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New exhaust and 3x3 mod jetting.

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So I put a FMF power bomb header and power core tip then I did the 3x3 air box mod. I went for a ride and it seemed like I went through my gears really fast and didn't get much speed. I'm thinking I need to rejet the carb. Any suggestions?

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Yeah, if you put a full exhaust on and opened up the air box you definitely need to re-jet.

 

I recommend the JD jet kit and TT Extended fuel screw.

 

https://www.thumpertalk.com/shop/JD-Jetting-Jet-Kit-DR-Z400S-SM-p2006766373.html

https://www.thumpertalk.com/shop/ThumperTalk-DRZ400S-SM-Extended-Fuel-Mixture-Screw-p2006766350.html

 

Keep in mind this is for an S or SM with the stock CV carb. If you have an E model with the FCR you will need different parts than I linked to.

Edited by Wisconsinite762

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The bikes come lean from the factory. What you did by doing the 3x3 mod and adding exhaust if make it even worse. 3x3mod and jet kit go hand and hand. Id suggest a jd jet kit for your specific carb.

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Well I bought a FMF jet kit and it came with pilot jets the biggest one is a 144. What comes in the JD kit?

And yes I have the E model.

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