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WaPaWeKkA

05 Honda 450r

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Extremely difficult to start when it is warmed up. Bike will idle but as soon as you go to press the throttle, it stalls. Occasional stalling while going downhill. Smells of fuel when sitting whether gas is on or off. Just a carb rebuild or possibly something else? 

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Start with carb. Valve adjustment would be next. 

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Rebuild the carb. Valves would probably make it hard to cold start not hot start.

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3 hours ago, jtmoney714 said:

Start with carb. Valve adjustment would be next. 

This. 

Does the bike drip fuel? If so you are looking at overflow seat/plunger. Stalling off the bottom will be gunked up main/pilot. Make sure you air/fuel screw is appropriately set for  altitude. The valves are very easy to check/adjust  if you have the tank off i suggest doing it just because your 70% of the way there. I always prefer to pull the tank and drain/flush it to remove any FOD

 

3 hours ago, spize909 said:

Rebuild the carb. Valves would probably make it hard to cold start not hot start.

My experience with honda’s is the bike is harder to start when warm when the valve go out of adjustment. Little to no effect when cold. Damn near impossible to kick start warm

Edited by sausage450r

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the stalling after blipping the throttle sounds like a plugged accelerator pump squirter....hard start....valves or carb....likely carb due to the AC problem... Probably needs a float needle and seat.

 

Sudco....sells those parts...

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Thanks guys. The bike does not drip any fuel. I will get a carb rebuild kit and go from there. Switching over to an electric start bike may be in my future. 

Andrew

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On 2/10/2019 at 11:20 AM, realbadlarry said:

expfcrmx.gif

But carbs are so simple! :bigrin 

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17 minutes ago, Rockwood said:

But carbs are so simple! :bigrin 

I'm pretty sure that is the wrong schematic. The '05 did not have the FCR in it......unless I am mistaken.....but that is pretty rare.

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12 hours ago, spize909 said:

I'm pretty sure that is the wrong schematic. The '05 did not have the FCR in it......unless I am mistaken.....but that is pretty rare.

It did not, 06 was the first year with the FCR.

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Check to see if you quad can get the hot start kit. 

 

My yfz450 is 2004 and has it. 

 

Also so if your jetting is lean and you let it set for five minutes the head will heat soak making restart difficult. Maybe let the fan cycle off before shutting it down? Bigger main jet. Also most of these bikes area lean from factory on the APump. Do you have a bog down low? 

I know there are a list of carberator mods mine needed 

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Needs a valvejob.  Lash goes away when it's hot is why it won't start. The 04/05 intakes are butter soft. 

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Happened on my 06.  Had Morgan upgrade the valves.  All better.

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On 2/10/2019 at 11:19 AM, sausage450r said:

This. 

Does the bike drip fuel? If so you are looking at overflow seat/plunger. Stalling off the bottom will be gunked up main/pilot. Make sure you air/fuel screw is appropriately set for  altitude. The valves are very easy to check/adjust  if you have the tank off i suggest doing it just because your 70% of the way there. I always prefer to pull the tank and drain/flush it to remove any FOD

 

My experience with honda’s is the bike is harder to start when warm when the valve go out of adjustment. Little to no effect when cold. Damn near impossible to kick start warm

THIS!

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On 2/10/2019 at 1:13 PM, WaPaWeKkA said:

Thanks guys. The bike does not drip any fuel. I will get a carb rebuild kit and go from there. Switching over to an electric start bike may be in my future. 

Andrew

I had an 05 and got lazy and wanted electric start. Sold 05 after buying an 06. The 06 never ran as good as the 05.

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