@Calum what carb did you upgrade to mate?
Posts made by runes
DTR will only start with easy start
Hi. I've recently bought a DTR 125 2002. When i bought i off the lad it started first kick, had a quick spin an it seemed sound. The exhaust was a bit smokey but that didn't really bother me. Started first kick an ran fine. The lad i bought it off said if it's left a few days without being used the plug gets wet an it's hard to start so wipe the plug and it will start.
Got it home, next day wouldn't start. Wiped plug, wouldn't start. Put a new plug in, same problem. I went to adjust the air/fuel mixer screw but it's stripped an seized. Tried easy start, starts no problem after a few kicks. Then i can turn the engine off and it starts no problem with half a kick. After being left for half an hour or so it won't start, back to square one.
I took the carb to a carb man and he said the float was set too high, put a new float needle and seat valve in and adjusted it. He didn't want to attempt extracting the mixer screw.
Got home put carb on and same problem, no better.
I took the carb to an engineering motorbike garage to extract the screw but he wants another screw in his hand so he knows what size bit to use and can't guarantee he won't wreck the carb trying extraction regardless. I already knew this was a possibility. Problem is I'm not certain what carb it is and whether or not I'm best just replacing the carb or even if it's something else causing the problem. It's a flat mikuni with a 240 main jet in.
Any advice is greatly appreciated, thanks.