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

Since I am a newbie, could you elaborate on this info. I am not familiar with any other fourum or issues with the vendor (EPA chatter?), I appreciate it, as I am interested in buying another engine for another bike probably a 48cc... thanks
Bob

Please be sure to leave him a review in the vendor review forum.

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

There is another forum or two pertaining to motorbicycling. One can be very hostile/rude to folks for reasons unknown, especially those not in the "clique". At one point I believe they were on a psuedo crusade against any vendor not selling "EPA approved" engines/kits. That was due to one particular member who overly endorses his brand of engine kit, much to the dismay and disinformation of many.

Long story short, you aren't missing anything unless you thrive on drama queen type stuff and motorbicycling is secondary.

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

Thanks Bikeguy Joe, thanks for the info. I have no use for the drama crap, this guy has been very forthcoming with me, and I expect him to do what he says he will. And any group that thinks that a 2 stroke engine can REALLY be environmentally friendly is not too smart. The only redeeming quality about small 2 strokes is JUST that they are SMALL. Thanks for the input. I used to frequent a gunsite where the members also had the "clique" mentality, I realized that i had no tolerance for the "nonsense"....
Bob

I'm a member of 2 forums. I like this one. This forum doesn't make me feel like carp for riding a bike with a weedwacker on it. the members of the other forum tend to belittle/make fun of a lot of things. I like 4 strokes and I love my weedwackers... I used to read over there and post a lot, but wondered why afterward I felt bad after..

I still read over there but I've come to learn that there is a lot of flaming and no good useless posts by a few militant people.

A2Zonline deals started a thread as RAW and they flamed him to death.

Anyway. there's a lot of good onfo here and there, but there you have to take it with a dose of drama.

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Made in china, made better in my garage
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Don't feed the trolls!

Too bad for them.... they FAIL..... I rather like the idea of improvising the use of an engine and other equipment to do something entirely different from which it was intended... it's the American ingenuity that created this great Nation .. anyone that would belittle another for that is clearly a moron.
Too bad they flamed that a2zonline vendor.. he's been easy to deal with so far...

much nicer feel to this place
drama free !!!

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Bill (aka azbill, aka azkronic)

yesterday is history,
tomorrow is a mystery,
but today is a gift...
that's why it's called "the PRESENT"

I know this is really off the topic, but...
As far as the environmental issuses go,
I look at our 2-strokes like this...
How many miles will this engine transport a person on 1 gallon of gas compared to a normal car?
& how much crud is being put into the air from 1 gallon of gas being burned, instead of 5 or 6 gallons?

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Check out www.VeniceMotorBikes.com

As I read thru the thread and look at the photos showing the hole it seems simple to me what the problem is. I don't think it's much of a problem though with so many having it and not reporting oil leaks, high idle speeds etc because of it. It appears to be a mold that needs to be ground out further where the hole is occuring.

When the machining for the head studs is performed there isn't as much metal
on that one stud boss as there should be and the drilling cuts thru the "too thin portion" of the cylinder casting and that creates the hole. Continuing to run them in production is just poor quality control but if anyone reads some of the books on China and their industrial revolution they will understand why they are more focused on running numbers over quality. Personally I doubt the Chinese companies that manufacture these bicycle motors would worry much about this problem. The Japanese, however, would be concerned.

The suggestion to apply some liquid steel or JB Weld would be a viable solution. Still, I doubt there would ever be any problems in the usefull life span of this motor to arise because of this. If someone receives such a motor kit it would probably be a good idea to apply the JB Weld before using the engine.

I'm stating this as my opinion and how I would handle it if I were faced with the situation. But somewhere in China a machinist needs to grind a few more mm out of the mold the cylinder is cast from around the location of that one head stud. (so the drilling won't cut thru the casting thus creating that hole) The problem looks much worse than it is.

Thanks again for the input. eDJ I was going to take the advise of filling the hole with JB weld or as Macaddict suggested, some "fast steel", but I was concerned that it would stick to the stud when it hardened and then if I ever did have to take the jug off it would be "stuck" due the repair... I havent run the engine yet so, what is your feeling on that... If I did the repair, would you suggest taking the jug off to do it?.

P.S. I did get my missing parts from the vendor by priority mail 2 days later. So I would say he's shown a willingness to make sure a customer is taken care of.

Thanks.
Bob