My XV535 stats up right. Yet at the end of warm up , when reducing chock amount ,the engine starts to run iregular ,and stops.This has happened as I did not use my bike for four weeks. Thanks for helping

DTC P1400: Cold Start Emission Reduction Control System

Circuit/System Description
The catalytic converter must be warmed to efficiently reduce the emissions. The cold start strategy is to reduce the amount of time it takes to warm the catalytic converter. During a cold start, the engine idle speed is elevated and spark timing is retarded to allow the catalyst to warm quickly. This diagnostic monitors the following to build an exhaust energy model:
• Engine speed
• Spark advance
• Throttle position
• Engine airflow
• Engine coolant temperature
• Engine run time
• Park/Neutral position
• Vehicle speed
The actual model is then compared to the expected exhaust energy model.


Diagnostic Aids
Any loading of the engine that lowers engine RPM, such as partial application of the clutch, A/C cycling, etc. during the first 120 seconds of the engine run time may set this DTC.
Circuit/System Verification
Allow the engine to cool.
Start and idle the engine for at least 2 minutes.
DTC P1400 should run and pass.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Inspect the air intake system for the following:
• Modified, damaged, or restricted
• Dirty or deteriorating air filter element
• Crankcase ventilation system for correct operation.
• Water intrusion
• Vacuum leak and other unmetered air downstream of the MAF sensor
• Intake manifold leak
Inspect the exhaust system for the following:
• Water intrusion
• Exhaust leak
• Damaged, restricted, modified or enhanced exhaust system.
Inspect the engine mechanical for items that could alter the air flow into the combustion chamber.


Basically it's not getting enough fuel

DTC P1400: Cold Start Emission Reduction Control System
Circuit/System Description
The catalytic converter must be warmed to efficiently reduce the emissions. The cold start strategy is to reduce the amount of time it takes to warm the catalytic converter. During a cold start, the engine idle speed is elevated and spark timing is retarded to allow the catalyst to warm quickly. This diagnostic monitors the following to build an exhaust energy model:
• Engine speed
• Spark advance
• Throttle position
• Engine airflow
• Engine coolant temperature
• Engine runtime
• Park/neutral position
• Vehicle speed
The actual model is then compared to the expected exhaust energy model.

You need to run a basic fault code test and see if anything shows up in memory.

When running is the idle smooth or up and down?
Is the chock operating, or adjusted after the motor gets warm?
Is the carburetor needle adjusted after the engine idles to warm as it should be to be set correctly.
Are you blowing snow when it dies or at idle?

if cant find transfluid stick means it is a garage job when they do flush they put correct amount back in

Most likely a worn out battery,if original to car

Are you sure you have the right fuel mixture? Many of these require 2 Cycle oil to be added to the gas. If fuel is right, you may have a vacuum leak at the carb (or crack in base where it mounts to the engine). My weedwacker needed to be run on half choke for about 10 min before it got hot enough to run with choke off.

Hi,
Often times in warm weather you may only need to have it half choked or you may not even need any choke...experiment to see how much you need to get it to start and run...

heatman101

you need a new top end

First, make sure all your ignition components test out good; ignition coil, spark plugs, plug wires, power transformer, and even your alternator and battery.

Next, check your fuel system; fuel pump, fuel filter, fuel pressure regulator, and even your fuel injectors. Many times a clogged fuel filter can cause idling and hesitation problems. Also check for any restricted air passages starting from your air filter, all the way to your throttle body and EGR valve.ry checking the tps sensor (throtle positioning sensor). if the tps sensor is not working right when the engine warms up the tps sensor will not allow the fuel pump to pump as much as it needs to keep the engine running. The reason it only happens when the engine warms up is because the throttle is chocked when the engine is cold so it does not take as much gas to run it.