I bought a used 50 with an 82 cc bbr big bore kit in it. When i got it it ran fine, but now it breaks up at low rpm under a load. The plug also immediatly gets full of carbon. anyone have any ideas on what is causing this???

 

did it start doing it in hot weather or did it run jsut fin in the heat before? sounds like it's running alittle rich, but i'd need to knwo more about the symptoms... does it do it cold or hot or both... what is the difference in the temp outside from when it ran good till now?

get me some more info and hopefully i can help

 

the temp is maybe 10 degrees warmer. it gets worse as the engine warms up. I think it might need a smaller pilot jet because adjusting the air/fuel screw does not make a difference. do you know what size the stock pilot jet should be? I am gonna pull it appart tomorrow and adjust the valves, and see what is in it for jets. thanks for the reply

 

just try and drop the needle one notch and see how that works... like glenn said it sounds like your getting to much fuel..

 

i just got a 05 fiddy with the same kit bbr 82cc and exhaust, awesome power in 2nd. but top speed is so low. my other 05 all stock blows it away on top speed. and the one with the kid is like tryin to hard. i dnuno i dont' think im gettin all the power outta of it i should and i have no idea where to start, and on top of that. it blows alot of white smoke ne suggestions?! please helpppp!

 

white smoke, burning oil, rings are bad... try trailbikes.. don't know the website off hand...

 

www.hondatrailbikes.com

 

check the ground. my 04 did that.

 

 

ooopz lol wrong section...