Mine just started doing this yesterday. Wasn't a problem until I installed aftermarket parts, but I only had 300mi on it at that point so it may not mean anything.

Fuel shoots out the top atmosphere vent hose when starting the bike after sitting for awhile (hot). At first I thought it was coming out the breather, but then realize the vent hose was aimed at the back of the breather. What a mess this makes, not to mention making me feel like I need to run for the nearest fire extinguisher! I'm pulling the carb off today to check the float/needle and lower the float level slightly for good measure. Since I live in Central Florida I'm disconnecting the carb heater too.

Have yet to install the ported manifold I received before Christmas and remove the AIS, so hopefully once I get the carb fully dialed in this won't be a regular occurance?

If this is a percolation problem, why doesn't it do it when the bike is sitting? Seems that starting it causes this so wouldn't that be the added pressure from the fuel pump + a float level/needle problem instead? Why doesn't it come out the float bowl overflow instead of the atmosphere vent? Is there a float bowl overflow?<br><br>Post edited by: sjh55, at: 2007/01/07 08:04