2003 Vstar 1100 problems - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
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post #1 of 12 (permalink) Old 02-03-2016, 01:02 AM Thread Starter
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2003 Vstar 1100 problems

Hello all, this may have been discussed before but I'm new to the site and can't find the information I need. So I'll make a long story short. I bought this bike and it doesn't run. Ive checked all the important stuff like spark and fuel. I'm getting spark to both cylinders. And I've got the fuel system cleaned out, including the carbs. When I go to start it the bike will turn over just fine but it spits and sputters and will not start. Sometimes I get a backfire or a pop here and there but no start. Any help or thoughts would be very much appreciated.
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post #2 of 12 (permalink) Old 02-03-2016, 06:16 AM
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Sounds like the carbs might not be doing their job just right. Go to the link in my signature block; the info that you'll find there will surely point you in the right direction. Let us know what you find.
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post #3 of 12 (permalink) Old 02-03-2016, 07:01 AM
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Is this your first vstar? are you using the throttle to start? You have to have all three
fire,compression and fuel. Have you tried stater fuel in the intake? Most all like this is the fuel system.
You can get a free manual pdf. on the web.
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post #4 of 12 (permalink) Old 02-03-2016, 08:02 AM
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When I first got mine, I had messed around with the idle screw a bit. Might not be in your case...but when I had it set super low it did the same thing yours describes. spit/sputter(was waaay too low). Tried turning idle up a bit as a test? Did you bench sync carbs when you had them off? Might not be it but just a thought.
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post #5 of 12 (permalink) Old 02-03-2016, 08:55 AM
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Quote:
Originally Posted by Dralen View Post
I'm getting spark to both cylinders. And I've got the fuel system cleaned out, including the carbs. When I go to start it the bike will turn over just fine but it spits and sputters and will not start. Sometimes I get a backfire or a pop here and there but no start. Any help or thoughts would be very much appreciated.
By "cleaning" the fuel system....do you mean disassembly of the carbs, running a bread tie wire through all the side holes in the pilot jets and main holes in both pilots and mains?

Pilot mixture screws (PMS) should also be set at about 2 3/4 turns out.....

...and as mentioned above...no throttle on start.
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post #6 of 12 (permalink) Old 02-03-2016, 11:44 AM Thread Starter
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When I say I cleaned the fuel system I literally had to go through everything, tank, lines, filter, pump. This bike had set up a long time before I bought it so the gas had gone passed shellac to white powder. Now I'm still not 100% sure I got the carburetors as clean as they need to be but I'm working on it. And thanks to this and other forums I learned about the no throttle at startup. And yes this is my first Vstar. The last bike I had was a Honda and that was 21 years ago. I'll keep y'all updated and thanks for all the suggestions.
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post #7 of 12 (permalink) Old 02-04-2016, 08:02 PM
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The last time I had white powder in the carb, it had set a long time with an ethanol fuel mixture. It had actually corroded some of the metal in the carb and I wound up replacing it. Sounds like as said above, the fuel delivery or spark. Pull the air filter to eliminate that. If all that is good, might check the timing. Good luck with this one. Cheers, Wavelength.
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post #8 of 12 (permalink) Old 02-19-2016, 05:09 PM Thread Starter
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Well after talking to y'all I double checked everything and got a little more into it. Come to find that while I do have some compression its no where near enough. So I am in the process of tearing the bike down and will take a good look at the engine. I'm thinking collapsed rings but without it broke down I'm not sure.
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post #9 of 12 (permalink) Old 02-19-2016, 06:39 PM
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Keep us updated Dralen, and glad you joined us.
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post #10 of 12 (permalink) Old 02-20-2016, 09:06 AM
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Quote:
Originally Posted by Dralen View Post
Well after talking to y'all I double checked everything and got a little more into it. Come to find that while I do have some compression its no where near enough. So I am in the process of tearing the bike down and will take a good look at the engine. I'm thinking collapsed rings but without it broke down I'm not sure.
Low compression is very rare on these bikes....I'm wondering if you did the compression test correctly? Like making sure the throttle is fully open when testing?
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