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DR350S Needle Help Needed!

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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.

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Call/Email Jesse at Kientech, explain the problem in detail and have him send you the proper parts. Most likely a new needle and a new needle jet. They're not expensive.

Make sure you know your current jet sizes, air box, exhaust mods, etc: before you call/Email him. jesse@rvi.net

I seriously recommend an extended mixture screw if you don't already have one. worth every bit of $15

http://www.kientech.com/ExtendedFuelScrews.htm

image002.jpg

http://www.kientech.com/index.htm

Jesse will fix you up! :thumbsup:

*EDIT* There should be a large white spacer on TOP of the clip, under the spring. This may be the source of your problem. Part # 3 in the diagram

Image?arik=s4v92978S7HV4vH84i3c&arib=SUZ&arim=M1N5EPD3T0egjsRz4ewF_A2&aria=xMBwg1ZmlKA_Z6T9fBgC-g2&ariz=2

Look into that first and be sure to inspect the needle.

Edited by Bob Onit

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Thanks Bob Onit - installed the missing #3 spacer and the bike runs great. Still unsure if that is the correct needle but the bike runs 100 times better.:thumbsup::confused:

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Thanks Bob Onit - installed the missing #3 spacer and the bike runs great. Still unsure if that is the correct needle but the bike runs 100 times better.:thumbsup::worthy:
As far as the correct needle goes, the stock BST carbs didn't come with an adjustable needle (adjustable needles have grooves to raise and lower the position) so many people replace the stock with an adjustable. If so, that's why your part # doesn't match the fiche.

I don't know the part numbers but if it's running fine I wouldn't worry about the part# of the needle.

Does you're needle have about 5 grooves at the top?

Also,when you say "air box lid removed" do you mean it's been cut to a big square hole? Only the side cover can be removed. The top needs to be cut out. :confused:

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