I have an 06 v star 1100 and it was sitting for a little while. I could only get it to run choked. I put a fuel treatment in and it still wouldn't run, so I pulled the carbs and cleaned them. Everything looked fairly clean except there was some buildup on the needle. I put everything back together and now it will run off of choke, but only with my hand on the throttle. Then the front cylinder carb chugs and spits fuel. Also, there is a good amount of smoke from the tail pipes. Still a carb issue,or should I just try some new gas?
Thanks,
Steve
new gas and new plugs just might do it.....when you get it started run around for 5 or 10 miles and blow all the crap out....you might have to adjust the idle.....bob
souds like pluged piolt jets to me.
Well, today I drained the remaining fuel from the bike and put new fuel in. It will run now with no extra throttle. The problem I'm having now is the front cylinder chugging. I am going to check the sync and see how it looks. I cleaned all the jets when I cleaned the carbs.
Thanks for the input, Let me know if anyone thinks of anything else. For some reason the front carb seems to be running richer than the rear. I only have popping from the front.
I am by no means and expert on the topic, so I should just shut up. However, I just went through something similar on a motorcycle I bought for my wife. If your front cylinder is "popping", my thoughts would be that it is running too lean at idle (or slow speeds) and that points back to a clogged pilot jet. This is particularly likely if the engine wakes up and runs fine once you start twisting. Fresh fuel is a must, too, and new plugs wouldn't hurt but, if the ones in there look OK, they are probably not a significant factor right now.
The orifices in pilot jets are so tiny, that even a minuscule particle of dirt can clog it, and it is very difficult to tell that it is clogged using only your eyes. If you go to your dealer, they should be able to sell you some new pilot jets - it would be well worth the cost. Barring that, you can have your pilots cleaned with a jet file - some motorcycle shops have them.
If your front cylinder really IS running rich, then I would check for a sticking float, a sinking float a sticking slide or a clogged air jet. I am not sure how many air jets are on these carbs, but they can become clogged as well.
I talked to a mechanic recently who told me that, on older carbs that may be contaminated with rotten fuel (and the particulate matter it seems to carry with it), it is best to just remove and replace ALL the jets (air jets and fuel jets) with new.
thanks for the response. I am just going to pull that carb apart again, clean it, and a friend recommended using a piece of wire to verify it's clean. I'll post back once I get it running properly.
well, I finally got a chance to pull the carbs again. When I pulled the main jet from the troublesome carb, the o-ring sealing it to the solenoid was shot. Would that cause my severe backfire? I know I will probably end up doing the grind method when I eventually rejet, but for now, do you think this is a serious issue? If I don't hear back, I'll probably just put the carb back together, see if it works, and if not, I'll go from there. The second time pulling them was a lot easier than the first. From complete bike to carbs out and torn down was 20 mins.
When you say "shot" do you mean "disintegrated"? If so, I would wonder where the pieces went. If a piece of the o-ring got lodged in the jet, that very well could be the cause of your problem.
true, I didn't really think about that, but I got the bike back together, and it doesn't backfire nearly as much. Now it only backfires on steady throttle and on decel. I only put enough of the bike back together to be able to pull it apart in a couple of mins, so it shouldn't be too big of a deal to get new o-rings and put it back together.
Also, I did the lazy mans way of disabling the AIS and I don't know if maybe something in that is clogged and giving me problems as I recently put it back together.
Make sure your AIS is disabled and not leaking air into the exhaust system. Remember that the AIS is vacuum-powered from the FRONT cylinder. Be certain that the vacuum hose coming from the front cylinder is fully plugged, and that no air is leaking. If it is, then it could be the whole problem.
Also, remember that carburetors are complex because they have so many tiny passages in them, through which air and liquids must flow freely. You may still have a clog somewhere in the front carb. Try pulling the PM screw out completely, and make sure that the spring, o-ring and flat washer are intact and in place. While the screw is out, try spraying some carb cleaner through the hole at the bottom of the PM screw seat (use the straw that came with the carb cleaner). There may be some dirt still in that carb circuit.
In your original post, you mentioned that thr front carb was "spitting fuel". Have you looked at the plug to see if it is wet or carbon-fouled? If the front cylinder is running real rich, it could be a indication that your float is sticking or sinking, or that the main needle or slide is sticking. Except for the case of a SINKING float, you may need to really clean that carb well again. You might even have to chem-dip to get all the crap out of there.
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