Hi all. So I am just curious if anyone would happen to know the thread pitch for an OK Cub 049 engine. It has only the triangular radial mount and no beam mounting capabilities, in case this makes a difference to identify it. I am getting one and it is missing the needle and after hearing about the needles, I was thinking I could make one. Thank you.

I can confirm that for the .074 the needle threads on the outside of the spraybar.

Looks just like this one, which might just be your other option  

http://www.ebay.com/itm/OK-Cub-needle-valve-1-1-4-long-for-039-to-19-control-line-engines-new-READ-/391628791546

Several of them on ebay.

http://www.ebay.com/itm/OK-Cub-needle-valve-3-4-long-new-for-049-to-19-control-line-engines-READ-/272457037079

You could still make one, it is two piece. The aluminum part threads over the spray bar and has a slot in it so it can be squeezed a bit so it does not move.
The steel needle is pressed into the centre.

Why not go straight to the source?  http://okengines.com/main.shtml    (And YES, they are still in business.)

Thanks. I just went to their website. I was very surprised as I had heard they were closing their doors in December 2015. Anyway, I requested a catalogue then saw shipping to the US was $9, and elsewhere was a flat rate $20! Anyways, I posted a question and will wait to hear back from them.

I really don't know how a remote needle would work on a small engine but it you try it Horizon Hobby has a nice one cheap.  I have a couple of the 36 ones and they are nicely made and all metal. If you have a hobby shop near you they should be able to order it for you if you wish.
 http://www.horizonhobby.com/SearchDisplay?searchTerm=evolution+needle+valve&categoryId=&storeId=10151&catalogId=10051&langId=-1&pageSize=40&beginIndex=0&sType=SimpleSearch&resultCatEntryType=2&searchTermScope=2&showResultsPage=true&searchSource=Q&pageView=

   If you have any old OS carburetors laying around, you can unscrew the needle valve assembly from the carb and use it as a remote needle. I have done this many times when my son was young and learning to start his own engines and set his own needles. It's pretty small and light, has 4mm threads if you need to drill and tap anything to mount it on, and the needle seal a LOT better than any of the O-ring type needles out there. When I go to swap meets and look for old R/C engines to convert for stunt, I look for the older OS engines and/or loose carbs that might be broken but have good needles on them. Tower used to still have the needle assemblies in stock but I haven't looked in a while.
  Type at you later,
     Dan McEntee