Question about Honda VT 750 DC Shadow Spirit Motorcycles

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Bike been sitting for a while will start and run with choke out but when warm has no power and will cut out when given some throttle.

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You don't say what bike you have, but normally the problem is a gummed up carburetor(s). Clean the fuel system and you should be good.

Posted on Jul 31, 2010

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Starts but takes a very long time to warm up. continually stalls when throttle applied. have to keep feathering throttle to keep running . spits ,sputters , backfires until fully warmed up


ColdI engines require a richer mixture to operate smoothly...so they have an enricher (aka choke).
If you are finding you need to keep the choke on longer.....you may have a lean mixture than normal.nother
Start by inspecting the carb and intake manifolds for any leaks (loose fittings....cracked hoses) that could be drawing in air, leaning the mixture.

Another common issue with bikes that have sat over winter...is plugged idle jets.....the fuel varnishes the tiny orifices in the carb. You could try a product like Seafoam in the fuel tank....run it abit to get the treated fuel in the carbs then let it sit overnight...allowing time for the chemical to work. Since the bike runs fine warm...this may clear things up for you.

Apr 05, 2011 | 2000 Yamaha V Star 1100 Classic

1 Answer

I've recently had a problem with getting my bike started, i have managed to get it to start now, but it can only be started with the choke fully open and if i try to close the choke it cuts out. (Even when...


It is most likely fouled spark plugs. You can take them out and sand blast them, or buy new ones.
I had a CBR 954, and noticed that the spark plugs fouled out pretty easily because it runs so rich at startup (and I would shut it down during the 'warm up' phase).
Here is some more information for you:
From http://answers.yahoo.com/question/index?qid=20080806081249AALKibM
What are signs or symptoms that spark plugs in a motorcycle need to be changed?
There are several things that could hint at bad plugs.

- Hard starting.
- Slight to severe hesitation when you give the bike some throttle.
- Stalling, especially when you give the throttle a good twist
- uneven idling (tends to zoom up, or down, or sputters)
- After running the bike for a little bit, take out one of the plugs. If the end of the plug is wet, its not firing, and it could be oil fouling the plug
- take a look at the color of the end of the plug -- if it is white, its running too hot, and it can cause misfires
- look at the same area, and if it is covered in black soot, it can be poor gas mixture and dirt in your tank causing it to foul
Hope this helps.

Mar 13, 2011 | CCM RC 30 Motorcycles

1 Answer

I have a 1991 honda cbr 600, she'll start fine with the choke fully on. As she warms I let the choke off slightly and keep her at about 1,500rpm. Then she'll start steadily cutting out. It doesn't matter...


You didn't say whether the bike has been sitting (without being run) for any amount of time. If it has, I'd say that either your pilot jets are plugged, or you float needle is blocked/restricted; thus not allowing it to refill the carb bowls as fast as the fuel is being drawn from them by the engine. The later though usually only effects 1 maybe 2 carbs. Not usually all 4. the plugged pilots jets are more likely.
So how long has the bike sat without running? (And "It was running before I parked it" doesn't apply here) :-)
Good luck

Mar 11, 2011 | Honda CBR 600 F(1)H Motorcycles

1 Answer

I have a 2003 ttr225 I can get the bike to start with the choke on ihave to let it warm up for an extremly long time before I can push in the choke . once the bike is warm and I hit the throttle hard ,...


Sounds like the idle circuit in the carb is restricted. The engine is running on the choke only. When the engine reaches a certain temp the fuelthat does get is more readily burned allowing you to back off the choke. The choke probsbly can't be completely opened? right? Fuel quality is also something to consider Oil content in fuel affects combustion temps and volatility. _good luck_Ned_



Nov 16, 2010 | 2003 Yamaha TT-R 225

1 Answer

My cbr 600 f2 1993 had been sitting for a long time


Sounds like the carbs were not properly cleaned or set up. Choke should cause the cold start rpms to be higher than what you are experiencing. Application of choke to a warmed up engine will usually cause the engine to stall.

Jun 28, 2010 | 1994 Honda CBR 600 F(2)R

1 Answer

Bike wont kick start or idle , it will coast


first drain the carby, then set your air mixture screw 2 turns out, from the fully turned in position. The starting proceedure is as follows, when the engine is COLD, turn on fuel, pull on the choke fully, and kick the engine over. DO NOT use any throttle, when the engine is cold, and the choke is on. Remember Choke on, NO throttle.
When warm, no choke, and a little throttle when kicking.

May 12, 2010 | 2003 kawasaki KX 125

1 Answer

Keihin CVK-D36 carbs on a 20 yr old ZZR 600 motorcycle. Bike starts fine on choke and idles ok when warm. The engine revs up fine on the choke. As soon as the throttle is twisted the engine stalls. The...


It sounds like your bike has been sitting in storage for an extended period of time (a year or more) - and the carburetors are plugged up. If this is the case, they will need to be completely disassembled and cleaned out.
If it hasn't been sitting (and the carbs aren't plugged up) then check that all of the normal tune-up items have been performed, especially valve adjustment, oil and filters, spark plugs, etc. If this fails to produce positive results, perform a compression check on the engine. Each cylinder must be able to produce at least 140 psi of compression in order to run and idle properly.

Nov 07, 2009 | 1990 kawasaki ZZR 600

1 Answer

1984 aspencade starts w/choke and revs up, runs smooth. Take off


My 'wing won't run unless it has been warmed up some. I would suggest that you r&r your carbs to make sure the jets in the bottom are working correctly. They tend to get plugged up, especially after sitting & the aluminum flaking off inside... Rick

Apr 05, 2009 | 1982 Honda GL 1100 Aspencade Gold Wing

2 Answers

Engine cutting out with the choke off


Adjust your idle screw on your carb so that it gets more gas just sitting there at idle. Tighten the screw one and a quarter turn and then start the bike. Adjust the idle to where you think it sounds normal. If that doesnt work check your float in your float bowl, it might be stuck in the down position. Clean with some carb cleaner spray and make sure it moves freely before putting the float bowl back on, youll have to choke it or prime the carb again to get it started. All the choke does is let in more gas and oxegen so you might want to check how far the carbs close when you push the choke back in. Is it impeading any normal carb setting. Check that too. Good luck.

Dec 01, 2008 | 2004 Yamaha YZ 450 F

1 Answer

Wont start without choke


I am having a similiar problem. bmw r 1100 s will only start with full choke and will die if I cut off choke or give it any throttle. This is my first bike and it has been sitting in a garage for 2 years. I took out the carbs, cleaned them and rebuilt them. I didn't find any residual in the carbs and they were very clean. Today, I was able to get the bike running and took it down the neighborhood but after the bike warms up it idles at 6K! Man... If I can't find any answers from this forum, I will probably drop it off at the motorcycle shop just down the hill from me. Any suggestions anyone? I think I will try to drain the fuel and give it new gas. But still....

Nov 20, 2008 | 2003 BMW R 1100 S Boxercup Prep

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