TTR50 help

Pull the carb and clean all of the oil out. Clean the filter and air boot. Get the oil out of everything and go from there. Was the bike ridden a lot before you bought it?

If you look at the crank case breather vent at the back of the engine, it is plumbed into the air box. Thank the EPA for that brilliant move.

Once the bike is dropped, the crank case oil dumps directly into the air box, oiling down everything. I had one of those TTR's, but sold it. My next move was to get a small breather filter, and disconnect the vent from the air box. Clamp the filter to the vent line, and secure it to the frame. Get a vacuum cap /plug to cover the opening left in the air box.

Then it won't dump oil into the air box, just into the vent filter on the tube, which is much easier to clean.

Your bike is probably smoking because it has an accumulation of oil in the box / intake area. Going to have to remove the box and clean everything thoroughly, re- service the filter. Last time mine was dropped, even after a clean up, it smoked for about 10 minutes, until the residual oil all burned away.

Better check the oil level before your ride it.

Those things are a pain in the ass to work on, as far as the carb, airbox areas are concerned.

Same thing on my daughter's TTR110. She dropped it on an incline and it rested upside-down for a while. It smoked for half an hour after that.

My kid has one as well and I found the same issue, oil in the airbox. I tore it apart and cleaned everything. I also pulled the crankcase vent hose off and routed it down behind the engine then plugged the hole for it on the airbox.

If it's still not running/idling well, drill out the plug covering the air screw so it can be adjusted. I couldn't keep this bike idling to save my life and it had a bog off bottom until the engine was really hot. Found that the put a plug over the air screw for some odd reason. Drilled it out and adjusted, bike has run perfectly ever since.

The plug is more EPA keeping your bike running crappy. Mine was very easy to remove. Once the drill bit bites, you can basically wiggle the bit ,and the plug pulls right out. I went round and round with the no idle, 20 minute warm ups.

Found a GYT jet kit for it. I only used the one step richer pilot jet, with the air screw plug removed. Instead of grinding on the starter for what seemed like eternity, with a bit of richness added to the low speed circuit, it would fire right up, and actually idle.

My only complaint was how stiff the shifting was.

I had one ttr50, it soured me on those three letters. The gytr bore kit made it scream but it never shifted anything like as good as a crf and the electeic start was a complete joke.

Save yourself some yeadaches and buy a Honda.