Rack synced. Vacuum advance tested. Mechanical advance tested.is that vacuum advance working correctly? synched the rack?
Rack synced. Vacuum advance tested. Mechanical advance tested.is that vacuum advance working correctly? synched the rack?
5GL16 needles have a severe step in them near the bottom. They're also shorter than what went in the standard. Jim's post shows the main jets are much smaller than the standard as well. For the time being, I can scrounge my junk and see if I have four X-2 needle jets with fewer miles and maybe even some 5GL16 needles.I'll also mention that a few years later, I replaced the needles as well because I noticed shiny rub marks on their sides. This made no difference in mileage so I concluded they weren't worn.
XS1100 gets as good as 30 mpg. Plugs are black. Long history. Stock airbox. Jardine 4 into 1. Stock pilot jetting. Stock main jetting. Genuine Mikuni jets. Everything is stock and clean.
The bike starts right up. Idle is good. Acceleration from stop is good. Runs like butter all through the RPM range. It's fine riding slow or fast. I should get about 40 mpg and not be looking at black, sooty plugs.
I believe I need to tamper with fuel level. For better economy, do I need to decrease or increase the fuel level in the bowls? Whatever is wrong, is wrong across all four.
Thanks for reading this XS1100 motorcycle post.
That makes it easy enough. I'll see what's in my spares. If nothing, then XJ4ever has fresh parts.Like others have pointed out, it's pretty likely your needle jets are worn.
I cleaned the air filter and made sure all air passages were clear prior to the VYR trip.Just some random ideas.
I once bought a xj750 that ran like crap. Plugs were sooty black. the PO had tied rebuilding the carbs and had pilot and main jets reversed.
Black plugs means to much fuel or to little air. Have you checked for restrictions in the air intake. Air filter, snorkel.
You could remove the air box cover and ride like that, see if plugs get browner.
Can a second notch be ground into the top of the needles, allowing them to drop lower.
As mentioned earlier, ignition timing/advance could cause sooty plugs. Valve timing could too.
I hope you noticed my position at the back for Ozark 2019. That was for you.Following you around Marty, VYR 2019' rich gas smell was an improvement over 2018's oil cloud. .
I had four slides that I used for the trip to VYR in a hurry-up swap. A checked all the needle part numbers and put them in the order shown. The washer was under the e clip, costing an additional five mpg. I also pulled 4 matching emulsion tubes. I hope to swap them onto the bike and give it a run next weekend. I should need nothing more than a dry day. Any improvement will show I'm on the right track. If it isn't the cure, I'll drop the fuel level.Well I would want to check compression, recheck timing at idle and full advance.
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Since it's so rich yet works OK at idle I'm with (5T) something is up with the needles (5T) wear is one possibility, check part #s, mis-assembly another. We did have a one guy had the order wrong. Things happen, confirm.
Is petcock vacuum fed from one intake?
Have you waded through this thread?
http://www.xs11.com/forum/archive/index.php?t-39799.html
Looks like some gotchas in the needle jet, main combos.
It also details the mikuni #s