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xs650 > > Motorcycle Systems > > Fuel > > Setting a carb up for open exhaust


Setting a carb up for open exhaust
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krunk
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Joined: Jul 15, 2008
Posts: 75

PostPosted: July 29, 2008, 12:54 pm    Post subject: Setting a carb up for open exhaust

Is there a standard for a 650 to be set up when somone wants to run open exhaust with baffles? Does it need to be rejetted ect?

I just figured there might be a point to start at when someone wants to run open exhaust. Thanks!
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tweedy64
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Joined: Aug 17, 2007
Posts: 278
Location: wiltshire, England

PostPosted: July 29, 2008, 1:05 pm    Post subject: Re: Setting a carb up for open exhaust

You'll most certainly need to rejet. Have you still got the airbox or pods. Open exhausts do sound nice i must admit but you want to get your jetting right or you could end up doing damage to the motor. There are lots of guys on here who can help. I put bsa mufflers on mine and they sound sweet, loud but nice. cheers tweedy
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krunk
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Joined: Jul 15, 2008
Posts: 75

PostPosted: July 29, 2008, 1:45 pm    Post subject: Re: Setting a carb up for open exhaust

Forgot to mention I'll be using baffles if that matters, and those XSPerformance K&N filers on the carbs Very Happy
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tweedy64
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Joined: Aug 17, 2007
Posts: 278
Location: wiltshire, England

PostPosted: July 29, 2008, 1:52 pm    Post subject: Re: Setting a carb up for open exhaust

Dont use those cheap round filters, i use those xs performance filters much better. what year is it?
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krunk
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Posts: 75

PostPosted: July 29, 2008, 2:41 pm    Post subject: Re: Setting a carb up for open exhaust

1979 XS Special Very Happy
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Finksies
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Joined: Jan 26, 2008
Posts: 178
Location: Windham, NH

PostPosted: July 31, 2008, 12:57 pm    Post subject: Re: Setting a carb up for open exhaust

I got jets coming from mikes. I took the tip off 650motorcycles for the jet sizes. Mines an 1980 So I guess it lean from the factory. It tells sizes there for 1970's with strait exhaust. Try there first, then i guess its gunne be a trail and error thing.
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cdn650er
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Joined: Jul 30, 2008
Posts: 4

PostPosted: July 31, 2008, 4:18 pm    Post subject: Re: Setting a carb up for open exhaust

well i hope you have better luck than me but i was using 38 vm round slide carbs and 2 inch pipes hade to make exhaust port optimizers 180 mains 25 pilot jets air jet removed id have to check what needle im back to the carb came off of a 700cc polaris sled it has taken me 2 months to get it to run rite good luck i hope i can help if you need more info
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