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Injected wrote: I checked with buddy and he said that the RS34's come standard with a #9DZHO1 jet needle which is the leanest they list for the RS series... he is using the #9DZH04 which is 2 sizes richer. The standard needle jet is a #P4... The tech at Mikuni said that if that needle was not rich enough he would be required to go to a #P5 (richer) needle jet and its matching leanest jet needle. He first started changing out the pilots jets as he had extras on hand... he went as big as #25's,but once he changed the needles he went back to the standard #17.5's... mains remained constant at 122's.
The jet needle accounts for throttle settings from 1/4-3/4, so that is half the throttle input...
they are special on the RS because they have two distinct tapered sections which I believe could result in more of a "tune up" window.
Sorry for the lingo confusion... I casually just use needle, bleed pipe, and main/pilot - that's all I have ever know.
This solved a particular issue for someone - I just wanted to pass it along if you think it could be of any use... I think he mentioned it was around $60 to swap them out!
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mark1122 wrote:Injected wrote: I checked with buddy and he said that the RS34's come standard with a #9DZHO1 jet needle which is the leanest they list for the RS series... he is using the #9DZH04 which is 2 sizes richer. The standard needle jet is a #P4... The tech at Mikuni said that if that needle was not rich enough he would be required to go to a #P5 (richer) needle jet and its matching leanest jet needle. He first started changing out the pilots jets as he had extras on hand... he went as big as #25's,but once he changed the needles he went back to the standard #17.5's... mains remained constant at 122's.
The jet needle accounts for throttle settings from 1/4-3/4, so that is half the throttle input...
they are special on the RS because they have two distinct tapered sections which I believe could result in more of a "tune up" window.
Sorry for the lingo confusion... I casually just use needle, bleed pipe, and main/pilot - that's all I have ever know.
This solved a particular issue for someone - I just wanted to pass it along if you think it could be of any use... I think he mentioned it was around $60 to swap them out!
Can u help me understand this. u are calling the needle and jet the same thing so i need clarification.(No-I pointed it out the # in the exploded view) did he change both the needle and emulsion tube or just the needle?(just the needle)
is there are range of needles that match the tube(Yes), and if that is not enough fuel u would then increase to the next size tube and its smallest matching needle?(Yes - all info is available in Sudcos Mikuni catalouge - pg126-7 pg129-30)
as u know, i have a small low end bog, so this is of great interest to me. i have not the resources to tackle an air box like his, but it would be worth trying some dif jetting.
Did he do this before or after he added the airbox ? (He figured it out when the pods were still on but he had already started the air box... the box ended up making it run even better, but it might have not been necessary - he called Mikuni and Winners Circle about the needles)
(He had a stock air box on his bike from a 82 KZ750 (one with 34's) and it fit - he said it could be adapted to work with the RS34's, but it looked ugly to him)
Thanks
M
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Injected wrote:mark1122 wrote:Injected wrote: I checked with buddy and he said that the RS34's come standard with a #9DZHO1 jet needle which is the leanest they list for the RS series... he is using the #9DZH04 which is 2 sizes richer. The standard needle jet is a #P4... The tech at Mikuni said that if that needle was not rich enough he would be required to go to a #P5 (richer) needle jet and its matching leanest jet needle. He first started changing out the pilots jets as he had extras on hand... he went as big as #25's,but once he changed the needles he went back to the standard #17.5's... mains remained constant at 122's.
The jet needle accounts for throttle settings from 1/4-3/4, so that is half the throttle input...
they are special on the RS because they have two distinct tapered sections which I believe could result in more of a "tune up" window.
Sorry for the lingo confusion... I casually just use needle, bleed pipe, and main/pilot - that's all I have ever know.
This solved a particular issue for someone - I just wanted to pass it along if you think it could be of any use... I think he mentioned it was around $60 to swap them out!
Can u help me understand this. u are calling the needle and jet the same thing so i need clarification.(No-I pointed it out the # in the exploded view) did he change both the needle and emulsion tube or just the needle?(just the needle)
is there are range of needles that match the tube(Yes), and if that is not enough fuel u would then increase to the next size tube and its smallest matching needle?(Yes - all info is available in Sudcos Mikuni catalouge - pg126-7 pg129-30)
as u know, i have a small low end bog, so this is of great interest to me. i have not the resources to tackle an air box like his, but it would be worth trying some dif jetting.
Did he do this before or after he added the airbox ? (He figured it out when the pods were still on but he had already started the air box... the box ended up making it run even better, but it might have not been necessary - he called Mikuni and Winners Circle about the needles)
(He had a stock air box on his bike from a 82 KZ750 (one with 34's) and it fit - he said it could be adapted to work with the RS34's, but it looked ugly to him)
Thanks
M
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