Carb specs

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begbie
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Carb specs

#1 Post by begbie » Tue Aug 27, 2013 2:00 pm

Can any one tell me the correct air jet sizes and emulsion tubes (as in i have a set with fewer holes than another set) for a 1ge Please

also how do i tell what size air jets i have, there so small i cant see any markings on them.

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zomaardan
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Re: Carb specs

#2 Post by zomaardan » Tue Aug 27, 2013 5:00 pm

Main air jet.
upper cylinder 1,8
Lower cylinder 1,6
pilot air 1,1
needle jet 0-o
And that's all I have to say about that.

http://www.youtube.com/watch?v=vG8UJZzYHDs" onclick="window.open(this.href);return false;
http://www.youtube.com/watch?v=yHFsoHd0nZI" onclick="window.open(this.href);return false;
http://www.youtube.com/watch?v=JJ5pCjnMQQg" onclick="window.open(this.href);return false;
http://www.youtube.com/watch?v=OyZfNKHPRs8" onclick="window.open(this.href);return false;

begbie
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Re: Carb specs

#3 Post by begbie » Tue Aug 27, 2013 6:59 pm

where is the Main air jet. in this picture ?

Image

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zomaardan
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Re: Carb specs

#4 Post by zomaardan » Tue Aug 27, 2013 7:45 pm

You taking me for a ride sir? Asking the specs while you have the sheet, this is part 2 of the quiz?
And that's all I have to say about that.

http://www.youtube.com/watch?v=vG8UJZzYHDs" onclick="window.open(this.href);return false;
http://www.youtube.com/watch?v=yHFsoHd0nZI" onclick="window.open(this.href);return false;
http://www.youtube.com/watch?v=JJ5pCjnMQQg" onclick="window.open(this.href);return false;
http://www.youtube.com/watch?v=OyZfNKHPRs8" onclick="window.open(this.href);return false;

begbie
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Location: UK

Re: Carb specs

#5 Post by begbie » Tue Aug 27, 2013 8:46 pm

:smile: Oh no, I thought 1ge and 47x had different air jets and emulsion tubes but i guess there the same, maybe it was the rzv that differed.
Still where is the main air jet shown in the diagram ? maybe i have them in the wrong way round.

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2smoke
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Re: Carb specs

#6 Post by 2smoke » Tue Aug 27, 2013 9:16 pm

That is the correct sheet for a "N" model..1GE

There are no adjustable air screws. The main air jets are capped off out of sight.
There is a pilot air jet in the lower area of the filter side opening.
Last edited by 2smoke on Wed Aug 28, 2013 2:12 am, edited 1 time in total.
Colin

begbie
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Re: Carb specs

#7 Post by begbie » Tue Aug 27, 2013 9:43 pm

Ahh, many thanks.

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phildu31
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Re: Carb specs

#8 Post by phildu31 » Wed Jun 29, 2016 11:52 am

This sheet is for 47X specs.
Just remind that float height needs to be corrected at 24.

For 1GE specs :
Image
Main jet downsized from 195 to 165.
Needle jet downsized from O-0 to N-8.
Pilot air jet upsized from 1,1 to 1,4.

In fact all throttle range has been leaned in 1GE specs.

Linx
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Re: Carb specs

#9 Post by Linx » Thu Aug 24, 2017 5:03 pm

Is it best to re-jet a 47X to 1GE carb specs?
:smt006 Current Bikes
1984 47X RD500LC, 2018 Triumph Speed Triple RS, 1999 Honda CB600F Hornet
Past Bikes Include
RD250LC, RD350YPVS LC2 Race Bike, RD350F2, 1976 CB400F

silverstrom
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Re: Carb specs

#10 Post by silverstrom » Thu Aug 24, 2017 7:47 pm

I think the assumption is that 47X 165 main jets work with the 47X needle jets and 47X pilot air jets. 1GE 195 main jets work with the 1GE needle jets and 1GE pilot air jets. Check to see which pilot air jets and which needle jets you have and then main jet as required. Of course, those jetting numbers assume your engine and pipes are stock. And as Philippe mentioned, the float height for the 1GE specs was corrected to 24 mm by a Yamaha Revision. 21 mm as the manual shows is incorrect.

Linx
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Re: Carb specs

#11 Post by Linx » Fri Aug 25, 2017 10:40 am

Thanks. Should I set the float height on my 47X to 21 or 24mm?
Cheers

Sent from my HTC Desire 530 using Tapatalk
:smt006 Current Bikes
1984 47X RD500LC, 2018 Triumph Speed Triple RS, 1999 Honda CB600F Hornet
Past Bikes Include
RD250LC, RD350YPVS LC2 Race Bike, RD350F2, 1976 CB400F

silverstrom
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Re: Carb specs

#12 Post by silverstrom » Fri Aug 25, 2017 10:59 am

24 mm +/- 1.

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phildu31
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Re: Carb specs

#13 Post by phildu31 » Fri Aug 25, 2017 11:04 am

Hi.
It is 24mm.
Start with this value on the float height and adjust it with a transparent hose on bleed screw when the carbs are set on the bike.

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