Mc28 Jet Replacement/Removal

**Sun Jan 11, 2009 10:13 pm » Post: #1 » Download Post**

Hi People
I'm struggling with the fitting of my HRC jet Kit. Mainly the replacing of the needles as there so different to the 21's im use to. I've got it to the stage of getting the slide/needle removed but cant get my head around getting the needle out.
thanks

**Sun Jan 11, 2009 10:16 pm » Post: #2 » Download Post**

The needle is held in with a little white clip. You need a very thin phillips screw driver. A quarter of a turn anti-clockwise and alittle pressure should release the plastic clip and then allow the needle to be removed. The white plastic clip is retained on top of the needle by a spring.
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If I have to take the carbs off once more...

**Sun Jan 11, 2009 10:28 pm » Post: #3 » Download Post**

Cheers Stephen
is the white clip your refering to the star shaped piece you can see on top of the Slide with what looks like a Hex key Pattern in the middle??
THanks Glad to have you back.
Anthony

**Sun Jan 11, 2009 10:30 pm » Post: #4 » Download Post**

Yes thats it, press lightly down on it while you turn it anti clockwise. You'll feel it release. You can then just push the needle up with the clip retained on top.
_________________
If I have to take the carbs off once more...

**Sun Jan 11, 2009 10:40 pm » Post: #5 » Download Post**

Done !!!
Thanks Heaps Stephen your a Diamond of a bloke.
No i'll try an Figure the rest out Surprised

**Sun Jan 11, 2009 11:20 pm » Post: #6 » Download Post**

He's only lulling you MC28 boys into a false sense of security... watch him! Wink

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Andy.
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**Sun Jan 11, 2009 11:27 pm » Post: #7 » Download Post**

it's only the carbs that are 28..... thank god.
The rest is pure 21 Twisted Evil

Another thing when putting in the new needles do i retain the washer that was under the standard needle??
Thanks

**Sun Jan 11, 2009 11:33 pm » Post: #8 » Download Post**

Whaaaaaaaaaaaaaaat?! What were you thinking?! Laughing

I can only assume you could only find an MC28 HRC kit and not an MC21 kit? No sane person would fit MC28 parts to a 21, surely?! Very Happy

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Andy.
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**Sun Jan 11, 2009 11:39 pm » Post: #9 » Download Post**

Yep thats exactly why I'm using 28 Carbs Embarassed

**Mon Jan 12, 2009 3:38 am » Post: #10 » Download Post**

Yet Another Question, Ont the base setting guide for 28 carbs for the needles it state's
JN - j8yb 2.765-3.0~4.0 WTF
My needles say things like A25 a/b/c
can anyone help me with this,
an also do I count the clip position from the top or bottom.
Thank you guy's

**Mon Jan 12, 2009 4:08 am » Post: #11 » Download Post**

Not that I could be of any help, but the 3rd clip position (middle) works out to be just under 4mm from the clip to the top of the needle. Just a guess.

Martin

**Mon Jan 12, 2009 10:22 am » Post: #12 » Download Post**

Hell yeah!

If I had known he was fitting them to a '21 I'd have kept my mouth shut. lol

Clip postion #1 though is at the top of the needle.
_________________
If I have to take the carbs off once more...

**Mon Jan 12, 2009 7:12 pm » Post: #13 » Download Post**

The best needles to use are the ones in the stock HRC kit. These are J8Y(a), (b) or (c)

Have you ever tried to run avgas needles on pump unleaded?

It brings a new meanings to rich!
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If I have to take the carbs off once more...

**Mon Jan 12, 2009 7:23 pm » Post: #14 » Download Post**

A25 needles are the later needles to be used with the 030 card.

HRC base settings are noticeably richer with them, and staggered conventionally.
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Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

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**Mon Jan 12, 2009 7:42 pm » Post: #15 » Download Post**

So I Should be using the B Needle's as per base setting an wat clip??
Or should I just use the standard ones for the minute till it get's a spin on the dyno??
Cheers