Hey Mikuni guys
Cruiser
Joined: Feb 2014
Posts: 129
Likes: 11
From: NPR, FL
Yes. Check the float valve. May just have a little crud in it.
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
Likes: 5,448
From: la la land jerzey
most times yes // nothing falls out that you should be concerned about - you can drain it from the bottom nut first -
setting the float will require you to remove the carb and having a Mikuni book will also help -- jz
setting the float will require you to remove the carb and having a Mikuni book will also help -- jz
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,324
Likes: 3,869
From: Upstate New York
The gasket is a formed o-ring and is reusable indefinitely. Rebuild kits are available online. The tuning manual is available as a PDF download from the Mikuni website.
I suspect there is nothing wrong with your carb except for a little dirt caught in the float needle. this happens to mine from time to time. It usually cleans itself out. If that doesn't do it, the rebuild kit contains a new needle and a seat.
Do you shut off the petcock when you park the bike? Leaving the petcock "on" means the only thing holding back the fuel in the tank is the float needle.
I suspect there is nothing wrong with your carb except for a little dirt caught in the float needle. this happens to mine from time to time. It usually cleans itself out. If that doesn't do it, the rebuild kit contains a new needle and a seat.
Do you shut off the petcock when you park the bike? Leaving the petcock "on" means the only thing holding back the fuel in the tank is the float needle.
Last edited by Uncle G.; Apr 23, 2014 at 07:58 PM.
Thread Starter
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Tourer
Joined: Jul 2012
Posts: 269
Likes: 0
From: Fairbanks
I just started turning the petcock off when i park. I hope i remember to turn it back on. Probably run bowl dry before warmed up so wont be a big deal.
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Cruiser
Joined: Feb 2013
Posts: 149
Likes: 0
From: Indiana
"I hope i remember to turn it back on."
You will remember when the bike starts sputtering as your going down the road.
Don't ask me how I know.
You will remember when the bike starts sputtering as your going down the road.
Don't ask me how I know.
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Novice
Joined: Jan 2014
Posts: 16
Likes: 0
From: Dunbarton, NH
Check float level...
I have had the Mikuni/SE carb for close to 15 years, and it has never dripped.
This spring when I fueled it up for the first time it was dumping gas out the tube, obviously because the valve was having an issue.
When I took it apart to clean I was surprised to see how far off the float was from what it was supposed to be. It was set high and was barely able to close the valve off.
Adjusted according to spec. and all is well.
Screws were a little hard to get out, but I put a little anti-seize on them when I put it back together.
Next winter I will replace gaskets etc, but for now it is working perfect.
This spring when I fueled it up for the first time it was dumping gas out the tube, obviously because the valve was having an issue.
When I took it apart to clean I was surprised to see how far off the float was from what it was supposed to be. It was set high and was barely able to close the valve off.
Adjusted according to spec. and all is well.
Screws were a little hard to get out, but I put a little anti-seize on them when I put it back together.
Next winter I will replace gaskets etc, but for now it is working perfect.