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honda bros 400 jet maybe?

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at106
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Joined: 16 Jul 2011
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PostPosted: 09:13 - 18 Sep 2011    Post subject: Reply with quote

If you change the jets in 1 carb you must do exactly the same in the other.

The main jet effects running from around half to full throttle. Low speed jet effects running from idle to around half throttle.

If you fit bigger jets the engine will run richer but performance probably wont change, unless you fit a performance exhaust or performance air filter. Without doing this the engine will probably bog down when you open the throttle and you'll probably go slower.
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0ddball
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PostPosted: 09:18 - 18 Sep 2011    Post subject: Reply with quote

If it's running fine don't start messing with it.
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Slacker24seve...
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Joined: 10 May 2010
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PostPosted: 13:58 - 18 Sep 2011    Post subject: Reply with quote

hahadumball wrote:
at106 wrote:
If you change the jets in 1 carb you must do exactly the same in the other.

The main jet effects running from around half to full throttle. Low speed jet effects running from idle to around half throttle.

If you fit bigger jets the engine will run richer but performance probably wont change, unless you fit a performance exhaust or performance air filter. Without doing this the engine will probably bog down when you open the throttle and you'll probably go slower.


Ok mate, so basicly if i do jets i have to do air filter and exhaust :/


Not necessarily. Get it set up on a dyno properly or you will almost certainly make it worse. Quite why you'd like to put performance exhaust on a Bros is beyond me.
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