I am looking at a full set of Vane and hines. I am wonder are they worth the 300 buck I know i going to have to go with 150 main.Is there something better that i want have to make a flange for .

They are $300 new. I had one on my '92 and it was nice. You can find one used for a better price, though.

Also, you don't HAVE to go with a 150 main jet. The bike runs rich in the upper end stock, so bumping the mains up that size is excessive and will only make the bike run extremely rich and destroy your gas mileage. I jetted mine to a 137.5 main from a 130 and changed it back because it ran WAY WAY WAY too rich. I was getting popping in the exhaust on decelleration from unburned fuel. I killed my gas mileage by 10mpg with that rejet. Think how much worse it would have been with a 150!

Do a Search for information on the V&H exhaust. There are lots of old threads that discuss pros and cons. Also do a search on exhaust options for the GS, or check out the FAQ by Phaedrus. http://gstwin.variders.com/

I have 130 with stoch exhaust and K&N pods now.

You might need to bump it up to a 135 or 137.5 with pods and exhaust, IMO. Bumping it up to 150 is bumping it up EIGHT sizes. That is useless and counterproductive, I think. Others might tell you differently, but I don't believe it for a second that 150 is a good jet size, especially for a low compression engine like the GS's.

alpha are you talking about on a post 01 GS.  I was going back and searching older posts and the rejetting matrix post about what folks are running.  I hav e a 96 with the K&N pod and V&H. I'm running 150/40 at 3 turns out. Plugs look pretty good, I do get some popping on decel and lousy gas mileage. I was thinking about dropping down to 147.5 mains this winter when i have it apart.

jake

Quote from: jake42alpha are you talking about on a post 01 GS.  I was going back and searching older posts and the rejetting matrix post about what folks are running.  I hav e a 96 with the K&N pod and V&H. I'm running 150/40 at 3 turns out. Plugs look pretty good, I do get some popping on decel and lousy gas mileage. I was thinking about dropping down to 147.5 mains this winter when i have it apart.

jake

Popping on decel means it is WAY too rich. Even if it doesn't pop it is most likely still rich. The popping just means that is is SO rich that the fuel cannot entirely combust and is pushed through the exhaust where it ignites, causing the popping. 147.5 will probably be too large of a size, IMO. It comes rich on the top end (where the mains deal with) from the factory.

Yeah, I was talking about my 2004 model. The 1st gen carbs use an even SMALLER main and are still rich at the top end. This is evidenced by the air/fuel mix graph we saw from this thread: http://www.gstwins.com/forum/viewtopic.php?t=21789&start=0

You can see that in the upper range the bike is running rich factory stock.

There are two types of popping - a lean pop on off-throttle, and a backfire from running too rich.  Your plugs will tell the story.

The carb goo rue here says 140/40 3 turns on a 1999 with pods.

Yeah. I differ with the "guru" on carb jetting opinions.

Srinath knows all about carbs. I have got mine so I can change the main with out pulling the cabrs just drop the bowl so I will try different one to see what works.I just would like to find a cheaper price than 300 bucks for a aftermarket pipe.

Quote from: ditchdoc1017I just would like to find a cheaper price than 300 bucks for a aftermarket pipe.

And you don't like flange + wileyco because?

Quote from: ditchdoc1017Srinath knows all about carbs.

Eh. Maybe.

mine pops when i'm off throttle.  i'm not so rich as to be fouling plugs with 150's in right now.  My gas mileage did take a mighty hit on rejet though.

Quote from: jake42mine pops when i'm off throttle.  i'm not so rich as to be fouling plugs with 150's in right now.  My gas mileage did take a mighty hit on rejet though.

If you're running a 150 and you're popping, you're ass in the sky rich as can be. You don't have to foul the plugs to run rich. Plus, the fouling of plugs can happen over time. You might cut their life in half or more by running so rich. Rejetting should be used to smooth things out and allow smooth power, especially between idle and ~2500 rpm. When I rejet I want to be able to let the clutch out at idle and be able to give it a tiny bit of throttle and have it climb from 1300 to 1500 or 1700 RPM, not jump to 3000.

The '91 PITA was lean on 150s due to pod filter and massive exhaust leaks.  Plug fouling can happen purty quick.

Quote from: RoadstergalThe '91 PITA was lean on 150s due to pod filter and massive exhaust leaks.  Plug fouling can happen purty quick.

Yeah. Exhaust leaks can f%$k things up majorly, as can pod filters.

Quote from: Roadstergal

Quote from: ditchdoc1017I just would like to find a cheaper price than 300 bucks for a aftermarket pipe.

And you don't like flange + wileyco because?

I do like the Wiley co but dont want to have to mess with getting a Falnge made.

There might be another bunch coming out.

http://www.gstwins.com/forum/viewtopic.php?t=21930

I got one with the Wileyco from Srinath.  Falling off a log has proven more challenging in the past.

Migh be the way to go Thanks.

Popping on decel doesn't mean rich at all ... rich is typically signified by a soft or gutless wet fart type response and similar noise when opening the throttle ... backfiring from the exhaust on a shut throttle is in some cases lean and in other cases means nothing significant ... cos even with 150's, heck with 160's ... shut throttle = lean ... you're essentially trying to fuel a motor running 5-6-7 k rpm with a air screw and part of the pilot curcuit ... jetting depends on throttle position ... not rpm ... no way you're rich on shut throttle ... you can run 200 mains and still be lean at shut throttle ... running 60 pilots may make a small diff ...
150/40/3/1 for pod and pipe ... but if you're running fine at 140 or at 137.5 ... you need to check your float level ... if that is 1/4 inch high that may explain the 140 running right. But 150 is possibly 1 size too big, but its the largest size that will let you run fine in winter or summer and its the largest that will work without a significant loss in power with a larger jet. If you dont have stock needles that 150 number isn't right ... its only with stock needle.
Cool.
Srinath.