Hey there YouTube, I'm on a bet that you've picked this video because you have a YZ250F and you're having a hard time starting it. And there's a ton of different information forms and websites out there, with all kinds of conflicting information out there. Now I'm on a mechanic for over 20 years. Obviously, if you follow the channel, you know I teach motorcycle technician program and my customer brought this in and said it had a complaint of hard starting, especially when it gets hot. So you can Google anything you find out that this is a real common problem. Number one, the owners or service manuals give me a great resource to say, do this, do this, do this and do this. Before you even worry about how these are hard to start, first off you have to have some things in order. Checklists on this. Valve clearance is good. The base line settings are good. The 2001 to 2002's use a procedure with a lever on the handlebar, kick it to top bed center, and then pull the lever, kick it a couple times and that procedure works pretty good. Well this is a 2001, but it has the 2003 decompression cam in it. And what we know about a decom cam is you should build this frickin world that thing it should fire right up. That wasn't happened for me last night. I got this thing all together. You saw me in my other videos I just did on the carb on this and air filter and electrical. And I mean it's, it was stupid. I'm going to show you a picture here in a second of the hole I put my boot, kicking this thing over so many times. So how many mechanics got a pile of these broken boots because you weren't thinking and used a regular work boot, trying to kick over a day and kick starter. Had to walk away from it. I got the next morning, did some more research and thought you know I'm just going to give that try again and make sure and do some of the recommendations. And one of those recommendations is don't touch the throttle. When we go over how to start this cold, I'm going to show you guys that the engine is completely cold. I'm going to get it fully warmed up, shut it off, and show you the heart, a hot start procedure as well. So let's just go ahead and get to it. First thing that you want to do is I'm finding don't touch the throttle. You want to touch it so bad and it just caused me to flood the engine. That's why I'm kicking it a hundred times. So if you have to even move your hand over here, some people are doing that so that they didn't accidentally while kicking operate the accelerator pump. So as long as the carburetor is full of fuel, you shouldn't have to turn your gas valve on. You can see here I got a little auxiliary tank. But I had no issues with going ahead and turning the fuel on because I have my carburetor is good to go. You got two little knobs here you're going to see this is the choke, the black one, or a fuel one rich, and maybe the proper term. You're going to go ahead and pull that. Leave this one in. There's no, if you have to do them both, there's something wrong with the carburetor. If your combination requires both, once again, there's something going on with your carb. So you pull the choke, we'll get to this one later. And then we're going to go around and I just wanted to prove that this is a completely cold engine. It's been sitting all day. You can see here. I mean room temperature. I'm going to go ahead and kick this thing like a mother and should fire right up for us. Another thing I can't stress enough, put on a good boot. This is going to be a good demonstration of how to start the YZF 250F cold. Now, once again, I don't have the lever on the handlebar. I'm going to still use that procedure even though I don't have a lever on this one, that'll help you 2001 to 2002 people out. Until I feel it get hard, let it rewrap it. And now, I want to prove here that this was a cold engine that I'm going to get to full temp to show you that when tuned right and using the procedures outlined in the manual and common to be successful in forums. This works great. Check it out. There's a couple of big pointers for you guys to wrap this up. You cannot stress enough that you need to shut your fuel valves off. Obviously, you guys on your tanks, you know, we're talking about the fuel valve there. Shut that thing off. There's absolutely no benefit. There's nothing but trouble by leaving it on. In closing, I saw numerous people that said, don't touch the throttle. I can't stress that enough. I agree with that. On this motorcycle, that is definitely the best technique. Turn the fuel on as a choice. You at least need the carburetor full of fuel, that makes sense. And then pull the black knob, the choke knob. Don't touch the throttle. On a decom cam, you don't have to. But it seems to work pretty well. You can watch me, you know, as I demonstrated in the video, doing that top dead center compression, letting it rewrap it, and then kicking it so you get a really good full stroke. And everything I didn't mention to is kick it fast. You can't kick this thing slow and be kind of soft on it. I mean, you need to get it in the right position and give a solid firm as strong as you can, good leg kick. And this thing will fire up. I mean, I've done this, you know, half dozen times trying now, because I want my customer to be educated on this too. I don't want him to go up and him or her and be struggling or fighting with it, you know, when it's really just a lack of information on technique. Keep wrenching, stay tuned, and we'll see you again soon. 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