arnt all these 70cc bicycle motors the same

i know that every one is saying that they are different, but from very high quallity pics of different engines, they look exactly the same, detail to detail they are the same. whats the difference from a 160.00 job like 80cc Motor Bicycle Engine Kit Motorized Bike Gas Kits - eBay (item 270231659562 end time May-04-08 10:20:48 PDT)
and one of chris hills setups for 350.00

i know people say spark plug and sparkplug wire, but i have no problem replacing that for the 200 dollar savings. what makes it... worth it? thanks

I think the kits you are talking about could be real 80cc engines?
They come in labled designations of PK-50, 60 70 & PK-80.
I havent opened one up to measure the displacement tho... But they DO look bigger!
I will say this, I use the PK-80's & they're a lot faster than my friends engines!
They are the best deal that I've found...

Also, I don't know if chris hill does anything special to his engines?

__________________
Check out www.VeniceMotorBikes.com

From what I understand Chris takes them apart, cleans things up and I'm not too sure but I think he puts needle bearing in as well. Personally, I like the sounds of $200 delivered to your door from zoom but I'm proud of the fact that I am a cheap arshole.

so veniceboy, you have the pk80, the one that goes for 160 shipped? how do you like it and what speeds you seeing? i just can't justify the difference of price for the lack of proof that anything is different on the more expensive engines.

bbike1
Go to Chris Hills web site and read the difference. This might help you to decide.

bigjoe, what im trying to get at is what makes a difference other than "he says so..." i am in no ways doubting chris and im sure he has an excellent product, but from the veterens of motorbikes, have you seen a difference? just because one product cost more or has a couple other things upgraded, when push comes to shove, how do these "less expensive" engines ad up?

I think what you want to have is members to say "buy this one" and that is the problem you get into when sellers help to keep this place going.
I have a "kingsmotorbikes" "80cc" and have run it every single day, snow,rain, you name it. It's been a year now and all i have done is change plugs twice.
I think if you had a Chris Hill engine you would be very happy as well, he is very honest
I'm very happy with mine.
Just yesterday as I was riding her I told her that I loved her as there are days when she seems so happy
LOL..I hope that helps!

I'm sure Chris Hill's engines are very good,but at that price you get some competition.I would love to see one of these.Morini Motori
$425.00 shipped.Ron

There is a thread on this site about that kit "ran"
I can't tell whee you are from bbike but if you are in the usa, you have about 100 options.
If I could snap my fingers, I would have a 4 stroke honda Z 50cc on my bike. I would have the 3 gears as well as the auto clutch.It's nothing for them to run 10 years! Pocket bikes go for a couple of hundred and are a copy of the honda 50. It would take a bit of figuring but you would have a bike that would last years and would be nice and smooth as well as quiet.

I should have said that at the present I have a $150.00 Boygofast and it's running great aside from vibration that sets in about at the point where the motor is over revving.Sort of like a hint.Also I'm stuck on the looks of a frame mounted traditional 2 cycle.Thats just me.Image is everything you know.lol,Ron