05 Honda 450r

[WaPaWeKkA 163]

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? 

[jtmoney714 184]

Start with carb. Valve adjustment would be next. 

[spize909 489]

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

[sausage450r 881]

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 February 10 by sausage450r

[realbadlarry 247]

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...

[realbadlarry 247]

[WaPaWeKkA 163]

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

[Rockwood 874]

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

But carbs are so simple!  

[spize909 489]

17 minutes ago, Rockwood said:

But carbs are so simple!  

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.

[HozayKwarvo 237]

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.

[Sand tourS 81]

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 

[Morgan 52]

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

[Kraut_n_Rice 254]

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

[Orange_R 118]

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!

[Ifly 4]

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.