Part # for FHN or FKN?



3 replies to this topic
  • Jason_Williams

Posted September 18, 2001 - 08:26 AM

#1

Can I get these needles from Yamaha or do I have to order them through Sudco?
I ordered a FKN through the dealer and its back ordered. Of course they never bothered to tell me that until two weeks later. Then I run into the same thing about the EKP. They say its a different needle than a FKN. I'm confused. ( any one want to start a dealership were the people actually know what they are doing???) :) anyway thanks for any info you guys might be able to share
Jason

  • James_Dean

Posted September 18, 2001 - 10:35 AM

#2

Those are Yamaha only needle numbers. If you want to use the less expensive brass needles try these from Sudco:

FKN#5 = FHN#4
FKM#5 = FHM#4
EKP#4 = EMP#5

Availability is usually good. (1-800-998-3529)

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  • Jason_Williams

Posted September 18, 2001 - 11:16 AM

#3

James I would prefer to have the Yamaha needles. I tried to order the FKN on your recommendation and used PN 5JG 14916 FN. This PN is back ordered. It also comes up as a funky needle code not as a FKN. But I'm sure you are right. So I would like to order the FHN but do not have the PN for it. I tried to have the dealer look it up with no luck. If you have the yamaha PN for FHN that would help. I was wondering were you order your Yamaha needles from here in Washington. I seem to be having bad luck being able to get any help except from you. I am also wondering if you might have a chart or graph of needles and how they might look lean to rich. Like how to compare a drr with a fkp for an example. I read Taffys post on the explanation of the needle and that helped out alot. I also just read a post from last march about the maj passage and drilling it out to 2.78mm and trying a maj drilled with a #44 bit 2.2mm or a 3/32 2.38mm and that might help out with the 3/4 to WOT. Going to give this a rip. you mentioned that it might help out with the F_ _ needles. Let me know if your up for a ride with a novice jetting person like my self. Looks like your just down the road. E-mail me if you'd like at jasonw@seanet.com I ride almost every weekend. ( as long as the wife allows) :) Thanks again
Jason

[This message has been edited by Jason Williams (edited September 18, 2001).]

[This message has been edited by Jason Williams (edited September 18, 2001).]

  • James_Dean

Posted September 18, 2001 - 12:48 PM

#4

OB needles are hard coated Yamaha needles. OC needles are brass and come from Keihin.

I have made it confusing for you. OBFKN and OBEKP are the Yamaha needles. The Yamaha parts probably show FVN and EVP incorrectly.

OCFHN is a brass needle of the same profile as OBFKN, shifted by 1 clip position. They are identical other than FHN is brass. No point in getting both.

The dealers are usually clueless on these non-standard parts, they rarely order them.

I don't have a graph made on these for you to compare. FH-, EM-, and DV- needles have their tapers start very close to each other at about 2.70mm. DR- has about a 2mm higher start and needs a leaner clip position. EM- richens more at mid-throttle than DR- or DV- needles. FH- adds more fuel yet at mid-throttle.




 
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