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Logan Fry

2008 TTR 230 Serious Jetting/Carb Question.

5 posts in this topic

I Have a 2008 TTR 230 and the stock jetting absolutly sucks, it constantly pops out the exhaust and sometimes fully backfires a loud boom (only happened 2 times) but now i have purchased a FMF PowerCore IV exhaust and now am looking for a jet kit on ebay since i cannot find any on known dirtbike websites (motosport, Rocky mtn, etc) I Have found 1 jet kit specifically for the 2008 TTR 230 and it has the option to call and get it custom ordered for your bike. But before i fork out 50 bucks for that i want to know what jettings i should get/look for. Please dont just reply witha copied and pasted link, i need actual helpful information for the TTR 230.

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I would find out what the stock sizes are, either by removing yours or looking in the service manual. Then I would get the next few sizes up (every other digit ex. 138, 140, 142) for the pilot and main. If your needle doesn't have clip positions then I guess the kit wouldn't be too much of a waste of money cause it'll come with a new needle that will have clip positions and probably a different profile on the business end, but if it does, I would just buy the jets individually.

Oh, don't forget to get a less restrictive air filter and take the cover off under the seat, this will change your jetting too

Edited by goosey

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The work has already been done for you. Look in the TTR stickies.

Replace the stock 35 pilot with a 38. It has a Yamaha part number, and is easy to find. Put a 130 main in to replace the stock 125. Open up the top of the airbox. Turn your fuel screw out to 2.0 turns. It will run like a new bike for less than $15.

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The work has already been done for you. Look in the TTR stickies.

Replace the stock 35 pilot with a 38. It has a Yamaha part number, and is easy to find. Put a 130 main in to replace the stock 125. Open up the top of the airbox. Turn your fuel screw out to 2.0 turns. It will run like a new bike for less than $15.

Where do you find those jets? Yamaha used a carb called TK(Teikei) and does not carry any jets other than the factory sizes.

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