bnorth Posted March 30, 2010 I need some help guys. Just did the top and bottom end on my rm125. Got it all together tonight and I kicked and kicked and it won't start. When I pulled the plug to check for spark it was wet so it must be getting fuel, and it had spark when I checked. When I turn on the fuel petcock the vent line coming off the bottom of the carb (float bowl?) leaks a stream of fuel. What does this mean? Time to set the float height? Share this post Link to post Share on other sites
KcDavis My Ride Posted March 30, 2010 Your float is way off..... It either is stuck open or seriously needs to be adjusted. Spark plug is wet because it is flooded most likely. Share this post Link to post Share on other sites
crider400 Posted March 30, 2010 yea, the float height is off, their is a tab, tang, on the floats, you have to bend it to adjust the float height, and hold at a 45 degree angle, the seam of the floats sould line up with the top of the carb at a 45 degree angle, check manual to make sure. Clean the jets also with compressed air and water while your at it. Inspect reeds to make sure their good anyway. Share this post Link to post Share on other sites
mihylo33 Posted March 30, 2010 clean the carb and check your float hieght. You can find alot of info here : https://thumpertalk.com/forum/showthread.php?t=749204 2nd page should give you your carb specs. and in the jetting link: https://thumpertalk.com/forum/showthread.php?t=412662 It will teach you how to properly set your float hieght. Good luck Share this post Link to post Share on other sites
wannagofaster Posted March 30, 2010 My bike did the same thing but it was because the float valve and the copper seat were wore out and fuel leaked past it Share this post Link to post Share on other sites
wrencher2s Posted March 31, 2010 Just had this happen to me and it had nothing to do with nothing like that! Was running fine and not leaking and was switching gas and drained the carb and tank. Filled it back up and it leaked like crazy! Apparently the float dropped down far enough to allow the float needle to dislodge or it happend somehow. Share this post Link to post Share on other sites