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Carby advise
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Share your modifications both the ones that worked and ones not worth doing.
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TOPIC: Carby advise

Carby advise 6 years, 10 months ago #4038

  • Gotowo
  • Fresh Boarder
  • Posts: 7
Gday all
Got a 2008 model drz400E believe it has a keihin FCR 39 carby which is original from new.  I have removed the snorkel from the air box and the exhaust is standard. Not sure what the dealer did to derestrict it when I purchased it new.
Due to the fact that the air box has the snorkel removed I thought I should re jet the carby to suit. 
From what I've read on the internet (and I dont believe everything i read on the internet) this is my plan and any comments, suggestions would be appreciated.

1. Remove the coast enricher and plug any openings due to its removal

2. Put in a 160 main jet (165 is standard I think)

3. Put in a 70 idle air jet

4. Buy a "T handle mixture screw" for easy adjustments

5. Connect to a CO2 meter  and set the mixture screw.

thanks in advance.

Re: Carby advise 6 years, 10 months ago #4040

  • xrman
  • Gold Boarder
  • Posts: 182
I would run it standard for a while and see if it pulls hard through the rev range.

Many E modsl assem to run just fine as is.

An extension fuel screw makes sense.

Try a B&B baffle in the muffler for just a bit more HP for not too much investment.

Check the sidetrack articles on the homepage on how to setup your bike. KISS principle rules.
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