geof.phillips@comcast.net Posted September 5, 2018 Report Share Posted September 5, 2018 I have a Teikie carburator which I am positive is the stock carburetor as I bought the bike new. It is black. I would like to locate a carb rebuild kit or if not available locate an original carb but need to know the internals are good as if I can't find parts it would be a problem. For some reason the guy who rebuilt mine lost the needle valve Anu ideas would be helpfull Geof Phillips Quote Link to comment Share on other sites More sharing options...
tony27 Posted September 5, 2018 Report Share Posted September 5, 2018 You have the standard carb, parts aren't as easy to find as they are for the later mikuni carbs EBay is probably your best chance for finding what you need Quote Link to comment Share on other sites More sharing options...
geof.phillips@comcast.net Posted September 5, 2018 Author Report Share Posted September 5, 2018 Thanks so much All I could find were parts for a 28mm whereas mine is a 26mm The used carbs are junk on ebay Would I be smart to change out to a new Mikuni Would it change the value of the bike as it is in perfect condition Quote Link to comment Share on other sites More sharing options...
guy53 Posted September 5, 2018 Report Share Posted September 5, 2018 I've owned a few A model and tried to replace the Teikie with a VM Mikuni. I never had the exact result I was expecting. If you change, look at the OKO, I've only read good thing about them. Guy Quote Link to comment Share on other sites More sharing options...
johnnyjazz Posted September 6, 2018 Report Share Posted September 6, 2018 (edited) hola, im a beginner at this stuff, so please take my suggestion as such. but from the fantastic info on this site i replaced my original 74 tk carby with an OKO. it runs awesome!!! the cost of replacing parts for the original was getting out of hand and it was still running rich., i got mine off eebs from mid atlantic trials who were great to deal with. it seems a perfect fit (to me anyway) and for a $115 cant go wrong. (i just put the original TK in a box for if and when i sell the bike). hope that helps! best, johnny here is the link.. https://www.ebay.com/itm/Yamaha-TY-250-OKO-Carburetor-Kit/113198094760?hash=item1a5b21d9a8:g:YVsAAOSwlsda9fDS Edited September 6, 2018 by johnnyjazz 4 Quote Link to comment Share on other sites More sharing options...
geof.phillips@comcast.net Posted September 6, 2018 Author Report Share Posted September 6, 2018 Hey Johnny Thanks so much. Sounds like this will be the way to go. Are you using the 26mm or the 28mm. The pictures you sent show the stock which is exactly like mine which I believe is 26mm. The OKO looks like a 28mm Do you recommend the 28mm vs. the stock 26mm I live at about 6500 ft Also can I get jets so I can jet for altitude Cheers Geof Quote Link to comment Share on other sites More sharing options...
johnnyjazz Posted September 7, 2018 Report Share Posted September 7, 2018 (edited) Geof, mine is the 26mm OKO .im still learning about jetting, so im sure some others are way more savvy than me to your question re altitude issues , but i do know that mid atlantic trials has great customer service and will help you get it running right. mine worked fine straight out the box here in NY and did come with spare jets and extensive instructions on set up, but im sure they will provide you with everything you need if its something special. but man, i nearly dropped $75 on a new slide alone for an original TK oem...ouch. but feetupfun steered me to the OKO and i read on here from a wise elder of the trials tribe that a new carby on a 44 yr old bike is never a bad thing! and the OKO is crispy clean with a D slide rather than a round one and the peace of mind everything is new and fresh is worth a lot! Edited September 7, 2018 by johnnyjazz Quote Link to comment Share on other sites More sharing options...
geof.phillips@comcast.net Posted September 9, 2018 Author Report Share Posted September 9, 2018 Johnny Thanks for the lead. Roger was great and ordered the 26mm. He is a super help and nice guy and jetting for me and sending extra jets as well Cheers Geof 1 Quote Link to comment Share on other sites More sharing options...
geof.phillips@comcast.net Posted September 9, 2018 Author Report Share Posted September 9, 2018 On 9/5/2018 at 4:51 PM, tony27 said: You have the standard carb, parts aren't as easy to find as they are for the later mikuni carbs EBay is probably your best chance for finding what you need Thanks so much I have ordered a a 26mm OKO from Trans Atlantic. They are super to deal with and knowledgeable 3 Quote Link to comment Share on other sites More sharing options...
tony27 Posted September 11, 2018 Report Share Posted September 11, 2018 When I get in to sorting my C out fully I'll probably order a 28mm from mid atlantic trials as well, I have extensive mods to the airbox & a WES muffler so it definitely fits what they say is required to run the bigger carb. They are certainly well priced & now that new airbox to carb tubes are available stretching to fit the larger carb is not so worrying 1 Quote Link to comment Share on other sites More sharing options...
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