GStwin.com GS500 Message Forum

Main Area => General GS500 Discussion => Topic started by: ben2go on March 06, 2008, 07:32:21 PM

Title: New Carbs
Post by: ben2go on March 06, 2008, 07:32:21 PM
I should buy these http://www.motorcyclecarbs.com/CARBURETOR_KIT_SUZUKI_GS500_D_P9231C651.cfm?UserID=1131291&jsessionid=7e301580971204640234847
Title: Re: New Carbs
Post by: scottpA_GS on March 06, 2008, 08:18:12 PM


YES !!!

  :icon_mrgreen:


Let us know what you think of em  :icon_mrgreen:
Title: Re: New Carbs
Post by: ben2go on March 06, 2008, 09:50:08 PM
I'm taken donations to purchase them.Should I put you down for the full amount?  :laugh: :laugh: :laugh: :laugh: :laugh: :laugh:


I'm just aggravated with a set of stock carbs that are giving me a problem.I'm was looking for info on the stock carbs.I came across these and started thinking about tax time next year. :cookoo:
Title: Re: New Carbs
Post by: ohgood on March 07, 2008, 07:15:04 AM
i've just purchased 2 sets of stock mikuni's for a total of $140 from gstwins members. one set is one my bike and running flawlessly for the moment with the only change being 150 mains.

i still haven't torn into my original (on the bike) set of carbs to find out what the problem was. i'm guessing a combination of dynojet + some crevice full of junk.

bug the members if you want a set cheap. :)
Title: Re: New Carbs
Post by: spc on March 07, 2008, 09:08:57 AM
Yeah, but them there are flatside carbs.   That what them crazy race junkies use :icon_rolleyes:  no vacuum= no having to worry about torn diaphragm and other shaZam!.
Title: Re: New Carbs
Post by: dgyver on March 07, 2008, 10:40:20 AM
Those are not flat slides. They are smooth bores.

I sold a set for $275. Recently I snagged a set off of ebay for $100.

Title: Re: New Carbs
Post by: ben2go on March 07, 2008, 11:13:03 AM
I thought about buying these and just using the 2 center carbs.  http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=025&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=380003882100&rd=1
Title: Re: New Carbs
Post by: dgyver on March 07, 2008, 12:35:29 PM
If you can get them cheap enough.
Title: Re: New Carbs
Post by: ben2go on March 07, 2008, 01:45:39 PM
Quote from: dgyver on March 07, 2008, 12:35:29 PM
If you can get them cheap enough.



Got'em on my watch list.
Title: Re: New Carbs
Post by: ohgood on March 07, 2008, 04:17:42 PM
can anyone enlighten me as to why the 'smooth bore' or 'side whatever' are better than the stock mikuni's since a few of you really know this stuff ?

Title: Re: New Carbs
Post by: ben2go on March 07, 2008, 05:01:54 PM
Quote from: ohgood on March 07, 2008, 04:17:42 PM
can anyone enlighten me as to why the 'smooth bore' or 'side whatever' are better than the stock mikuni's since a few of you really know this stuff ?





Below is a quoted anwser from above.


Quote from: spcterry on March 07, 2008, 09:08:57 AM
Yeah, but them there are flatside carbs.   That what them crazy race junkies use :icon_rolleyes:  no vacuum= no having to worry about torn diaphragm and other shaZam!.
Title: Re: New Carbs
Post by: ohgood on March 07, 2008, 06:13:38 PM
so it's just -another- carb, not a 'better' carb ? ok, cool, i can dig that. tanx.
Title: Re: New Carbs
Post by: dgyver on March 07, 2008, 10:05:04 PM
Mechanical carbs do not have the vacuum lag as CV carbs do. More fuel is delivered faster. More responsive. Another advantage of flat slides is that they do not
have a throttle butterfly to impede airflow at full throttle.

The disadvantage to this is that they are much less tolerant of inappropriate throttle movement. If you quickly give full throttle at low rpm, the engine may bog where CV carbs would cope.
Title: Re: New Carbs
Post by: lamoun on March 08, 2008, 02:05:12 AM
they do not have a throttle butterfly, as dgyver already said above, but you control the slide position with the throttle cable.
Title: Re: New Carbs
Post by: ohgood on March 08, 2008, 03:39:57 AM
cool, so they're less forgiving of newbie mistakes. got it. thanks for the explanations :)
Title: Re: New Carbs
Post by: ben2go on March 08, 2008, 02:48:48 PM
when I last checked they were $256 and some change.  :o I wasn't even expecting them to hit $50.
Title: Re: New Carbs
Post by: dgyver on March 08, 2008, 04:39:06 PM
Are you serious? 36mm flat slides are the most sought after. Never seen them under $300.

I pickup a pair of Mikuni 36mm flat slides from a Polaris sled for $60. Just need to figure out what would need to be changed to run straight gasoline instead of a oil/gas max.
Title: Re: New Carbs
Post by: ben2go on March 08, 2008, 06:22:31 PM
Quote from: dgyver on March 08, 2008, 04:39:06 PM
Are you serious? 36mm flat slides are the most sought after. Never seen them under $300.

I pickup a pair of Mikuni 36mm flat slides from a Polaris sled for $60. Just need to figure out what would need to be changed to run straight gasoline instead of a oil/gas max.


I thought that 2 strokes have the same carbs as 4 strokes.The difference I was thinking, was that a 500cc 2 stroke would require a little more fuel because of the oil/gas mix.I really shouldn't speculate on this be cause I've only owned one 2 stroke,a 250cc Honda Odyssy.A couple pieces of lawn equipment,also.
Title: Re: New Carbs
Post by: dgyver on March 09, 2008, 07:09:48 AM
It would be nice if all I had to do was swap jets. The main concern if the emulsion tubes are different sizes but they can be changed.