Brand new engine has hole in cylinder near stud. :(

I Would Just Run It. It Seals With The Head And Base Gasket.

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NEVER BEAT ON IT, GET A BIGGER HAMMER

would the jb weld or fast steel stick to the stud? thereby making it diffucult or impossible to slide the jug off the studs?

The only thing I see is maybe dirt or Water getting in and going to the bottom end. J.B. weld and silver paint should do the trick! Your the 2nd member that did not get a rear sprocket. It may be drug testing time for Ebay? I know, It ain't funny

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If I were looking to repair this I'd first pull the head and look down the stud to see if there is any gap at all between the stud and the bore. If there is some room then it would be possible to slip a thin piece of gasket or paper card stock wrapped around the stud down to where you can see it thru the hole. The best way would be to pull the cylinder off off the engine and pack the stud bore where the hole has the best backing before applying the JB Weld to
build up that thin area. But that's a piece of work for a novice. Consider the buyer expects rightfully to receive a motor kit that is free from flaws such as this one.

At that point there is a backing to the hole that the JB Weld or Liquid Steel could be applied to and the gasket serve as a barrier between the cylinder and the stud itself. The gasket material could be left in place until such time as the cylinder is pulled for honing for new ring(s). By that time the gasket material may only be ashes.

As has been pointed out water or condensation entering thru the hole in that area could lead to a build up of rust or corrosion and create a condition that would make it difficult to pull the jug when the maintenance interval comes.

I think this issue should be posted far and wide so those producing these cylinders will make the necessary changes to the molds. If the word gets out
and sales slow on this motor kit then that will motovate the corrective measures faster than anything. If this was a complete motor vehicle from China there would be a recall.

Bravo, DJ! I agree completly! All tho these motors are not really expensive they are a lot of money. If I were to repair it I would use a grinding wheel on a hand held grinder and remove the cast until square. Bend some steel to match the cast and fill with J.B. Weld, paint and reassemble. If we permit them to sell us a bad product it will just get worse. If we say nothing they assume we don't care!

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No matter where you go, or what you do, there Ya' are!

A mentor once told me, "Action ignored is action accepted." Everyone make sure that from who ever you purchase from, inspect it and then leave a feed back for all to see. Vendors will be forced to take a closer look at their products if reviews are hurting sales.

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There is no moment like the now moment.

I think that the bad feedback thing will hurt sales very little, as evidenced by people continuing to buy from ebay sellers with poor feedback.

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If it ain't broke, and you mess with it long enough, it will be.

Plus the fact that no one would even know that hole was there is someone didn't mention it to them.......

If they (chinese) start fixing inferior castings, then they are going to have to fix everything else on the China In-Frame kits until it's a Honda and cost as much.

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If it ain't broke, and you mess with it long enough, it will be.

Thanks for the excellent suggestions. I went ahead and applied a little JB weld to the hole. Based on the fact that a few other guys have the same hole and even in the same place with no ill effects, I figured it shouldn't affect the engine adversly. Now I just have to wait for a little cooler temps to install on my "cruiser" bike. I think I will appreciate the coaster brake, it will eliminate the extra cables, and "mechanicals" of hand brakes, real simple throttle, clutch, and GOoooooooo..

As a final thought on this, I once knew this guy who was building up a motorcycle junk yard. I met him when he was talking to a mechanic buddy of mine at a dealership and they were talking about the market and business of used bike parts.

I remember him taking about the nature of the different riders. I'm sure the Chinese may see things similar to his views as well. He said, "I'd rather sell used parts to guys with street & road bikes who take care of them cause they want things right and will pay to keep their rides up and in good working condition". "Dirt bike riders are the worst........when they are riding in the woods and something breaks down they'll slap anything on it that will get them running again and care less". He went on to say they would use a part of a Jeep it they thought it would work. But his view of dirt bikes was....."what the hey........they are just destroying them while having their fun". And not really want to put any money back into them.

Perhaps the Asian manufactures have already figured.....hey what the heck....these are just going to be used by boys and the life span of them
will probably just be a summer or two till they trash them and get a car. Then they'll forget all about their bicycles.....and the bike passed on to the scrap heap. (how readily available are repair parts for these ?) Some of us are familiar with the term, "Dynamic Oblescence".

I've been quite impressed at the effort and "love" so many I'm among on this board put into their rides. I'm left wondering if those in China are actually aware of it.....or it's only a production oriented view they have that translates into money for them. Consider the many short comings of these things we discuss here and how people purchase these without express warrenties.....and even anticipate major tear downs and overhauls to keep them running.

I would hope the Chinese manufacturers would at least repair the mold for the
cylinder if only for the sake of the after-market here. That is, assuming these kits with holes in the cylinders weren't something sold "off market" for cheap to a jobber who saw a quick buck selling them on eBay as they didn't pass quality control back in China. But time will tell on these cylinders.