jetting

Ernest Montague afm199 at earthlink.net
Wed Oct 3 09:36:15 PDT 2007


shim needles 40 thou and change pilots to 17.5 minimum.


On Oct 3, 2007, at 9:23 AM, Erik Weber wrote:

> I would like to jump in on this thread while it's on your minds.
>
> My airbox, filter and exhaust are all stock.
>
> I am planning to go to a full system. I want to build for superbike so
> I am looking for the lightest system, which I assume is the "deluxe"
> M4 full system.
>
> My bike has standard first gen S gearing. Pulls great once you get
> rolling but not so great out of slower turns.
>
> So, what should I do with jetting to get a little better midrange
> without sacrificing top end? Or what's a good baseline jetting for M4
> full system with stock airbox and filter?
>
> Thanks,
> Erik
>
>
> On 10/3/07, KC Gager <kc at brgracing.com> wrote:
>> We have played with all the needles that are out there. None are 
>> perfect.
>> But like I said have bring it by and we can get you pointed in the 
>> right
>> direction.
>> KC Gager
>> BRG Racing Products
>> "We Have Sickness For Quickness"
>> KC at brgracing.com
>> http://www.brgracing.com
>> (925)672-5789
>>
>>
>> -----Original Message-----
>> From: Ernest Montague [mailto:afm199 at earthlink.net]
>> Sent: Wednesday, October 03, 2007 8:51 AM
>> To: Suzuki SV650 Mailing List
>> Subject: Re: jetting
>>
>> KC;
>>
>> Actually it is for Ian Gillies, he picked up a bike for the track. The
>> factory (Salvisberg) needle is mid clipped AND shimmed 40 thous and I
>> think that is wayyy to fat.
>>
>> Thanks though.
>>
>> One of these days I will get over there.  Probably this winter.
>>
>>
>> Ernie
>>
>>
>> On Oct 3, 2007, at 8:38 AM, KC Gager wrote:
>>
>>> Ernie
>>> More then likely the needle placement is off. If you want come by 65
>>> buck
>>> I'll base line it and tell witch way to go on the needle. I'm sure 
>>> you
>>> can
>>> change it with out help :-). Reno in most case wants more fuel up
>>> there.
>>>
>>> KC Gager
>>> BRG Racing Products
>>> "We Have Sickness For Quickness"
>>> KC at brgracing.com
>>> http://www.brgracing.com
>>> (925)672-5789
>>>
>>>
>>> -----Original Message-----
>>> From: Ernest Montague [mailto:afm199 at earthlink.net]
>>> Sent: Wednesday, October 03, 2007 8:26 AM
>>> To: Suzuki SV650 Mailing List
>>> Subject: Re: jetting
>>>
>>> This is for a friend's bike that he got with 140 mains, a pipe, K&N,
>>> and needles from factory.  The midrange at Reno Fernley sucks.   I
>>> think the needles are too high, the mains too small and I am going 
>>> with
>>> either a stock filter for the 140 mains, or 150s with the K&N and
>>> pipe.  Also shim stock needles 40 thou and change pilot jets.
>>>
>>> Ernie
>>>
>>>
>>> On Oct 3, 2007, at 8:21 AM, KC Gager wrote:
>>>
>>>> Was this east cost tuning or was in out here on the west cost. And 
>>>> yes
>>>> there
>>>> is a difference a big difference.
>>>>
>>>> KC Gager
>>>> BRG Racing Products
>>>> "We Have Sickness For Quickness"
>>>> KC at brgracing.com
>>>> http://www.brgracing.com
>>>> (925)672-5789
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Jim Stewart [mailto:js at strappe.com]
>>>> Sent: Saturday, September 29, 2007 6:36 PM
>>>> To: Suzuki SV650 Mailing List
>>>> Subject: Re: jetting
>>>>
>>>> Ernest Montague wrote:
>>>>> OK guys, there is a stock formula that used to work pretty well for
>>>>> gen
>>>>> one carbs with a race pipe and aftermarket filter or opened up 
>>>>> stock
>>>>> filter....
>>>>>
>>>>> Anyone remember?
>>>>>
>>>>> 148 mains?  I do remember shim the stock needles 40 thou.
>>>>>
>>>>> Ernie
>>>>>
>>>>
>>>> Hi, Ernie -
>>>>
>>>> After half a million dyno runs, Jack Roe developed a formula for
>>>> desnorkeled
>>>>
>>>> airboxes and race pipe: 152.5 mains, 17.5 pilots, two shims (.040")
>>>> under
>>>> the
>>>> needle, pilot screw at 2.5 (I think). He later recanted and
>>>> recommended the
>>>> stock 15 pilots and 3 turns. He also recommended drilling out the
>>>> bleed hole
>>>> in
>>>> the slide, but that didn't seem to make any difference on my bike.
>>>>
>>>> It turns out that the desnorkeled airbox is a bad choice for a 
>>>> street
>>>> bike -
>>>> big
>>>> flat spot at 5K or so. Maybe it works for a racebike - others can
>>>> surely
>>>> tell you.
>>>>
>>>> I have my own preferred settings for a street bike, but you're
>>>> interested in
>>>>
>>>> your racebike I assume...
>>>>
>>>> -js
>>>>
>>>> --
>>>> http://www.strappe.com
>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
>



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