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View Full Version : 200s running lean after carb rebuild



ThinktwiceZ71
02-12-2009, 01:29 PM
hey guys , i just rebuilt my 200s engine , while doing it i rebuilt my carb also with a moose carb kit from dennis kirk , it had a new needle , seat , pilot jet , air srew , main jet (plus the usual washers gaskets and orings). All were the size that was in it before the rebuild. here is the thing that confuses me , before the rebuilt it was running rich , black carbon soot on the plug when checking it , but i had peace of mind knowing i would never be lean. now after rebuild and setting the carb back to factory specs i take it for a little ride last night and it rides awesome , but the plug is damn near white. I called the honda dealership and they said to lower the clip to position 4 (3rd is stock) ....i did that and i turned the air screw in a little (add a little more fuel) and the plug is a light grey now. do i need to go to a 105 main jet ? (100 is stock) along with a 35 pilot jet is what is in it.

i have a cob jobbed air box lid on it that does not seal......i know i should get it fixed but i am going to run it like this for now. also has an apftermarket fmf type pipe that doesn't leak anymore

i just don't get how i was really rich with this setup before , and now after rebuilding with the same size jets and stuff , i am way lean.

anyone ?
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ThinktwiceZ71
02-14-2009, 03:30 PM
i figured out why it was running lean.

i just got done completely redoing my engine , and it was running lean because the 4 nuts on the top of my valve cover that hold everything tight together came loose and was sucking air into the head.

plus the carb kit i got it was the wrong needle .

my old one was a N36 and the new one was a D163

now that it's all set for sure ! :Bounce