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Message: [QUOTE="Mickmax, post: 665647, member: 44645"] 1992 KDX250 FMF FATTY AIR BOX MOD. Only owned bike for 2 months. Bike was performing excellent except for eratic idle and oiling up new spark plugs after approx 50kms. Dismantled carby and found float level too high around 13mm and needle on top clip. Running 150 main 35 pilot standard needle R1368H and slide 5. Reset float to 16mm as per manual and refitted. Now bike will not rev out in power band. Quarter to half throttle is better. Have cleaned air filter and tried needle in all positions. Fuel is 33:1. Bike starts first kick hot or cold. Cannot do plug chop test as bike won't rev out, it sort of misses at W.O.T. Any ideas on which way to go would be great. Note: No oil in left hand engine cover. [/QUOTE]