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Kymanic
50cc nipper
Joined: 10 Nov 2007
Posts: 47
Location: North Brisbane
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 Posted: Mon Jan 07, 2008 6:48 pm Post subject: 660 Raptor jetting |
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| Would someone be kind enough to tell me what size the pilot and main jets were when a 2004 yamaha 660 raptor left the factory please ? |
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Sponsor
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bigjon
Moderator
Joined: 17 Feb 2006
Posts: 1279
Location: Dubbo
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| Posted: Mon Jan 07, 2008 11:34 pm Post subject: |
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Main 140/145
Pilot 22.5
_________________
Don't close your eyes during the crash, you'll miss the best part |
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Kymanic
50cc nipper
Joined: 10 Nov 2007
Posts: 47
Location: North Brisbane
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| Posted: Tue Jan 08, 2008 4:38 pm Post subject: |
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Thanks bigjon.
Not sure how its been jetted by previous owner. I bought it with no airbox lid and the baffle removed from the stock exhaust, Hopefully this will return the bottom end power that I've lost since putting the airbox lid back on (with the fitting a K&N filter) and fitting a stock muffler.
Now that I know what the stock jetting is, I will work from there.
Look out creek crossings and hill climbs.......... LOL. |
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bigjon
Moderator
Joined: 17 Feb 2006
Posts: 1279
Location: Dubbo
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| Posted: Tue Jan 08, 2008 5:18 pm Post subject: |
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If the jetting is stock a good place to start would be to bump your main to 145/150 and back the fuel screw out a bit. If your backing it out too far you may need to use a larger pilot.
_________________
Don't close your eyes during the crash, you'll miss the best part |
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