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Chokes/Bogs down at mid-upper speeds (newbie)

  • Thread starter Thread starter Busbis
  • Start date Start date
20160331_163600.jpg
It does look as if they're fouled! So what's my plan of action? Before I posted I had tried running with the gas cap off--No help :/

For the past two days I believed the issue could have been from the igniter unit/CDI system..My issue was that the igniter unit was not actually supposed to ground to the frame through the metal backplate, however I fixed that issue with a ground wire to the frame, no luck as of an hour ago on the acceleration although the electricals are seemingly fixed!

As far as my petcock setup; I think I confused y'all, I don't mean to say the vacuum and fuel line are incorrectly routed currently. The hose from the vacuum line was stuffed on top of the fuel line nipple only to prevent the gas from spewing all over my garage. They're properly in tact and in place now.

I used a standard fuel line in place of the fuel filter, still having the issue today. I'm not quite sure what is meant by checking my coils for resistance. I will research tonight and figure it out, additionally I'll clean the gas cap (because why not). Side note--Can an electrical issue be the cause of this? My rectifier is absolutely disgusting and once I have a long enough break from classes I'll figure out what it does and how to properly clean or replace it.

I live in Lake Zurich, I have no problem riding the bike over somewhere also! I really appreciate that offer and all the responses I've received, learning a lot over here.
 
20160331_163710.jpg
Can't figure out how to post more than one photo per comment, but here's another. If it's any help I'll post the remaining two. I believe this is for cylinders 1 and 4.
 
Plug 3(M. Right).jpg
Plug 3 (mid-right)
The petcock seems to be seeping fuel, could this be the reason for the fouling? Or could the vacuum line have been flooded with gas causing this?
Additionally--My baffle had fallen off a few days ago. Could this impact anything?
 
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Can't see the end of the plug that is supposed to represent #1 and #4, but it looks a bit dark. #2 looks pretty good, but #3 is LEAN.

"Baffle fell off"??? Yes, that will impact things, as the jetting needs will change drastically.
 
Yeah, it was held on by a bolt and the entire baffle fell off while riding three nights ago. The issue was prevalent before then also, though. There was never the tube inside, it was just..a plate on the end of the exhaust pipe. Should I look into adjusting the carbs? 100% new to that field however.

Bike has always backfired, but since I've had this high-RPM issue, seems to backfire a lot more.
 
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Jetting in the carbs will depend on the airflow through them. If you remove restrictions like the airbox and muffler baffles, your jetting requirements will change.

My suggestion (and several others, I'm sure) would be to get a proper baffle in the muffler to restore peace and (relative) quiet in the neighborhood, then tackle the jetting project.
 
Me, I've always run fuel filters in my lines and NEVER had a problem with them. I don't use the stupidly small ones that are sold for bike use, though. Anyone who's ever had to needlessly strip their carbs and clean out the little inlet filters in them because the useless petcock filter has let crap through, will curse the day they decided to run without a proper fuel filter in place.
 
Grimly said:
Anyone who's ever had to needlessly strip their carbs and clean out the little inlet filters in them because the useless petcock filter has let crap through, will curse the day they decided to run without a proper fuel filter in place.
Click to expand...

In my opinion, you have evidently let your "proper fuel filter" fail, if your petcock filter is letting crap through. THAT is your main filter. If it is letting crap through, replace IT.

The only time I have had anything get stuck in the carbs was because it was already downstream from the petcock. Yeah, I didn't flush the carbs fully and properly after a cleaning/rebuilding session, had to go in and clean out the pilot jets. Except for the couple of times that has happened, I have never had the petcock filter let me down. The only time I have seen crud on the inlet filters is when I break into a 'new' set of carbs that have never been in my garage before, so the petcock filter seems to work just fine (for me).
 
Who Dat? said:
In my opinion, you have evidently let your "proper fuel filter" fail, if your petcock filter is letting crap through. THAT is your main filter. If it is letting crap through, replace IT.

The only time I have had anything get stuck in the carbs was because it was already downstream from the petcock. Yeah, I didn't flush the carbs fully and properly after a cleaning/rebuilding session, had to go in and clean out the pilot jets. Except for the couple of times that has happened, I have never had the petcock filter let me down. The only time I have seen crud on the inlet filters is when I break into a 'new' set of carbs that have never been in my garage before, so the petcock filter seems to work just fine (for me).
Click to expand...

That petcock filter is pretty coarse, if you care to have a proper look at it. Fine muck can, and will, get through it, and will eventually accumulate in your carbs. If you're lucky it might get drawn through and burn harmlessly, or it might settle down into the carb bowl and if you're lucky again, you might have drains on them and might remember to drain them once in a while.
If you're unlucky, and it only takes the once, the filthy gas you buy all unknowingly, will dump enough crap into your little carb filters to have you sitting at the side of the road cursing your luck.
To me, it's indefensible and utterly stupid to not guard against that.
 
Alright this is very insightful. I'm researching what a "proper baffle" would be right now. Also is this an eBay buy? I mean my previous one didn't even have that hollow tube inside, just the circular metal plate with the hole in it.
The bike has always backfired, although it backfires especially a lot now. For now I'll use the bike without the fuel filter, however I'll most likely be getting a larger one to hold off carb work.
Should I look into what I need to do to jet it properly? Also if anyone is available this weekend I'd love the assistance!
 
Turns out the issue was the baffle.

Put in the baffle today, began to ride and it was the exact same.. So I thought there goes another idea.. However as I kept riding on my way home, it got incrementally better. I kept riding and sure enough it built back up to what it was initially! I guess it had to build back the back pressure? So as of right now the issue is resolved.

Thank you for all the responses!
 
As stated earlier... The #3 plug is running VERY LEAN if it's even firing at all!!! Any changes you made to the exhaust will have no slowly changing characteristics. "Back pressure" is not something that changes slowly. I'm betting that your bike has never run right since you've picked it up and things are only getting worse.

If it were my bike, I would start with a good carb cleaning and synchronization, verify all electrical connections (especially those related to your ignition and coils) and do a proper valve adjustment. Running it without doing the basic maintenance is a good way to destroy a good engine.
 
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