Life expectancy of Chinese Bicycle Engines

TINKERER · #1 (**permalink**) 03-23-2008, 02:50 PM

to the veterans of motorized bicycles, How much life can I generally expect out of my "80cc" I dont plan on abusing it but I also dont plan on babying it either, It may end up being my daily Urban transportation.

deacon · #2 (**permalink**) 03-23-2008, 03:31 PM

I have no idea since i am also new to this but it seems the engines are pretty much like an old big ben alarm clock. Not very pretty and pretty sloppy mfg but they like ran forever. I doubt these will but one can hope.

**Bikeguy Joe** · #3 (**permalink**) 03-23-2008, 06:23 PM

Several thousand miles when treated with respect and proper maintenance.

**CRUISER** · #4 (**permalink**) 03-23-2008, 09:02 PM

i put over 400 miles on mine last year and still running great. two strokes have always been known to last a long time. keep it lubed and keep checking the screws and bolts and i have a good felling even with the small price for a bicycle engine kit and how cheap they are made they will last a long time

quarkdude · #5 (**permalink**) 04-25-2008, 02:35 PM

Quote:

Originally Posted by TINKERER

to the veterans of motorized bicycles, How much life can I generally expect out of my "80cc" I dont plan on abusing it but I also dont plan on babying it either, It may end up being my daily Urban transportation.

Hello Tinkerer,

I have read on other motoredbikes forums that some have gotten 6000 to 6500 miles out of a well maintained engine. Since the chinese engines have no replacable cylinder sleeves, well that means a new Jug, piston and head. But bang for the buck, thats not bad at all. I have 900 miles of hard ridden miles on mine and it is still purring.

....Thanks, quarkdude

**CRUISER** · #6 (**permalink**) 04-25-2008, 05:36 PM

i have over 700 on mine and still going strong, who knows how long they last but it has paid for itself many times over

Autocycler · #7 (**permalink**) 04-26-2008, 10:09 AM

I put around 3200 miles on my 70cc ebay kit before the wrist pin wore out. It may be worth mentioning that I put all those miles on my bike in just over 3 months. I took the engine apart and found that everything looked like a new engine inside. Replaced the rings and have a new roller bearing to replace the bushing ($20 in total). I haven't reassembled the engine yet, but suspect that it will be as good as new.

Given that the brass bushings (in the bushed engines) is relatively soft, I would consider replacing the bushing every 2000 miles as a part of general maintenance...or you can just buy a new engine

thatsdax · #8 (**permalink**) 04-26-2008, 11:37 AM

well.. For Starters, there is no such thing as an 80cc engine kit out of Asia. And..As for life.. Well..If you rag on your motor, you may get 1,000 miles, if you are nice, you may get 5000 to 6000 miles. No kidding. I know of one guy that has over 8000 miles, and he informed me the other day it is now getting tired. But. That is good miles for sure. Now..On the other Hand..The Titan 4 stroke, well... 8,000 miles is just getting that engine broken in.. But they cost twice as much.. Enjoy the ride..

**Bikeguy Joe** · #9 (**permalink**) 04-26-2008, 06:04 PM

Quote:

Originally Posted by Autocycler

Replaced the rings and have a new roller bearing to replace the bushing ($20 in total). I haven't reassembled the engine yet, but suspect that it will be as good as new.

I'd double check the bearing/bushing thing, I don't think the bearing will fit where the bushing was.

ChrisHill · #10 (**permalink**) 04-26-2008, 09:57 PM

My beater has close 8200 km's on it now...that's since last fall. The temperature range that I've subjected it to are between +28C and -45C. Still going strong, without so much as a hiccup...although I did replace my coil around the 5500 km mark. That was my own fault though...not the engines, lol.
I don't baby it at all, and I am the worst person that I've ever met for maintenance issues...there just aren't enough hours in the day to care what shape it's in as long as it gets me to work and back...sometimes thru a good 6-10 inches of snow, lol.

Take care, and ride safely.