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easttnrhino

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Number of posts : 28
Registration date : 2009-04-23

carb vacuum slide Empty
PostSubject: carb vacuum slide   carb vacuum slide EmptyTue Oct 13, 2009 4:42 pm

I read where cutting a inch off the vacuum slide spring helped acceleration, how does that help and has anyone tried it? Thanks
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4x4pac

4x4pac

Number of posts : 475
Registration date : 2009-06-03
Age : 50
Location : Southern Illinois

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptyTue Oct 13, 2009 5:15 pm

Dont do this unless you want to be looking for another carb spring.
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2Slow4U
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2Slow4U

Number of posts : 1657
Registration date : 2009-05-18
Age : 67
Location : Sevierville, Tennessee

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptyTue Oct 13, 2009 5:49 pm

mudandguts said he did this to his 450. I haven't tried it.
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easttnrhino

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Number of posts : 28
Registration date : 2009-04-23

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptyTue Oct 13, 2009 6:11 pm

Well go out and cut yours and let me know
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ridepate
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ridepate

Number of posts : 6409
Registration date : 2009-04-23
Age : 59
Location : 1st join date- 1/22/2008- North Ga.

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptyTue Oct 13, 2009 7:06 pm

Get a Dyno-Jet kit ,it comes with a less-resistant spring. I would not cut the stock spring.

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Mud-and-Guts
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Mud-and-Guts

Number of posts : 1839
Registration date : 2008-09-22
Age : 40
Location : celina,tn

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptyTue Oct 13, 2009 9:52 pm

I cut the stock spring and ran it for a while it worked fine for me and many others. It allows the carb to open up quicker and accelerate slightly faster. I got the dyno-jet kit and run that spring now which is about the same in tension and size as the stocker cut.
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easttnrhino

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Number of posts : 28
Registration date : 2009-04-23

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptyTue Oct 13, 2009 10:14 pm

Thanks
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Mud-and-Guts
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Mud-and-Guts

Number of posts : 1839
Registration date : 2008-09-22
Age : 40
Location : celina,tn

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptySat Oct 17, 2009 10:33 am

Cutting this spring is something I have done a lot of research on (before cutting my own) I was skeptical at first but after talking with several racers and engine builders who use this trick I decided to try it myself. I ordered an extra spring from Yamaha the first time I did it just in case (they are cheap just a couple bucks).
It would get real expensive for an engine builder to order a jet kit for each bike they work on when instead of buying a dyno-jet jet kit they keep mikuni jets and shims in the shop for jetting and shimming the needle and cut the spring instead of paying 50$ for one that does the same thing.
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easttnrhino

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Number of posts : 28
Registration date : 2009-04-23

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptySat Oct 17, 2009 11:19 am

I cut 3/4 off mine yesterday very happy and no flutter at wot
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easttnrhino

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Number of posts : 28
Registration date : 2009-04-23

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptySat Oct 17, 2009 11:50 am

I cut 3/4 of a inch off
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wvyankee2
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wvyankee2

Number of posts : 10317
Registration date : 2008-01-22
Age : 59
Location : Cabell Co., West Virginia

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptySat Oct 17, 2009 1:17 pm

easttnrhino wrote:
I cut 3/4 off mine yesterday very happy and no flutter at wot



How do you feel the engine response is from this Mod?
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easttnrhino

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Number of posts : 28
Registration date : 2009-04-23

carb vacuum slide Empty
PostSubject: Re: carb vacuum slide   carb vacuum slide EmptySat Oct 17, 2009 3:05 pm

The throttle respone is quicker but I would only say a small amount but price of the mod is good
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