hammerhead gy6 problems

[BuggyMaster]

Looking at your vid, it looks like it is running fine. Roll with it. I would pull the plug on it and see how it looks. If it is really dark, like almost black, you are running rich.

There is a point in which the buggy will start running like crap from being too rich. Your's is not there per your vids. If you do find that your running too rich via reading the plug, what you have to gain is a little power. Running richer has the advantage of giving you a little extra engine protection at the cost of losing a little power. If you get just the right air fuel mixture, you will be running at ultimate power. Can't really say where you are at until you see what the plug looks like.

I don't think you are running so rich that you'll wash the rings out. It looks to be running pretty good.

[SYCARMS]

Your buggy come with a 110 to 114 jet installed in the stock engine. this jet tends to run on the lean side of the spectrum, so with everything being stock it should run fine. Being that the factory sets the air fuel mix to the lean side of the spectrum, lets just say your carb has a 110 jet. You can increase 1 to 2 sizes up to bring it a bit richer and still be in the spectrum. By spectrum I mean the areas of acceptable lean or rich. so being your at the lean side you would replace your stock 110 jet with a 112 or 114 and still be within the acceptable spectrum. With the 135 jet on the stock engine you should be way above the acceptable spectrum which means you are running rich. If I were to take a stock GY6 motor and gut the exhaust and add a UNI filter I would rejet to a 123 jet at the most. What I said in the last post is this. Your buggy being totally stock the jet supplied with the new carburetor should be sufficient, and if you do not run good than you have another problem and it is likely to be a vacume leak.If the engine runs fine with the stock jet , than you would check the plug as described in the last post and if the plug is light tan you can increase the jet size 1-2 sizes to bring the plug into the brown color. This will give you the optimum performance providing all else is right. There is no way I can know all the specifics with your buggy since I do not have it in front of me. All I can tell you is what is known as far as specs go as to what is and is not correct. The 135 jet is deffinately to big for your application and if the engine runs fine its likely that whom ever owned it last had a vacume leak and compansated with a larger jet. If I had the buggy in my posession I would put the carburetor on with the supplied jet and if it did not run correctly I would find the cause and repair it. TOM