BB 351, DJ 300, F/A screw, HMF can, CA smog delete

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  #11  
Old 03-23-2009 | 01:20 AM
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Originally Posted by b_joannblue
We have found out that no matter what carb you are using go one size jet richer on pilot & up two richer on main jet.
Bill
B&B Cycle Restoration
Would this be two up from the stock jetting?
 
  #12  
Old 03-23-2009 | 02:09 AM
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Kawi part #s
92064-1108 = 40 keihin pilot
92064-1050 = 38 keihin pilot - be prepared with both pilot jets for dialing it in.

Be prepared with a bigger main jet also, DJ 132 main = 142 keihin main < I'm not 100% sure of this tho. Found this on one of the forums.

Your header flange i.d. has been grinded out to match the exhaust port/copper gasket i.d. ?
 
  #13  
Old 03-24-2009 | 02:24 AM
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Originally Posted by RaceGass
Your header flange i.d. has been grinded out to match the exhaust port/copper gasket i.d. ?
I'm really not understanding what you are asking here. The head pipe is stock, and when I pulled out the muffler there was no gasket. The only gasket I could find was between the head pipe and the engine exhaust outlet.
 
  #14  
Old 03-24-2009 | 02:35 AM
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1 step up on pilor & 2 steps up on main jet.
This is the rule we use when installing the 351 kit. This is up from what ever jetting you are using at this time.
Bill
B&B Cycle Restoration
 
  #15  
Old 03-24-2009 | 03:07 AM
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All three have been modified - header flange inside diameters matched to the cylinder exhaust port i.d. and the copper exhaust flange gasket i.d.

There is a weld bead in there that hinders flow.
 
Attached Thumbnails BB 351, DJ 300, F/A screw, HMF can, CA smog delete-copy-fmfpowerbomb-006.jpg   BB 351, DJ 300, F/A screw, HMF can, CA smog delete-copy-fmfpowerbomb-015.jpg  

Last edited by RaceGass; 03-24-2009 at 03:09 AM.
  #16  
Old 03-09-2010 | 10:57 PM
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What size is the stock pilot jet on these bikes? If I were to go up by one on the pilot jet, which one should I buy?
 
  #17  
Old 03-09-2010 | 11:11 PM
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Stock pilot is a 35, stock main is a 118.
 
  #18  
Old 03-09-2010 | 11:14 PM
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Thanks Dan, so by Bill's logic, I should go to what, a 36? Is that the next size up on a pilot jet?
 
  #19  
Old 03-09-2010 | 11:18 PM
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http://www.jetsrus.com/

Go to the Keihin tab and click. to see what jet your carb needs look at the bottom of that page to see this chart.

The pilot, or slow, jet is the N424-25B
The main is the 99101-393
click on those links on the keihin page and you will see the sizes and prices.
Dan

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Last edited by dan888; 03-09-2010 at 11:21 PM.
  #20  
Old 03-09-2010 | 11:26 PM
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Thanks Dan, it looks like the 38 is the next size up. Since they are cheap, I'm buying the 40 too. I appreciate the link!
 


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