the fact the filter itself is partially bypassed. What is the...

A few weeks ago I removed my ignition (Boyer Bransden) on my XS650SJ ('83) because it's bleeding oil due a failing seal. I didn't know putting it back was influencing the timing (still learning). After putting it back, it bike was running fine although the RPMs went down a bit when running idle...

I mean turning off and on my ignition key. Basically that "resets" the ignition immediately starting my engine again when in gear and my bike is still rolling. I know resets sounds silly but for some reason that gets the thing going again. Until I haven't turned off and on my ignition key, it...

@angus67: one of my spark plugs was replaced a few weeks ago as the resistance was signifiant higher than the other one. This actually solved the issue I had back then. I looked into the manual and the following is described about the sidestand relay: The sidestand relay operates by shorting...

Thanks, I will definitely start looking at this. One additional thing that came to my mind is that when the engine cuts out when riding, I can easily restart it by simply switching the ignition switch to off and on. I have not tried this with my kill switch as that hopefully has the same...

Hi, first post here and happy to see the activity of this forum. I have a 83' XS650SJ with a Boyer Bransden ignition that runs fine when warm. A few weeks ago my bike started acting strange as it stopped running while driving and in most cases after rolling out with the engine turned off it...