Which Emulsion Tubes to use with Ivan's Kit

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Scbr1
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Re: Which Emulsion Tubes to use with Ivan's Kit

#46 Post by Scbr1 » Tue Aug 18, 2015 8:53 pm

Hi Blobber, looks like you been tempted with the Unifilter dilemma again lol. Think it's only worth it if you got a reasonably tuned motor otherwise stick to std air box etc. Jetting with the Unifilters is a whole new world of pain. I think you seem like a perfectionist & trying to jet with them could be the end of ya lol.
If you do get tempted by the Unifilter demon I know someone who has 2 brand new ones sitting in his garage. They taunt me every time I go in there the bastards :grin:

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Re: Which Emulsion Tubes to use with Ivan's Kit

#47 Post by rexcat » Tue Aug 18, 2015 10:52 pm

hi if its any help to you my set up is jolly moto exhaust unifilters, 1.2 air jet 22.5 pilot jet, ivens needles, the a needle on clip 3 from top and 220main jet, i enlarged the hole above the pilot jet to 1.5mm, this setup works on my bike it has shaved heads and cleaned up ports

Blobber
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Re: Which Emulsion Tubes to use with Ivan's Kit

#48 Post by Blobber » Wed Aug 19, 2015 4:53 am

Colin - the Keyster tubes are definitely bigger internal diameter than the Yamaha N-8. I know because I have some thin plastic rods, the one that just fits through the N-8 orifice is a slacker fit in the Keyster tube. Its not an exact science I know and it doesnt tell me what size the Keyster tubes are but it clearly demonstrates that one is bigger than the other. I also didnt think that Keyster state what size it is on their packaging? There is nothing stamped on mine. They certainly didnt on the ones I bought 5 or 6 years ago. Although it does say 1GE on the packet so they should be N-8.

I wish they were N-8 it would solve my problem!
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nzminis
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Re: Which Emulsion Tubes to use with Ivan's Kit

#49 Post by nzminis » Wed Aug 19, 2015 5:48 am

im sure i said it before
but i had the aftermarket tubes measured , they were bigger than the n-8 ones i have , so they are 0-o

i also contacted yambits and they got back to me and said all the ones they sell are 0-o sized
like everything cheap im sure they are all made in the same place and just send them to whoever to put there name on them

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Re: Which Emulsion Tubes to use with Ivan's Kit

#50 Post by Blobber » Wed Aug 19, 2015 5:58 am

Hi Rexcat - how did you enlarge the hole above the pilot, with a regular hand held drill and steady hand? Or, did you use something a bit more proffesional?
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Re: Which Emulsion Tubes to use with Ivan's Kit

#51 Post by Blobber » Wed Aug 19, 2015 6:19 am

Hi Steve - I think you are right re the unifilters, just one step too far for me at the moment and probably no real gain with a stock set up apart from weight saving and induction noise?
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Re: Which Emulsion Tubes to use with Ivan's Kit

#52 Post by rexcat » Wed Aug 19, 2015 5:44 pm

i used a 1.5mm bit and used a pin vise, i just twisted it with my fingers it was not hard to do

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Re: Which Emulsion Tubes to use with Ivan's Kit

#53 Post by Blobber » Thu Aug 20, 2015 5:14 am

thanks Rexcat I did wonder whether that sort of method would work.
cheers
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Re: Which Emulsion Tubes to use with Ivan's Kit

#54 Post by vma500 » Sun Aug 23, 2015 12:22 pm

sorry to say this coz this is a very interesting topic but my standard 47X nozzles are N 0-0 and also have 14 holes inside :smt017

so i thought 47X nozzles were N 0-0 and N8 1GE ,but both have 14 hole inside

just have checked this coz opened up the powerjet circuits !
my bikes :RD500 2X ,RD 350 F2 , RD 350 31K,RD350 4LO,RG500,RG250 WW,RGV250,TZR250 3MA,TZR250 3XV,NS400r,NSr250 mc21,KR1250S,

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Re: Which Emulsion Tubes to use with Ivan's Kit

#55 Post by nzminis » Mon Aug 24, 2015 1:53 am

thats right 0-o and n-8 are full holed
n-8 n-6 rzv are not

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Re: Which Emulsion Tubes to use with Ivan's Kit

#56 Post by Blobber » Sat Jan 02, 2016 7:09 am

happy new year!
Just thought I'd update this thread with my latest fiddling.

In the quest to achieve perfect carburation I've had a further fiddle over the Xmas holidays.
My set up was already very good but still in my view not quite right (I am looking for perfection - if it exists) in the transition between the pilot circuit and the needle/needle jet - first 1/8 to 1/4 of throttle.

I was running the Keyster (thought to be equivalent to O-0) emulsion tubes and the Ivan needles for standard filter set up (type A?). Remember I'd increased the pilot air jet to the largest available size which gave me the best set up. My theory is that the overly large pilot air jet was compensating the overly rich O-0 tubes.

So, I have dropped the needles down a notch, clip on second from top notch. Also put the standard pilot air jets back in #1.1. Balanced up the carbs again and WOW what a nicer crisper response from the engine! Havent tried it on the road yet due to shitty wet weather but cant wait. Engine is so smooth and quiet unbelievable for a two stroke. No clutch rattle at tickover, really nice.

One thing I also tried was doing the needle adjustments without taking the carbs off the bike or even dangling them from the bike on the throttle cables. Real easy if you are careful and far quicker in the long run. Was also surprised that the carbs needed balancing again even though I'd not taken them off, quite a bit out.

Anyway cant wait to get a dry day on the road to see what its like.

Will let you know how I get on.
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Re: Which Emulsion Tubes to use with Ivan's Kit

#57 Post by Blobber » Fri Feb 26, 2016 9:31 am

Took my bike out for a quick try after lowering Ivan's needles a notch with the keyster O-0 needle jets. As the O-0 jets are a little rich my theory is weaken it off a bit by lowering the needles a notch. Pilot air jets are #1.1 standard.

I'm very fussy with the carburation and I'd say its now probably as good as it gets, you can cruise around at low revs and it picks up great no flat spots or spluttering plus plugs nice mid brown colour - I'm well pleased.

Thanks for all those that have contributed and helped.

Time to ride and enjoy.

Might just try the pilot air #1.4 to see if any benefit as it will weaken off the initial throttle area a bit...............
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Re: Which Emulsion Tubes to use with Ivan's Kit

#58 Post by Linx » Sun Sep 10, 2017 5:22 am

Hi Blobber,
Did you ever try the 1.4s again?

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Blobber
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Re: Which Emulsion Tubes to use with Ivan's Kit

#59 Post by Blobber » Mon Sep 11, 2017 4:39 pm

Hi Linx - I have installed Ivans emulsion tubes and the bike is now sorted they are the standard 1GE tubes. With the correct tubes and Ivans needles I think that is as good as it gets and it it really nice now. I might try the 1.4 but at the moment I am pretty happy so I'm riding it
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Re: Which Emulsion Tubes to use with Ivan's Kit

#60 Post by Linx » Mon Sep 11, 2017 6:02 pm

Thanks Blobber. As I have a RD and not a RZV, I think it will be OK. I've ordered Ivan's kit. He asked me if I needed the needle jet and I said I don't know. That was it. He didn't try to sell them to me.

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: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

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