-
Enjoy XS650.com? Consider making a donation to help support the site.
XS650.com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going.
79 xs650 Special - No Spark... But 12v. help?
- Thread starter dhx78
- Start date
-
- Tags
- electrical engine
Pabeye
Older than Dirt
Roger that 5Twins.but honestly I don't think it was lack of care that caused the tube to brake on the original set of carbs.........the break was right where there is a hole, and I do believe there was some weakness there caused by corrosion. But I will be careful both with my repaired set and the new ones too. Thanks for all your efforts to keep the XS alive and to help those interested in the bike.
In any case, luckily, there seems to be a good supply of the Mikuni VM 34mm for Carburetor ( new ) which seems to work too.......in case I mess up again...
In any case, luckily, there seems to be a good supply of the Mikuni VM 34mm for Carburetor ( new ) which seems to work too.......in case I mess up again...
Last edited:
Pabeye
Older than Dirt
The new set of cars, which are BS 38's like the ones that came on the bike have a few orifices that the others do not. Here is a pix of what I am talking about. I didn't notice anything about these differences in the carb guide, but the info may be there as i am not a very good fast reader anymore. Thought you guys might be able to tell me what they are since they did not come with a bike attached.
I don't know how to deal with these barbs when I try these carbs on the bike. Do they need to be plugged like the vacuum barb on the intake manifold? The items in question are circled in red. Thanks as always. I am in the middle of rebuilding these carbs, bought a carb rebuild kit from Mike....hopefully I will not brake anything in the process this time! I think it will be interesting to try these new carbs on the bike and see if that 2000 RPM idle issue is any different. Thanks as always.......
I don't know how to deal with these barbs when I try these carbs on the bike. Do they need to be plugged like the vacuum barb on the intake manifold? The items in question are circled in red. Thanks as always. I am in the middle of rebuilding these carbs, bought a carb rebuild kit from Mike....hopefully I will not brake anything in the process this time! I think it will be interesting to try these new carbs on the bike and see if that 2000 RPM idle issue is any different. Thanks as always.......
The upper are float bowl vents. The long used to be clear tubes help keep crud out.
The lower are float bowl over flows. Long hoses ran from them to below and the rear of the engine so any gas over flow would fall on the ground.
Leo
The lower are float bowl over flows. Long hoses ran from them to below and the rear of the engine so any gas over flow would fall on the ground.
Leo
Pabeye
Older than Dirt
Thanks Leo!
Pabeye
Older than Dirt
So, I rebuilt the "new" carbs.........almost "new" everything....jets, choke plungers, gaskets etc. from Mikes ......put 'em on the bike......had trials and tribulations because I changed the wire going to the points too...........but FINALLY......I THINK it is sorted out..........nice 1200 RPM idle, good throttle response.....running on BOTH cylinders....check out the neat UNI pods! ...I'll run it one more time and then I will take the motor out and start the fun stuff........cleaning, painting and turning the old beast into "something else"
the video is here........
http://s271.photobucket.com/user/pa...osts/newcarbstart-iPhone_zps3ab81d01.mp4.html
THANK YOU one and all for your advice, assistance, AND support!
the video is here........
http://s271.photobucket.com/user/pa...osts/newcarbstart-iPhone_zps3ab81d01.mp4.html
THANK YOU one and all for your advice, assistance, AND support!
Pabeye
Older than Dirt
The last pix of the old girl before I take 'er apart again and clean up the rest of the frame, paint various pars, buy new stuff, rebuild the brakes, investigate the condition of the suspension, etc. etc. As of now, idle is good at about 1200 RPM. Throttle advance seems good, and both cylinders are firing. I'm sure other issues will creep up. but till them.......
Thanks one and all for all your help thus far, could NOT have done it with out you guys!
Thanks one and all for all your help thus far, could NOT have done it with out you guys!
Pabeye
Older than Dirt
SLOWLY.......beginning to clean, paint, and rebuild the 650.......here's a pix of the cleaned and painted rims waiting for new hoops. The color scheme is going to be chrome yellow (otherwise known as "school bus yellow"....LOL ) on black
Pabeye
Older than Dirt
Well, it's been a long time since I've had time to work on the bike or post on the board.....I had a chance to work on the bike today. The task was to cut the tail section of the upper frame and after cutting to the proper angle flipping it upside down so it fits under the back of the cafe racer seat and then welding it back on.
I used Lincoln welder borrowed from a friend. First welding I've done in over 40 years, ( I always preferred oxy /acetylene) but after a little practice, it was all good ( YEAH YA HAVE TO PULL THE TRIGGER or ya don't get an arc! )
The welds were ugly, but I think they are strong enough for my purpose. PS I bought a "self darkening" welding helmet at Harbor Freight that allows one to see exactly where that tiny welding wire is above the work surface.......Made the process SO MUCH EASIER!!!
I used Lincoln welder borrowed from a friend. First welding I've done in over 40 years, ( I always preferred oxy /acetylene) but after a little practice, it was all good ( YEAH YA HAVE TO PULL THE TRIGGER or ya don't get an arc! )
The welds were ugly, but I think they are strong enough for my purpose. PS I bought a "self darkening" welding helmet at Harbor Freight that allows one to see exactly where that tiny welding wire is above the work surface.......Made the process SO MUCH EASIER!!!
Pabeye
Older than Dirt
Well, It's been almost two years, but here is the result.......NEVER could have done it without the help of generous people on this board.THANKS!!
My old XS is 99% OK............just one or two issues to resolve tweeking mostly.....
1) plugs are a perfect color, but she starts "breaking up" at about 5.5K RPM.....
2) some backfiring from the right cylinder when I ease off the throttle
3) idle is a bit high 1500 or so
There ya have it......Thanks everyone for your advice and support.
My old XS is 99% OK............just one or two issues to resolve tweeking mostly.....
1) plugs are a perfect color, but she starts "breaking up" at about 5.5K RPM.....
2) some backfiring from the right cylinder when I ease off the throttle
3) idle is a bit high 1500 or so
There ya have it......Thanks everyone for your advice and support.
