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1995 DR350SE carb specs needed

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Does anybody know the factory sizes of the main jet and pilot jet on the stock carb and also the needle position?

I believe the carb is a Mikuni BST33SS. Thanks folks!

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pilot: 37.5

main: 127.5

needle: non-adjustable, one position only

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Thanx jc.

My clymer 1990-1994 repair manual is showing (page226) a 135 main jet on the DR350S. That sounded too big for my bike. But a 127.5 main jet is more in line what I was thinkin. I didn't know the needle was fixed though.

I'm lookin at a FMF powercore4 slip on (with quiet core insert) for my bike. I was just on the phone with FMF and they said jetting was not needed. He said maybe a turn of the fuel screw but that's it.

The jetting center of the FMF site shows these settings for my bike.........

Main Jet: 127.5

Pilot Jet: 37.5

Needle: STOCK

Needle Position: 3RD

Power Jet: N/A

Air Screw: N/A

Fuel Screw: STOCK

Comments: Remove airbox lid snorkel

I'm afraid it will be too lean esp without the snorkel but I think I'm just gonna try that slip on and see what happens. If I buy it, I'll report here with the outcome. I'm sure I'm not the only one going through this.

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Main jet should be around a 135 if you have an open airbox and aftermarket exhaust. The pilot jet should be fine, just tweak the idle mixture screw for best, smooth idle. 1.5 - 2 turns out from lightly seated position works best for most bikes.

Clymer may be quoting the "Dirt" model when talking about the adjustable needle.

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By the way, my airbox isn't opened up. I don't mind removing the snorkle if I have to but I'm trying to avoid cutting into my air box. I want to be able to go back to stock should I not like this powercore. I was hoping to just slip on the new one to see how I like it. I know it will run a tad leaner but I was hoping the fuel screw would fix that.

I figured I'd post this here as a good source of info for others too.

Hope the pic comes out ok...

This is for 1990-1994 bikes!

I don't know if these specs are the same for later years though.

carbspecs.jpg

Edited by 10pyro10

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