It's getting cold...

MitchP · Nov 14, 2012

As winter comes near I am reminded by others about what a choice time i chose to sell my car. Anyways, my motor does not like the cold. In the morning it stays about 40-50F. At night my motor quits, and it won't start too easily in the morning.

So could I add fuel stabilizer? higher octane? New spark plugs? put a heating pad around the motor? Pedaling a 65lb bike is not fun...

The only thing I should note is that the cap on the exhaust was removed (too much back pressure, wouldn't start,)

It's a new Grubee GT5. NT carb. Gonna use propane gas to check for leaks.

moonerdizzle · Nov 23, 2012

hit the tickler twice, or one slightly longer push, full choke, rock it back till it hits compression, then fire it up, i can start my motor down to -20 degrees. thats as cold as it got last winter, it will usually pop off a few times with full choke, then go to half choke and it will fire right up, let it idle for a bit till its warm and then motor off. and your lucky, 40-50 is a nice day here, its 32 with a 8 degree wind chill right now.

2stroker · Nov 25, 2012

MitchP said:
As winter comes near I am reminded by others about what a choice time i chose to sell my car. Anyways, my motor does not like the cold. In the morning it stays about 40-50F. At night my motor quits, and it won't start too easily in the morning.

So could I add fuel stabilizer? higher octane? New spark plugs? put a heating pad around the motor? Pedaling a 65lb bike is not fun...

The only thing I should note is that the cap on the exhaust was removed (too much back pressure, wouldn't start,)

It's a new Grubee GT5. NT carb. Gonna use propane gas to check for leaks.

On some kits when the weather changes you gotta adjust the carb. Something about the climate change does it.

BarelyAWake · Nov 25, 2012

Colder air is denser which leans the mix & thus then need for a choke/enrichment.

While cold starts may be a pain, if the motor runs well once warmed up I'd leave it be - the change is so slight it very rarely requires a carb adjustment unless it wasn't correct in the first place

biknut · Nov 25, 2012

Now that the weather has cooled off, I have to use my choke to get the motor started. I just switched my spark plug from a NGK BP6HS to a BP5HS for the winter. After my motor warms up it runs the same as always.

Going against the wind is a little harder in the denser air.

MitchP · Nov 25, 2012

Yes Biknut... I used to ride with the choke half open... I thought it was adjustable like that. Then I realized I was dead wrong. Now I open it for the start up and work it to the closed position.

There were problems I caused... There was a visible gap between the carb and the intake. I had the choke halfway on. Plus I got a new plug, an NGK and it's keeper.

the chief · Dec 10, 2012

stop at autozone pick up a can of starting fluid, spray in carb, it will start like it was 90 out.

crassius · Dec 10, 2012

I have heard guys complain that starting fluid blew their crank seals out - don't know for sure, but I have avoided using it.

the chief · Dec 10, 2012

that is bad information, they are wrong. or you could always get a larger rear sprocket to increase your rpms at lower speed making it easier to start. starting fluid is the best though, use it all winter in chicago.

MitchP · Dec 11, 2012

Im probably going to buy a 50 tooth. Are the any sprocket adapter that take the standard 9 hole sprocket?

http://www.livefastmotors.com/products/gas-powered-bicycle-motor-clamshell-sprocket-adapter-small.html

Do we like these type or not?

crassius · Dec 11, 2012

their pics won't open in my browser, but the text says that you still need to center the sprocket by hand - why have an adapter then?

moonerdizzle · Dec 11, 2012

be careful with starter fluids, it strips the oil film off of the cylinder walls, they sell two stroke safe starter fluid. but it costs more. i never had to use starting fluid, even at 20 below zero, full choke, 2 second push on the primer button, pedal once and it will pop off, half choke pedal again and shes running.

16v4nrbrgr · Dec 11, 2012

To make it run at the right temp you could make a sheet metal object for blocking the cooling fins.

In racing we do the same thing with radiators and colored duct tape.

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It's getting cold...

MitchP

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moonerdizzle

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2stroker

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BarelyAWake

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biknut

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MitchP

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the chief

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crassius

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the chief

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MitchP

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crassius

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moonerdizzle

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16v4nrbrgr

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