300ex backfires

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Sep 23, 2003 | 04:43 PM

ROOTYTOOTIE

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Weekend Warrior

Joined: Sep 2003

Posts: 16

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300ex backfires

On my 300ex i have a Big Gun exhaust with whitebrothers headpipe and jet kit with vents in my airbox. I was wondering why it backfires at high reving.[img]i/expressions/face-icon-small-confused.gif[/img]

Sep 23, 2003 | 05:53 PM

JoshCVBz

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Joined: Oct 2000

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300ex backfires

Sounds like you are probably running lean. did you rejet?

Sep 23, 2003 | 06:52 PM

RacinJason

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300ex backfires

You need a moe bigga main jet

Sep 23, 2003 | 06:56 PM

ROOTYTOOTIE

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Weekend Warrior

Joined: Sep 2003

Posts: 16

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300ex backfires

thanks for the in formation. i have a 128 main jet, what should i put.

Sep 24, 2003 | 12:19 AM

RideRed420

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Joined: Sep 2002

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300ex backfires

about 130, 133, 135.....imo

Sep 25, 2003 | 03:45 PM

ROOTYTOOTIE

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Weekend Warrior

Joined: Sep 2003

Posts: 16

Likes: 0

300ex backfires

thanks, i will try out those

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