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Gezo
 Post subject: Needle size
PostPosted: Sat Feb 11, 2017 9:41 am 
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What needles should I be using for twin 1/1/2 carbs on a 1275 motor with 266 cam and mild head work?
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drmini in aust
 Post subject: Re: Needle size
PostPosted: Sat Feb 11, 2017 9:49 am 
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Location: near Baulkham Hills, NSW
CP4 or no 6.

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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. :mrgreen:
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simon k
 Post subject: Re: Needle size
PostPosted: Sat Feb 11, 2017 12:23 pm 
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Location: Wodonga - Vic/NSW border
ditto #6, mine didn't like CP4

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Gezo
 Post subject: Re: Needle size
PostPosted: Sat Feb 11, 2017 3:34 pm 
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Thanks guys. I' ll see what mine are and swap them out to CP 4 if there not.
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carbon
 Post subject: Re: Needle size
PostPosted: Sun Feb 12, 2017 1:15 am 
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Also worth checking what dashpot springs you have fitted, blue will likely work best with this spec.

If you try red springs be aware that recent replacements can be much stronger than originals.
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Gezo
 Post subject: Re: Needle size
PostPosted: Sat Feb 18, 2017 11:45 am 
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Where do you buy the CP6 needle?
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drmini in aust
 Post subject: Re: Needle size
PostPosted: Sat Feb 18, 2017 11:51 am 
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Gezo wrote:
Where do you buy the CP6 needle?

It is not a CP6, it is a `6'.
:wink:
Can buy from SU Midel in Sydney.

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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. :mrgreen:
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Gezo
 Post subject: Re: Needle size
PostPosted: Sat Feb 18, 2017 12:02 pm 
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Thanks . Has anyone heard of a OP4 needle?
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outbackmini
 Post subject: Re: Needle size
PostPosted: Sat Feb 18, 2017 4:11 pm 
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Joined: Mon Aug 01, 2016 4:35 pm
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Location: Port Augusta SA
My 850 is nearly finished but has no power...I bought a new 1.25 twin right handed by mistake - so bought the left never intending to use them together but hey, what a waste???

so, I think it MAY be mismatched needles as I suppose the left is sold intending to be used solo but the right would normally be jetted for twins...unless you buy them as a pair.

If that is the problem then new jets may help.

Can anyone suggest needles for a bog standard 37000 mile 850 with twin 1.25s?

Dashpot springs?

Where can I buy them? Minisport don't seem to sell needles.
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goodie
 Post subject: Re: Needle size
PostPosted: Sat Feb 18, 2017 6:09 pm 
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Location: Muswellbrook -- NSW
outbackmini wrote:
My 850 is nearly finished
Can anyone suggest needles for a bog standard 37000 mile 850 with twin 1.25s? Dashpot springs?

Where can I buy them? Minisport don't seem to sell needles.



Try here , http://www.sumidel.com/contact_us.html
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drmini in aust
 Post subject: Re: Needle size
PostPosted: Sat Feb 18, 2017 6:29 pm 
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Gezo wrote:
Thanks . Has anyone heard of a OP4 needle?

Can't see any OP listed on mintylamb, most likely its a CP4.

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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. :mrgreen:
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Gezo
 Post subject: Re: Needle size
PostPosted: Sat Feb 18, 2017 7:18 pm 
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Definitely stamped 0P4 , I reckon it is a CP4, as well Going to try some 6 needles ad it has a small flat spot down low.
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