I'll put the spare one in my car for you then. They aren't too tricky once you get into it

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Thanks a heap Tim

So with a needle change - if I did indeed need to change them.

If I changed to say, a CP6, would that mean I would need to lean out my mixture being a bigger needle? (just trying to get my head around this)

Changed the spark plugs to the BP5ES, first little run seems to run well but still dropping off whilst idling, when it idles it kinda makes a knock every so often just randomly - does it a little more when the idle really drops low -500rpm

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I wish I had some sort of witty quote in my signature

It's a number 6, not a CP6.

The diameter at the thick end (ie at idle) is about the same for all these [.090 jet size] needles. So will idle about the same without moving the jet.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Doc

So would the actual part no. be if I were to buy a 'no. 6?'?

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I wish I had some sort of witty quote in my signature

My car is 1330 with mild cam.

I just checked and my I.5s had no 6 needles. I tried a couple of different needles and they seemed the best. You can borrow them to try if you like. I'll try and bring the needles on Sunday.

If you order you just need to ask for a no.6 needle to suit a 1.5in SU carb. There are fixed and floating, yours are more likely to be fixed. Midel could help you out or you could shop around.

eg

http://classiccarbs.com.au/SU-Carburett ... 0.AUD1005-

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68 Morris Cooper S Mk1 (*ex 78 1275 LS 4th last built, 70 Morris 1500 OHC & 70 MiniMatic)

Karcraft stocks the no 6 needles, around $13 or so each.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thank you Phill + Doc,

I'm (ok)ish about giving the change of needle a go - it just makes me nervous once they're changed the effect it will have on my A/F, I've never played with A/F mixes yet and don't yet have any tools for that (considering getting one of those gunson colortune thingy's)

cheers
James

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I wish I had some sort of witty quote in my signature

Gunson's Colortune won't help you except at idle.
Find someone down there with an A/F meter or come up for a drive, I have a portable `Innovate MTX' one.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.