Post by polishdupa on Jul 21, 2020 18:01:32 GMT -5
I’m at a loss... I have an 81 XS650 Special. I was experiencing a lot of popping out of my exhaust. I was told that cleaning the carbs would probably solve that problem. So, like an idiot, I went for it. After cleaning the carbs, life happened and my bike sat, unassembled, for a year or 2. I finally was able to put the carbs, gas tank, and air filters back on. I went to start the bike, and it sounded like it wanted to start, but just wouldn’t turn over.
My battery is newer, and was on a tender, and my connections are clean; my plugs were pretty new. Then it dawned on me...old gas! I drained my tank, added new gas. I tried getting it started, and eventually I could get it to turn over and run, but only for about 20 seconds, and then it peters out.
So my routine every couple days is, take the battery off the tender, fiddle with the idle screw, get it to run for a few seconds, get mad, shut it off, put the battery back on the tender, repeat.
The other day, my father suggested changing the plugs, so I did. It started right up! 30 seconds later it petered out.
A friend of mine seems to think it the mixture, but I can’t find a picture or a diagram of the location ANYWHERE online. I tried the carburetor thread on this site, but the pics won’t load. There’s no mechanics in my area that will work on a bike as old as mine, and I dont even know how I would get the bike to a mechanic that would be willing to do the work! HELP!!!!!
On the carbs try www.amckayltd.com/carbguide.pdf I have it saved on my computer. So pics load just fine. When you look at the top of the carbs there is a tower that sticks up. Thus tower has a plug in it. Under this plug is the idle mix screw. If you didn't remove this plug and the mix screw under it you didn't get your carbs clean. On the idle mix circuit, the fuel mix from the pilot jet flows through a passage to the mix screw. Part of this fuel mix flows straight to a hole by the throttle plate. Part of this mix flows through the mix screw and comes out the three tiny holes by the throttle plate. When cleaning that passage can't be cleaned out with the mix screw in place. Leo
75 XS650B with 79 forks and dual disc, braided lines, disc brake on back, Pamco ignition, Pamcopete's reg/rec mods, kill switch relay, home made harness, all LED turn, brake and tail lights, tapered head bearings, bronze bushes in swing arm, soon to get shock and fork upgrades
r80rt: :)This is a splendid write up, THANK YOU!!!!
Dec 26, 2015 16:54:05 GMT -5
mashermoto: What the what is this shoutbox for? Or should I shout, WHAT THE WHAT IS THIS SHOUTBOX FOR!
May 12, 2016 22:22:21 GMT -5
motormike: Good Day ...just a FYI.. Wild Cat is this Labor Day weekend. Still go'n on. A few 650's still make the scene. Various rides at different skill levels each day.. awards dinner sunday eve. BS in the park'n lot after dinner.
Aug 23, 2016 7:57:01 GMT -5
lsettle: First post in over 6 years!
Aug 28, 2016 19:45:17 GMT -5
kardon: Wow quiet here, where did they all go.
Oct 7, 2016 2:18:13 GMT -5
gggGary: XS650.com LOL
Feb 16, 2017 20:49:02 GMT -5
buell88: Anybody have any idea who built the xs650 tracker used in the Draggin Jeans Ad on Pipeburn?
May 16, 2017 16:24:09 GMT -5
joshua: The regulator/rectifier unit I got from Mikes PMA has closer hole spacing than original. Are we supposed to mill the holes to fit?
Jun 7, 2017 19:25:58 GMT -5
joshua: My bad. I found the bracket they supplied to mount the rectifier/regulator... Uh oh. How is this meant to work? Which way is it meant to mount? Looks like I have to use some spacers or something. Good instructions would be nice.
Jun 7, 2017 22:09:52 GMT -5
craig8johnson: Not sure if this is the right spot or not but oh well...
Jul 11, 2017 18:04:15 GMT -5
craig8johnson: I'm checking the charging system. I'm afraid I might have fried the last battery. With the solid state regulator (after market) what should it be charging at. The book says, I think, 15 volts. I'm hitting 17 when revved. Is that too high?
Jul 11, 2017 18:06:19 GMT -5
gggGary: Yes 17 volts is too high, about 14 volts is max, sounds like you don't have the right regulator or it's wired wrong.
Jul 13, 2017 6:54:33 GMT -5
dean: Just saying Hello, new member who is going to fix up a 79 XS650 that has seen its better days. I will definitely have lots of questions coming up.
Jun 23, 2018 16:45:32 GMT -5
tt650: Trying to breathe life into a 1980 that's been stored (indoors) for 25 yrs. Air filters are dry rotted. Have cleaned carbs but she only runs briefly on choke then stops. Need jet setting info and other ideas that might help her idle and rev.
Jul 3, 2018 19:15:19 GMT -5
trix13: Hey everyone! New to the forum and am fighting those gremlins!! New charging system, ignition switch, coil and fuse box. Resistance is higher than normal on the ignition pick up so I'm trying to find one. No such luck yet.
Aug 16, 2018 8:50:48 GMT -5
trix13: Also, even though all of my connections are clean, I cannot seem to find out why , when at higher rpms, I hit the signals and the rpms pulse with the signals...hahah. same with the brake light. I appreciate all input!!
Aug 16, 2018 8:55:08 GMT -5
bob99: how do I post a question. I am new to the forum
Jun 6, 2019 10:52:10 GMT -5
adlpc: Hello all! Been enjoying your edifying posts and discussions - and as a fan of the XS650 since my early teenage years happy that I now own a 1980 Special which I plan to turn into a vintage half faired racer. Thank you all for being here!
Oct 1, 2019 0:58:56 GMT -5