MC18 R2J needle/needleholder alternatives

**Fri Oct 23, 2009 10:33 am » Post: #1 » Download Post**

So we all know that the fast wearing needles for this one, are out of production...(Just recently got word of this Very Happy

)

Question is what else can be used that is readily available?

I have some from a 21 HRC kit. Maybe they can be put to good use?

(Rebuilding an 18 is not for the faint of heart guys. I 'm having nightmares, a 1000 voices whispering "discontinued" ) Laughing

**Fri Oct 23, 2009 12:48 pm » Post: #2 » Download Post**

You can use MC21 HRC needles, although the profiles aren't perfect for the R2J. You will need the HRC emulsion tubes too, and the HRC needle holders.

Quite how you'll get on with the air correction is another matter. It will probably take a lot of fiddling to get it to run cleanly from idle to redline.
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**Fri Oct 23, 2009 3:34 pm » Post: #3 » Download Post**

Is it safe to guess, that known MJ sizes will not work with HRC needles, on the specific carbs?

I need to start from somewhere .(jettingwise)

Deeper searches in the sea of Japanese NSR blogs, show that 16012-KV3-305 are compatible. If they save me the risk of a seized bike, I may invest in a set.

**Fri Oct 23, 2009 9:20 pm » Post: #4 » Download Post**

Stupid question, but why not change over the carbs to MC21's?

**Fri Oct 23, 2009 9:52 pm » Post: #5 » Download Post**

Not a stupid question at all. Answer is, I'm trying to keep it as original as possible.

**Sat Oct 24, 2009 5:40 am » Post: #6 » Download Post**

There is another alternative here - http://www.kenso-bakudan.co.jp/parts/bakudan/stage2/h50-250on.html dont know what there like.
i have a mc18 running hrc needles and emulsion tubes runs good with them . i may have spare needles and holders soon but you need emulsion tubes to run them.

**Sat Oct 24, 2009 7:47 am » Post: #7 » Download Post**

Dexter i think the link that provide Nsrdownunder is great... Even you don't find the original needles you can use those from the Japan site... Looks great...!!! I may even buy some for my MC28 to test them.... If i find the time of cource... Crying or Very sad

**Sat Oct 24, 2009 9:22 am » Post: #8 » Download Post**

Thanks downunder. Seems like a good alternative.
Correct me if I m wrong but the kit doesn't seem to offer needleholders. Am I to use the existing ones?
I thought that needle and needleholder must always be used as a pair, something like sprockets and chain...

**Sat Oct 24, 2009 9:26 am » Post: #9 » Download Post**

Dexter i think these needles are suposed to be used with the stock needle holder and not the HRC one...

**Sat Oct 24, 2009 9:28 am » Post: #10 » Download Post**

let us know if you get some coz my 18 could probably do with new needles!