VStar 650, stalls until warm - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
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post #1 of 13 (permalink) Old 06-20-2010, 03:02 PM Thread Starter
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VStar 650, stalls until warm


I just bought a v-star 650, 1999 with only 4,000 miles. The previous owner didn't use it much.

When I take it out for the first time in a day it wants to stall out when I first take off. I'll let it warm up for a minute or so with the choke out, but when I first go to rev the engine it will stumble and die as soon as the clutch engages. After doing this a few times, I'll get it going and then it accelerates erratically for about a mile. After that mile of warm up it runs perfectly fine.

The mechanics said he wants to tear out the carbs and clean the jets. I have 92 octane fuel and some seafoam in there now. Is there anything else I should try before bringing it in to him?

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post #2 of 13 (permalink) Old 06-20-2010, 05:32 PM
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Stop running 92 octane gas. Your bike doesn't have high enough compression to require it. So you're just wasting your money. Stay with a "Top-Tier" gas marketer. Search Top-Tier for a list. Sea-Foam works wonders. I'd run two tanks before I'd let someone tear into it.

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post #3 of 13 (permalink) Old 06-20-2010, 06:16 PM
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Ya might wanna leave that choke on for a bit longer too,
till it's good and warmed up.

Now 2010 V STAR 950 T
Former bikes were
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1977 Harley Iron Head Sportster
1970 Triumph 500 Hard Tail Chopper
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post #4 of 13 (permalink) Old 06-20-2010, 09:48 PM
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I had a Suzuki LS 650 like that once.
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post #5 of 13 (permalink) Old 06-21-2010, 06:43 AM
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I had this exact same problem earlier in the year. I found it was the old tank of gas. I ran her until it was close to empty - put in a fresh tank and it's been golden ever since.
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post #6 of 13 (permalink) Old 06-22-2010, 02:32 PM
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Get it to a good Yamaha dealer mechanic and have them completely rebuild the carbs. Keep in mind, with only 4000 miles since 1999 that machine has done a lot of sitting time which simply means those carbs are not clean at all. Riding it and stumbling around for the next several hundred miles is not going to magically clear up what's wrong in its entirety. Especially over the past few years the newer fuel formulas are dryer than ever and after the machine sits for only a matter of months will dry up in the float bowls and fuel/air circuits. The only way to correct this is to disassemble and clean accordingly. Additionally, once they are clean and the bike runs well, make it a point to ride it or run the engine for a few minutes MONTHLY. This simple point will prevent this from happening again. I hope this advice steers you well. Let me know how it turns out.
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post #7 of 13 (permalink) Old 06-22-2010, 08:59 PM
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Carb cleaner

In all probability Cheese and crackers is right. But, I would still try the Sea Foam for a tank or two before I spend the money.

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post #8 of 13 (permalink) Old 06-22-2010, 11:28 PM
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First thing I'd do is run about 1/2 a can of seafoam through it with some brand new gas.
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post #9 of 13 (permalink) Old 06-06-2011, 10:27 AM
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I had the exact same problem. I used seafoam and it seems to have improved my warm up performance, but only by a little. the first cold start of the day is always just a practice in patience for me.
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post #10 of 13 (permalink) Old 06-06-2011, 12:05 PM
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Carb issues are a royal pain. I am still in the guessing stages with my carbs. I ran sea foam through mine but have still been having issues from time to time. I would still follow the advise given by the majority, start with the SeaFoam because if it does fix the issue you'll have saved yourself a pretty penny.

"By failing to prepare, you are preparing to fail." -- Benjamin Franklin
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