I have a new TB400 with about 15 hours on it. Today, when I went to go ride it, the thing would just lay down and die whenever I nailed the throttle or gave it a decent amount of gas. It would not stall, but would not start running ok again until I let off and let it idle down. I checked the plug and it had a lot of greyish-black deposits on it which I attribute to me pre-mixing the first couple tanks of gas b/c I didn't think the oil injection was working. I cleaned the plug and put it back in, but it still runs the same. I'm going away next week to go riding so i dont want to have to put the machine in the shop and risk not having it back in time. Please help!!!

 

well yu gotta give it alot of choke and if it doesnt work still give it gas while starting it and did you breakit in correctly by not putting oil in it with your first tank? of gas

 

The dealer put in the first tank of gas so I dunno if it was mixed or not. Owners manual said to mix first tank or two. The problem is occuring once the bike is all warmed up, not with the choke on.

 

it probably best if you take it in to your dealer and stop messing with it for a while or just let it sit for a while and try again
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That is the whole point of my post. I don't want to take it to the dealer unless absolutely necessary b/c I need to have it back by next wed.

 

let it sit for a day or two and try again

 

Try a new plug and see if it helps any.

 

Try the new plug but it sounds like your mainjet is plugged, remove the plug at the bottom of the carb bowl and then the jet. If it has dirt or something else in it you would be wise to remove the carb and clean it thoroughly.

 

Check for a plugged air filter

 

you canot clean a ngk plug when fouled .try replacing with new BR8ES