spark

Cheers to everyone here for keeping the legend alive and for all the exciting discussions and troubleshootings. I’m an avid reader for a few years now, but never posted myself. Well now it’s time. My father passed on to me his 447 XS, it‘s a chopper conversion by the Germans from HM, also...

Hey Friends, Due to an injury, my 81 XS650 Sat partially assembled for 15 years. For the past few months I’ve gotten her ready to go but for one thing….she won’t start. Holding the plug to the engine case produces one fairly strong spark each time I push the starter button, then no spark. Tried...

Hello, I recently aquired a 1979 XS650 SF with a points ignition system. The bike has no spark and while trying to diagnose it I decided to set the points. I watched a video on youtube () that shows how to set the points. Included in that link is a timestamp to where he uses a 12v test light to...

Hello, I just rebuilt my engine and replaced a fair number of parts, and I am now having an odd problem statically timing the spark. Known variables: I do not know when the last time the engine ran before I rebuilt it. I had Hugh's Handbuilt rebuild the crank, it is not rephased. I...

Hello all, I've sketched up a wiring diagram for my 1975 XS650B, which is a hardtail chopper project. it has the stock alternator, as well as: a TCBro's reg/reg: http://www.tcbroschoppers.com/regulator-rectifier-yamaha-xs650-points-ignition-models.html. a TCBro's headlight...

Hi all, new to XS650s, but I have some experience with motorcycles in general. Long story short, bought a 650 with HHB’s Pma system installed, kickstart only, no battery, sparx capacitor. Bike worked great when I went to check it out, I rode it home no problem. Next day I go to start it and...

1978 xs650se. Her names Rose. Pamco ignition with e advancer. Pma and Reg/rec. removed old wiring and re wired. Removed safety relay and the two light relays. New dyno dual tower ignition coil. With new plugs and wires. New battery. New headlight. I don’t get it man. Could it be the Pamco/...

So I'm having an odd problem with my 1980 XS650 that has seemed to develop within the past couple of weeks. Whenever I go to start the thing with the electric starter, it will crank over perfectly fine but won't fire up until I let off the starter button (when the engine is attempting to slow...

Hey everyone I'm new here so bare with me... So, I got this crazy idea a couple months ago that I wanted to build a bobber out of a xs650 even though I had no prior experience working on motorcycles but plenty with working on cars and I consider myself an easy learner when it comes to...

Hello everyone! I have an XS 750 with the points system. Only the third cyclinder wants to spark. Everything else will spark if I manually lift the point up and down. As soon as I use the ignition switch, spark is gone. I'm so confused with this. Anyone have suggestions? Thanks in advance!

So my dad and I went for a 2 day ride to Vermont and at 400 miles away from home my bike died. Here is what happened -backfired extremely loud then completely shut down. Didn't start but barely fired twice, followed by nothing the next 2 dozen attempts. Would not start with starter fluid in the...

Hi guys, I have a '72 Yamaha xs2 650 that I restored. It has carburetors mikuni bs38 (clean new diaphragm), new tank, new air filter. It also has new spark plugs but, they turn black and greasy on the ends. I believe the mixture is rich. How do I fix that? Should I change the needle high...

Hello all, recently acquired a 1980 650 Special to add to my collection. Previous owner says they replaced some gaskets and then could not get bike to start. They then put the bike on the "back burner" so to speak and I bought it complete for $200 a few days ago. They think the timing is off...

I am running the pamco ignition with mikesXS part number 17-6803 with a primary resistance of 2.7 ohms. i am getting very random & sporadic spark only, and never enough to get the bike running. when checking for spark, i am able to get a smaller plug to produce less of this sporadic spark...