IS Carb springs on Tourer

[97Valk_CT_Euless]

I've seen on here that the IS carb springs will improve the throttle response of the Standard and Tourers.  (Not that it's bad anyway... but more is better, right?) Are we talking about spring #11 in the fiche? (97 CT #11=16050-MZ0-000, 2000 CF #11=16050-MBY-671).  Pretty reasonable at $2.42 each.  The reason I ask is that #12 spring (which I can't remember seeing on mine) is the same on both bikes (Must not be it) but the dagum thing is $10.83 each!!!

Just checkin.

Thanks

[9Ball]

Here's what you need...

http://www.directlineparts.com/product.asp?pid=750&str=0&mdl=1539&mdy=1999

good luck

[Patrick]

The spring folks talk about changing is the large spring in the vacuum chamber not the small needle spring.

[97Valk_CT_Euless]

Ok. Thanks guys. Seemed pretty obvious but wanted to be sure. Couldn't see how the needle spring would do anything but I guess I was as much as anything shocked at the price of the needle springs.
Thanks again.

[rhinor61]

Pretty straight forward swap.
I saw more pull in the mid-range power band just like they say.

I did a dyno run after with 62,000 miles on the bike...
got 95hp and 105ft lbs of torque.

Did MPG suffer.. when you have this much power and beauty between you legs.. MPG is the last thing you should be thinking about.

Just keep the old parts.. in a zipper bag.. just in case...

have fun...



John
Cali.

[97Valk_CT_Euless]

Thanks all.  Always keep everything (Ok, not old oil filters... I've been known to let an air filter hang around awhile though...) Even still have all the PAIR valves/fittings.  Yeah, my garage is a mess.

[Chiefy]

Thanks all.  Always keep everything (Ok, not old oil filters... I've been known to let an air filter hang around awhile though...) Even still have all the PAIR valves/fittings.  Yeah, my garage is a mess.

I feel your pain.

[Disco]

Hey Euless,

Not to rain on anyone's parade, but I did the IS carb spring mod a couple of years ago and couldn't tell the difference.  It's a cheap enough mod to give it a try if you want to, though.  Hopefully, you'll be like everyone else and be satisfied. 

And yes, the springs I put in were different than the springs I took out.   

Next up for me is the IS ECM mod.  I've had one on the shelf for a while, just haven't gotten a round tuit... 

Disco

[97Valk_CT_Euless]

Absolutely want to get her an IS ECM. With the 4deg I have I think that'll be a sweet deal. Was thinking about the spring mod like you said, pretty cheap, and not too much time
Reversable too. I'm more concerned about mileage than power, (she has plenty) and I doubt the springs help mileage, but I do succumb to the old girls wiles time and again, and she seduces me into rolling the throttle around.  Sure feels good.

[98valk]

the weaker I/S springs act like an accelerator pump by allowing the needle to rise faster thereby allowing more fuel sooner into the air stream. if the engine wants the added fuel it will make more power, if it doesn't need it then same or less power.

[PharmBoy]

For me, the I/S ECM swap and the I/S carb spring swap didn't make it a rear tire smoker, but it did make any roll on of power much smoother and a little faster without any hesitation.  I think that both are worth the time and effort.  Each swap is simple to do and doesn't take very much time...Jim 

[Farther]

For me, the I/S ECM swap and the I/S carb spring swap didn't make it a rear tire smoker, but it did make any roll on of power much smoother and a little faster without any hesitation.  I think that both are worth the time and effort.  Each swap is simple to do and doesn't take very much time...Jim 

My experience too on my '03 Standard.  I was experiencing a mild surg at low speed/low RPM and that is completly gone.

[97Valk_CT_Euless]

Got too much money and time in the final drive to be smokin the rear tire anyway!     But I do like to feel the power somtimes.  Also would like to eeke out as much gas mileage as I can, makes it easier to justify riding the old gal to work every day I can!  Then of course when she's saming me all this money, it makes sense to get that IS for road trips! he he

[Brian]

Here's what you need...

http://www.directlineparts.com/product.asp?pid=750&str=0&mdl=1539&mdy=1999

good luck

Thanks for posting this part info as I too wondering the same thing.

[R J]

Here's what you need...

http://www.directlineparts.com/product.asp?pid=750&str=0&mdl=1539&mdy=1999

good luck

Thanks for posting this part info as I too wondering the same thing.

PS:   One package is all that is needed.    The set goes for $14.99 + ship/handling..

[Valkpilot]

the weaker I/S springs act like an accelerator pump by allowing the needle to rise faster thereby allowing more fuel sooner into the air stream. if the engine wants the added fuel it will make more power, if it doesn't need it then same or less power.

That's a great, simple explanation, CA.   Thank you.