Joined Nov 2001
17K Posts | 774+
Ely, England
kez said:
an OC needle means that it's a brass needle produced for the factory direct to the customer it is brown to look at. the OB needle is an anodised needle and therefore hardened. it is polished alloy/chrome to look at in appearance. this needle is more expensive and is usually an OEM item for the manufacturers of the bikes. in other words i will order an OC from sudco but can order from a huge variety of OEM needles that yam and hinda make (etc) and it'll come as an OB.
to remember it the easy way the B DOESN'T stand for brass!
the anodised last for ever but are more expensive. i would order a OB everytime.
regards
Taffy
Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
"The B DOESN'T stand for brass!"
Reverse logic, I like that.
Personally, I prefer the brass.
Best Regards,
Dale
Reverse logic, I like that.
Personally, I prefer the brass.
Best Regards,
Dale
Though It Wasnt Much,Knew The Main Ones Were The Last 3 Normally.
I Spoke To TM UK About Jettings For Their SM Bikes And Personal EN's Like Mine For A Starting/Referance Point,Was Told That They Use The OBDVR On All But The Works 570's.
Was Told "With That Needle You Get Loads More Bottom Over Standard"
Seemed To Remember My Needle Being DMM So I Said,Yep I'll Have One.
The Post Turned Up This Morning With OCDVR.
Just Wanted To Know That I Had The Right Needle And What The B/C Differences Were.
Cheers
I Spoke To TM UK About Jettings For Their SM Bikes And Personal EN's Like Mine For A Starting/Referance Point,Was Told That They Use The OBDVR On All But The Works 570's.
Was Told "With That Needle You Get Loads More Bottom Over Standard"
Seemed To Remember My Needle Being DMM So I Said,Yep I'll Have One.
The Post Turned Up This Morning With OCDVR.
Just Wanted To Know That I Had The Right Needle And What The B/C Differences Were.
Cheers
Joined Nov 2001
17K Posts | 774+
Ely, England
that is one helluva leap you've done there!
the needle you bought must be put in 5 (yes 5) clips away from your old needle. so if your DMM was clip 4 this one must be in the lowest and last clip position.
you'll find the way you start and the way it idles has totally changed. be ready to buy a different choke jet and twiddle the PS.
regards
Taffy
the needle you bought must be put in 5 (yes 5) clips away from your old needle. so if your DMM was clip 4 this one must be in the lowest and last clip position.
you'll find the way you start and the way it idles has totally changed. be ready to buy a different choke jet and twiddle the PS.
regards
Taffy
Oh Bugger! :lol: Looks Like I'm Going To Be Busy Then. :roll:
What Size Choke Then? Larger I Take Then?
Going To Get Me A PAS And Use A 38PJ And 160MJ,Which I've Been Told Works Very Well From The Boys In Oz.
Dont Know What Needle They Run Though.
So Is This Needle Richer Or Leaner Than The DMM?
Since I'm Coming Down From 50/180 As It States In The Manual To 38/160, Do I Need To Drop The MAJ As Well? Should Be 200 And Bring That Down To 190-180?
I Sort Of Followed Your Thread On TT About A Higher MAJ Make The Bike Rev Out Better And Helps Make Its Top End Power While A Lower MAJ Helps Makes Its Peak Torque But Doesnt Rev Out So Good.
Or Have I Missed The Point?
What Size Choke Then? Larger I Take Then?
Going To Get Me A PAS And Use A 38PJ And 160MJ,Which I've Been Told Works Very Well From The Boys In Oz.
Dont Know What Needle They Run Though.
So Is This Needle Richer Or Leaner Than The DMM?
Since I'm Coming Down From 50/180 As It States In The Manual To 38/160, Do I Need To Drop The MAJ As Well? Should Be 200 And Bring That Down To 190-180?
I Sort Of Followed Your Thread On TT About A Higher MAJ Make The Bike Rev Out Better And Helps Make Its Top End Power While A Lower MAJ Helps Makes Its Peak Torque But Doesnt Rev Out So Good.
Or Have I Missed The Point?
Joined Nov 2001
17K Posts | 774+
Ely, England
Kez
the main air jet is relevant to the power curve of THAT bike. whatever that bike is. however, it appears that keihin have given up giving OEM that choice because they come with 200 or nuffink it seems...
yes i was the first to get that correlation right. until then they had all gone the other way to 230's etc. that includes JD and was the day i "marked his card". until then i didn't know what he knew but after it i knew exactly what he knew (too which DL would agree with me = NAL)
your figures are frightening. sensory overload! you can't possibly expect anybody to correlate a needle that is 5 clips different and then a MJ change that is as close as monday is to bloody friday!
sorry can't help. what i can say is this (puts his inspector cluessau hat on) that if you had a huge MJ and now they want you to have a tiny jet either of two things have happened. first, you were way over jetted. or two, that the quoted figure is for an 'E' series needle coming from a 'D' series needle.
leave the 200MAJ as is and PM me with all the coughs and splutters you're gonna get!
a DVR on clip 6 is the equivelant and identical to a DMM needle on clip 1.
so:
DMM c1 = DVR c6
DMM c2 = DVR c7
however, if you have been overjetted your DMM should have been on c1 or c2 anyway. the rule is that if the MJ goes up the needle can be dropped and if the bike leans out the MJ the needle can be raised.
trouble is for you-bless your cotton socks - you don't really know WTF was going on (in the nicest way you understand). but if you're PH.... with a 160MJ you gotta know your onions this time. you go down to 160MJ and you better know your stuff or learn it quickly because any fool can overjet but you'll have to work hard to get it rumbling at a 160. good luck and there's nothing i can't cure. just chuck it at me.
just don't be a *** like we've had here recently and rev it up on choke on the belly stand and announce that it's lean...
good luck
Taffy
the main air jet is relevant to the power curve of THAT bike. whatever that bike is. however, it appears that keihin have given up giving OEM that choice because they come with 200 or nuffink it seems...
yes i was the first to get that correlation right. until then they had all gone the other way to 230's etc. that includes JD and was the day i "marked his card". until then i didn't know what he knew but after it i knew exactly what he knew (too which DL would agree with me = NAL)
your figures are frightening. sensory overload! you can't possibly expect anybody to correlate a needle that is 5 clips different and then a MJ change that is as close as monday is to bloody friday!
sorry can't help. what i can say is this (puts his inspector cluessau hat on) that if you had a huge MJ and now they want you to have a tiny jet either of two things have happened. first, you were way over jetted. or two, that the quoted figure is for an 'E' series needle coming from a 'D' series needle.
leave the 200MAJ as is and PM me with all the coughs and splutters you're gonna get!
a DVR on clip 6 is the equivelant and identical to a DMM needle on clip 1.
so:
DMM c1 = DVR c6
DMM c2 = DVR c7
however, if you have been overjetted your DMM should have been on c1 or c2 anyway. the rule is that if the MJ goes up the needle can be dropped and if the bike leans out the MJ the needle can be raised.
trouble is for you-bless your cotton socks - you don't really know WTF was going on (in the nicest way you understand). but if you're PH.... with a 160MJ you gotta know your onions this time. you go down to 160MJ and you better know your stuff or learn it quickly because any fool can overjet but you'll have to work hard to get it rumbling at a 160. good luck and there's nothing i can't cure. just chuck it at me.
just don't be a *** like we've had here recently and rev it up on choke on the belly stand and announce that it's lean...
good luck
Taffy
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