With the engine running?
If there isn't any sparking across the points gap with the engine running, the condensers are probably good. In my experience, a bad condenser is obvious due to the big fat sparks as the points open.
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72 xs2 bogs down and backfires out of carbs, out of ideas
- Thread starter RaceCar1983
- Start date
If there isn't any sparking across the points gap with the engine running, the condensers are probably good. In my experience, a bad condenser is obvious due to the big fat sparks as the points open.
RaceCar1983
XS650 Enthusiast
Engine off, key on.
I am surprised at readings over 13 to 14 volts. I would have expected numbers like that on a running engine.
Nothing to be sorry about Cooperation for Progress
We have Coil resistance
We have Voltage on Points
Now the lead is the Condenser .based on experience Others chime in with their experience
Normal solution process ..checking and then moving on to next issue
Getting this show on the road so to speak
RaceCar1983
XS650 Enthusiast
I have checked the original condenser with this method: http://mgaguru.com/mgtech/ignition/ig128.htm
Mine seems to have good voltage but it is hard to tell because my multimeter doesn’t go high enough in range. I will replace it anyways and test start again.
RaceCar1983
XS650 Enthusiast
UPDATE: I installed a brand new regulator rectifier and now she won’t start at all. I get one gunshot type backfire when I kick it over and nothing else.
Checked timing and it was good. Any ideas?
Checked timing and it was good. Any ideas?
That's usually the result of crossing the coils. Left goes right and right to left.
Did you have the wiring between the points and coil disconnected? If you did I'd look for those wires being crossed.
AUTOMAN
XS650 Addict
condenser
or what jim said
RaceCar1983
XS650 Enthusiast
RaceCar1983
XS650 Enthusiast
No change in bogging down after un-crossing the wires, with a brand new condenser.
I’m fresh out of ideas.
RaceCar1983
XS650 Enthusiast
I also noticed some fuel leaking out of my carb vent tubes on the last start. Should I pull carbs and confirm float bowl height? I’m running PWK 32’s from Mikes.
Yep. sounds like either the float level is off or the float valve isn't seating properly.
RaceCar1983
XS650 Enthusiast
Ok, I will set the level and make sure it’s not getting hung up by anything via this article: https://www.jrcengineering.com/wp-content/uploads/2016/03/JRC-Carb-Tuning.pdf
Then I will do another test start tomorrow when it gets warm again. Fingers crossed.
While you're in the carbs, write down the size of the main and pilot jets. Might help us figure it out.
I haven't read through this whole thread, so pardon if this has already been discussed....
I just noticed you're from Colorado. Don't know what part, but if you're at 5-6000 feet, your carbs are prolly a little rich. Like 1 or two jet sizes too rich.
Also not familiar with the carbs that MikesXS sells or if they jet them specific to the XS. But if they do, they likely jet for sea level.
I just noticed you're from Colorado. Don't know what part, but if you're at 5-6000 feet, your carbs are prolly a little rich. Like 1 or two jet sizes too rich.
Also not familiar with the carbs that MikesXS sells or if they jet them specific to the XS. But if they do, they likely jet for sea level.
Picture of Spark Plugs after bogging Down ?
RaceCar1983
XS650 Enthusiast
Well it wouldn't hurt to go one size leaner on the pilot and main... while you're already in the carbs for the float.
At least that way you changed things up. Try it and see if there's any change in your symptoms.
At least that way you changed things up. Try it and see if there's any change in your symptoms.
Feels . a bit strange that both sides not working all of a sudden -- But if petrol is flooding ...Sure it can be the carburetors
have a sneaking suspicion that it still is something with the Points or Electrical
If I recall correctly, there are threads here from 10 years or more ago about those Taiwanese imitation Keihin flat slide carburettors. Almost nobody ever seems to have got them running correctly. Could be worth the OP doing a forum search and a bit of reading about those carburettors?
