I am having some issues with my 92 DR350S (street legal model) with the CV carb. The bike will start ok (cold with no choke). It runs very rich, black smoke from the exhaust. The weirdest part is that occasionally the needle will pop out of the main jet holder. #13 in the link http://www.mrcycles.com/fiche_section_detail.asp?section=84072&category=Motorcycles&make=SUZUKI&year=1990&fveh=1910 My needle has 5CD18 on it with the white spacer under the clip. Does this sound right? According to the above link it is the wrong needle. Do I even have the right parts fiche? The bike also has a free flowing Cobra exhaust, air box lid removed and I am at 2400 feet asl. 137.5 main and 37.5 pilot.