[Chris Garrett]

Sometimes when I forget to shut off the fuel petcock, I get gas leaking from the left side overflow tube. I thought I read somewhere that it was common in 450's. I suppose because the bike is leaning that way on the kickstand, it accumulates in the left side bowl and overflows. Is this a normal?

 

[Bird76Mojo]

I personally have never read that anywhere. I'd double-check the float needle valve condition and float hight on that side just for safety sake. If everything's adjusted properly it shouldn't be doing that. Honda wouldn't build something that way if you think about it, so there has to be a cure..

Additionally, if it's coming out of that overflow, it's probably going elsewhere.. You know where..

Anyone else got any thoughts?


GB :mrgreen:

 

[fasterspider]

I would replace the float valves if possible or just polish the seat with Brasso and Q-Tips along with making sure the float level was set properly.

 

[NorthIdahoTed]

Same thing happened to me last year. Yes, fix the float valve issue and the petcock. Also check your oil to see if the oil has been fouled with gas. Here's a couple of links to similar problems and fixes:

http://www.cdacycle.com/Cb450forumDisp.aspx?a=15629
http://www.cdacycle.com/Cb450forumDisp.aspx?a=14624
http://www.cdacycle.com/Cb450forumDisp.aspx?a=14095

 

[Chris Garrett]

The petcock is new. So you think that the float needs to be adjusted?

 

[Bird76Mojo]

Either your float height is set wrong or your float needle valves are leaking/worn. Verify your float height is set correctly and then check for leaks. You can do this with the carb off the bike with a fuel container and some hose. If it were me, I'd just buy some new float needle valves to eliminate that possibility, and have the peace of mind knowing that they're new.

GB :mrgreen:

 

[Chris Garrett]

Either your float height is set wrong or your float needle valves are leaking/worn. Verify your float height is set correctly and then check for leaks. You can do this with the carb off the bike with a fuel container and some hose. If it were me, I'd just buy some new float needle valves to eliminate that possibility, and have the peace of mind knowing that they're new.

GB :mrgreen:

Did a quick search and struck out. Can you point me in the right direction to locate the float needle valves? I'll try adjusting the float height.

 

[Bird76Mojo]

The float needle valves are just underneath the float, right by the floats hinge point. I wouldn't set the float height until you verify the condition of the float needle valves. Look for wear at the tips of the valves and if they're rubber tipped, look for deformation. I'd plan on replacing them.

I don't know the float height specs right off hand, and I can't look it up on my PC either. I'm having serious tech problems. My PC is barely limping along. I suppose if someone here will suplly you with the specs then you could verify it and rule out that possibility. I just didn't want you to go through the process and reset the float height, thinking that's all that's necessary, when it's a good possibility that the FNV's need replaced.

GB :mrgreen:

 

[KERRY]

Make a float gauge that will hold the float bottom 2cm below the edge of the carb body. set it in place and open the fuel cock. nothing should leak out of the float valve, but fuel should start to come out when you move the card a little bit away from the carb body.

 

[Chris Garrett]

LOL When I asked someone to point me in the right direction for the float needle valves, I mean't where could I buy them.

 

[fasterspider]

LOL When I asked someone to point me in the right direction for the float needle valves, I mean't where could I buy them.

Honda or Sudco.