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post #1 of 5 (permalink) Old 3-18-2019, 7:37 AM Thread Starter
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carb needles

hi guy's. anyone got a needle chart that includes the dimensions for the N36N needle. I need the info for a project I'm doing.
looked at loads of needle charts but none have the code and sizes of this needle.

thanks.
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post #2 of 5 (permalink) Old 3-18-2019, 11:09 AM
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I can't remember ever seeing fixed, OEM type needles "charted". As these fixed type are (were) used in emissions controlled markets, I'm not sure Mikuni would support swapping as enabling emissions tampering may not be in their corporate or legal best interests.

Adjustable, yes of course. With the aid of Mikuni USA or UK....if anyone can guide you to a dimensional starting point for an adjustable equivalent...they can. Will they? Dunno.

here's a initial contact link for tech help http://www.mikuni.co.jp/e/contact/

Don't be surprised if they refer your inquiry to a distributor or dealer..in which case www.sudco.com (in USA)

If experimenting, why not play with Factory Pro or Dynojet adjustables ? Between their multiple positions and a handful of mains....? They've already done their homework and established their own "starting points".

“Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba....” quote Hunter S Thompson

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Last edited by ducatiman; 3-18-2019 at 11:59 AM.
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post #3 of 5 (permalink) Old 3-18-2019, 5:59 PM Thread Starter
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hi thanks Gordon, yes I got the feeling that may be the case lots of info on adjustable ones but not the fixed position ones.


basically and a very short explanation the other week I picked up a job lot of old stock carbs from a auto jumble in a box. in there on inspection was a set of 34mm ACR carbs. a selection of Amal's and some flat and round slide Mikuni's plus a folder containing dozens of mixed needles, jets, gaskets ect. my intention is to recreate or mimic the settings of different carbs on the EX using as near stock settings as possible to see what gives. now we all know the CVK's work very well in stock form. so as a project the goal is to find out the difference the carb design makes given that all the settings are the same.


jets, needle jets and other stuff is easy to mimic given we know the sizes. but the profile and size of the stock N36N is somewhat of a mystery once the sizes are found there are plenty of adjustable ones that can be used. this is a project and experiment nothing else all it is going to take is time and money neither of which is an issue.


as a last resort given the info is difficult to obtain it may be a case of whipping out the needles on the gen 1 and measuring them.
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post #4 of 5 (permalink) Old 3-18-2019, 6:06 PM
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I forgot to add this statement from Keihin USA:

"Products and technical support for components that come as original equipment on vehicles is available from the product dealer or manufacturer. Unfortunately, Keihin is not able to respond directly to requests of this type for support."

I do believe you're gonna be on your own devices here.

remember...Clean Carbs Matter

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Last edited by Custom Carb Service; 3-18-2019 at 6:09 PM.
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post #5 of 5 (permalink) Old 3-18-2019, 9:03 PM Thread Starter
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yeah that's pretty much as expected but I'm no stranger to that scenario.
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