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QUESTIONS ABOUT THE SITE? TROUBLE REGISTERING? ADMIN@DOTHETON.COM

Author Topic: 1978 Yamaha XS650  (Read 18856 times)

Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Re: 1978 Yamaha XS650
« Reply #150 on: Oct 07, 2012, 23:42:43 »
Well I ordered the set from alphamoto.com and they came jetted for an xs650 that is stock or slightly modified. Not sure of the jetting I was just going to fire it up tomorrow and see how it runs and make changes as needed.  If you have any suggestions that'd be awesome.  Dont really like how the choke works of the right carb because it is hard to get to but I think I have a solution.
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration

Offline DreadRock

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  • Posts: 2033
  • Bang Cut Grind ..Dam Did I Need That Part ?
Re: 1978 Yamaha XS650
« Reply #151 on: Oct 08, 2012, 00:09:46 »
If you can please post on what you do with the choke as mine are the same and dont know have any ideas !

Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Re: 1978 Yamaha XS650
« Reply #152 on: Oct 08, 2012, 01:16:12 »
Yeah I can do that when I figure it out. Any help on how to get my 2-1 throttle cable installed would helpful. Never put one on that I had to cut to length and solder.
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration

Offline Captmilk76

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Re: 1978 Yamaha XS650
« Reply #153 on: Oct 08, 2012, 02:19:06 »
I have the same setup, i manually turn on and shut them off one at a time. The clutch side i have a on off mounted and the other side is stock like below

http://4.bp.blogspot.com/-p1iabGoU3Is/ToKDjsSlCjI/AAAAAAAAB-I/9Jng987szhs/s1600/3.JPG

Sent from my DROID RAZR using Tapatalk 2
« Last Edit: Oct 08, 2012, 02:24:10 by Captmilk76 »

Offline Tim

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Re: 1978 Yamaha XS650
« Reply #154 on: Oct 08, 2012, 02:25:24 »
Ok, for the right side carb, you need to get a 'plunger' choke mechanism for it.  It just replaces the lever mechanism with a simple knob you pull up.

It's not really a choke per-se, as there is no butterfly.  It's an enrichment circuit - they call it the starter circuit but everyone of course still calls it a choke.  The plunger kit is $10 or so.

You already have the proper right-side carb body, which is why the idle adjustment screw is on the opposite side of the left carb body.  Many people end up getting two left side carbs which makes adjusting your idle a pain.  Sadly the air screw on the left carb is still on the inside, but it's easy to reach with a long screw driver.

I'll dig out my jetting.  You probably have a 25 main, 180/190 pilot, 2.5 slide.  Can't recall the needle or needle jet specs.  There is an 'air jet' which goes in the air intake bell.  On my jetting it is removed.
Zed's dead baby... Zed's dead.


Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Re: 1978 Yamaha XS650
« Reply #156 on: Oct 08, 2012, 15:43:21 »
Tim  Thanks for the suggestions. As for the jetting I do remember the main being a 180 when I took the bowl off but I cant remember the pilot.  I think for now Im gonna focus on getting everything hooked up and running and then go the plunger choke. 


Sbaugz - The pipe is just a mac 2-1 and the muffler is from cyclexchange.
« Last Edit: Oct 08, 2012, 16:37:36 by Cloyd »
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration

Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Re: 1978 Yamaha XS650
« Reply #157 on: Oct 18, 2012, 22:01:17 »
Cut and painted my front fender to match my tank
« Last Edit: Oct 19, 2012, 04:30:27 by Cloyd »
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration

Offline jfman

  • Posts: 138
Re: 1978 Yamaha XS650
« Reply #158 on: Oct 23, 2012, 22:01:30 »
The bike looks awesome with the fender like that. How did you cut it to get nice edges like that? Cutoff wheel?

Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Re: 1978 Yamaha XS650
« Reply #159 on: Oct 23, 2012, 23:01:52 »
Thanks. Just used a cutoff wheel and bench grinder.
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration


Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Re: 1978 Yamaha XS650
« Reply #161 on: Oct 24, 2012, 01:35:58 »
Yeah I'm  kind of an idiot. Ive been riding with the rear brake only because I haven't gotten a new master cylinder yet. But I picked one up at barber I'll be adding soon
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration

Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Round 2....Back to the drawing boards!
« Reply #162 on: Dec 06, 2012, 21:21:14 »
Well I decided I wanted to change the way my seat mounts so I'm also making a new electrical tray. Oh yeah and the seat loop is going back on.
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration

Offline Cloyd

  • Posts: 458
  • If it feels good....do it....
Re: 1978 Yamaha XS650
« Reply #163 on: Dec 13, 2012, 23:10:06 »
Practiced up on my welding and put my original seat hoop back on. Also put a plate on it for mounting my new seat/lights. Welds are not great but its the best I can do with a cheap mig welder and no gas.  At least they are strong.
« Last Edit: Dec 13, 2012, 23:57:02 by Cloyd »
1975 CB550 Cafe  (Done Sorta)
1978 XS650 Cafe  (Work in progress) http://www.dotheton.com/forum/index.php?topic=34459.0
1977 XS650 Resoration

Offline DesmoBro

  • Posts: 1825
  • Busted Nut
Re: 1978 Yamaha XS650
« Reply #164 on: Dec 14, 2012, 01:14:26 »
flap disc on an angle grinder will clean that up , coming along tho good work
"I desire the things that will destroy me in the end"