smoke issue  By  foxrider603 (Read 1,638 times)

typical gy6 engine uses the non iridium version, but I suggest this one.

NGK (7544) CR7HIX Iridium IX Spark Plug

Good deal. Did you happen to smell gas when you drained the oil? I would bet gas had seeped past the carburetor while sitting for 2 years and found it's way into the crankcase. I know, it has happened on my GY6 quad while sitting over winter.

Does the smoke have a blue tinge to it or is it mostly gray black? Might also be time to put three ounces of a good fuel system cleaner in it (such as Berryman B12), run it until its warm and then let it soak in over night. After a few tanks you may need to adjust the idle valve on the carb.

Also you may want to consider using some of Carol Shelby's ZMax to loosen up the rings and clean up the crankcase. About 4 ounces should do it. Be mindful that you put the ZMax in and ride immediately or it will just settle and treat the metal in the bottom of the crankcase and possibly release its reactive agent as a gas. You literally need to pour it in and start up the motor the moment the dip stick is screwed back on and then ride the bike for at least 15 minutes to get it well circulated and worked in along with the heat activating it. It is made to be absorbed into the metal which is why you need to run the engine immediately to circulate it and prevent it from soaking in all in one spot so do not get it on your skin as it will be absorbed very quickly.

A Whole Bunch of Mechanic in a Can
 RUN from Z-Max
Carol's dead as should be this crp.
Not going to have gummed up rings mumbo jumbo.
Most Likely the Cylinder Bore got Rusty from condensation. In this case there is No Mechanic in a can thats going to fix it.
Don't waste your time or money.

If you don't know you don't know. Indy drivers have been using it for years however you do have to follow directions.

I have seen it free up varnished rings and sticky valves resolving many issues with engines that have sat too long. It will not fix worn out rings or bores or bent/burnt valves however it does clean and free things up when used correctly.

I could understand if I recommended some form of putty to coat the cylinder bore and piston to restore compression instead of a micro lubricant and cleaner that can free things up so that things can work as originally designed and intended.

The last naysayer just stood there with his mouth open when the engine that he was going to have to rebuild just smoothed out and ran properly within a few minutes of our pouring a few ounces of Zmax in it and continued to do so for a good many years. It was a 16 hp pull that had been sitting on a shelf for too many years so it had a few issues with things sticking. He kept repeating that his friends said it doesn't work while standing there watching it work as the rest of us expected it to.

Most reputable parts stores along with Walmart carry it.

Air filter bud, ordered a new air filter

I have worked on and maintain small engines for many years and do know how the specified product does and does not work. The engines we use it in generally stay cleaner and have fewer problems with internal parts gumming up and sticking. Carbon on the combustion side of valve stems will not be cured such as in the case of that one in the picture you showed which was allowed to run to go way too long before addressing the issue.

For getting a stored engine that has not been used in a while freed up the product works quite well. Joe Lencki was well known for his Indy engines and his Lenkite products were even used in the aircraft industries where engines see much tougher conditions than the typical GY6 thats gotten a little sticky and needs some help to free it up.

My stuff generally runs for decades with few problems compared to that of others who scoff so I am doing some things right.