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Main Area => General GS500 Discussion => Topic started by: toronto_moto on June 05, 2009, 02:10:43 PM

Title: '07 carbs on an '89 GS500
Post by: toronto_moto on June 05, 2009, 02:10:43 PM
Hi Everyone,

I've done some searching and couldn't find an exact answer to this question.

I have an 89 GS500 and have access to 07 carbs. I just want to know of all the issues related to using these carbs.

I will be swapping the controls out on the bike (new ones will also be from an 07) so I will have the right length throttle cables (and the push pull setup).

My question is: Is there anything else I should be concerned with?

Are there any extras on the new carb, ie. emissions stuff, etc.

Thanks
Title: Re: '07 carbs on an '89 GS500
Post by: jeremy_nash on June 07, 2009, 08:58:35 PM
as long as your new carbs arent from california, I would say they will do just fine.  just remember in the future if your gonna be rejetting, to remember that you have the newer carbs
Title: Re: '07 carbs on an '89 GS500
Post by: jrains89 on June 08, 2009, 12:28:10 AM
the newer carbs have three jets instead of two. shim the needles with two number 3 washers, trust me it's awesome.  it will work fine
Title: Re: '07 carbs on an '89 GS500
Post by: toronto_moto on June 08, 2009, 06:49:25 PM
thanks for the info.

I just wasn't sure if I needed anything other than the new controls and wanted to be certain.
Title: Re: '07 carbs on an '89 GS500
Post by: bill14224 on June 08, 2009, 08:51:34 PM
Newer carbs have a throttle position sensor.  Make sure you get that too.  It'll need power, so a little electrical work is needed.  If you have old intake rubber you'll need new ones because they're a little smaller for the old carbs.
Title: Re: '07 carbs on an '89 GS500
Post by: mach1 on June 09, 2009, 09:06:57 AM
Yup they'll fit but might not work properly they have a tp sensor and your harness doesn't have a connector for it. You would need a newer harness as well to complete the circut. But hey its your bike mickey mouse the senor and do your best or get a harness and do it right.
Title: Re: '07 carbs on an '89 GS500
Post by: toronto_moto on June 10, 2009, 12:56:22 PM
so if I have the full wiring harness as well I'll be fine?


Title: Re: '07 carbs on an '89 GS500
Post by: ineedanap on June 10, 2009, 01:06:45 PM
I'm pretty sure the TPS sensor has no effect on the internal workings of the carb.  I just sends an output to the "computer".  The "computer" uses that information to tweak the ignition timing in relation to throttle position.  Since the old style E model "computer" doesn't take throttle position into effect when controlling timing it won't matter if it's hooked up or not.  

I like using the word "computer".  It makes the GS sound more hi-tech  :D
Title: Re: '07 carbs on an '89 GS500
Post by: mach1 on June 10, 2009, 03:55:03 PM
its their might as well use is maybe get a lil more mpg our of you bike but its not needed.