Probably jetted a bit on the lean side or something. My sister had a 50cc Chinese quad when she was young, biggest problem for that machine was lack of power, and super hard to start (cold blooded). I think with the right upgrades and fixing some casting, porting etc they can probably run pretty well. I've heard the Lifan Chinese engines are built pretty well, the biggest problem seems to be from power output, they might be a copy of a Honda engine, but the power output is less. Mid to high rpm seems fine, just doesn't come back down to idle too great, one way it keeps a higher idle and acts lean, other way it seems to load up and eventually stalls, I'm talking like 1/2 turn either way from where it's at, so touchy. The main issue with the machine was the voltage regulator was shorting out and blowing the 20 amp main fuse and it's been sitting so long the float seems to be having issues, I cleaned out the carb but it seems like it's not getting gas yet, bought a replacement carb for like $8 and after a lot of tuning I got it running ok, seems like the pilot jet is a bit lean, probably should throw a new NGK plug in it and do a plug check at low rpm. I think the machine was like a 2008, so getting pretty old.
Brakes are horrible on that machine, the rotors are way too small, I can't even lock up the tires, and they expect a kid to stop the machine (front is cable which actually works the best, rear is hydraulic). I think it's pretty under powered for a 125cc, but then again it only has 1 gear and was intended for little kids.
Besides all that, it seems to work alright. I just worked on a 125cc china quad (TaoTao brand) for a friend, plastics are pretty brittle, wiring is ok but the bullet terminals don't lock together very well, ignition coil has the harness soldered to it with some heat shrink over it, and the spark plug cap is shorting to the head when I rev the engine (something like a 10mm gap which means it has a strong spark). I guess the Chinese gov uses some of their engines in some of their military vehicles based on their website. The brand I looked up is a multi million dollar company, not just a tiny no name company. Even china quality, as long as things are copied pretty well it shouldn't be too bad, but it kind of depends just how good of a clone it is. So there's a china clone for the atc70 engine bolt pattern, and the 200x/200 series, now we need a nice clone of the 350x engine and a clone of the 250r power plant.
If I had a 200x around yet, I'd probably concider buying the top end from the china clone and trying it out. Not exactly my cup of tea (i'd rather buy the actual CRF230 engine), but an more info on these engines would be helpful for other's looking to maybe use the engine.īased on the CRF wire diagram I have, the ignition system is very similar to the 200x, uses the old school kill switch design and such (off = ignition wire shorted to ground). Seems like an affordable way to power a spare 200x frame. They never use real specs or exact fitments, just generic like Chinese motorcycle 250cc. Supporting harness and electrical is stupid cheap direct from China, but it's kind of good luck figuring out which parts are right for the engine. I probably should mention that price on ebay might be a bit on the high side, I saw the whole motorcycle for sale for around $900 on those Chinese selling sites, so I'd think the engine would be around $500 or less from the right source.
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