Seeutek 26" or 28" 80cc Bike Bicycle Motorized 2 Stroke Cycle Motor Engine Kit Set

I bought 2 kits. I knew there were problems with all the kits and was ready for it. Engines are great and I have about 1200 miles on the one. Did have a problem with the gas tank cracking but the seller sent on right out to replace it.If you are looking to buy a kit make sure you research them first. Make sure you know what you are doing before you leave bad reviews because you don't have any skill. Can't stand reading negative reviews from people who got in over their head. Internet is a tool, use it.

Here are a couple of my suggestions when installing and trying to get the motor to start. 1) The carburetor has a white plastic thing stuck in the gas port (probably to keep dust out). You need to pull it out and discard. It's not part of the carburetor. 2) When installing the throttle cable, install one end of the cable on the plunger inside the carburetor FIRST, then attach the other end to your bike handle. The plunger has a strong spring behind it. If you attach the throttle cable to the handle first (with the handle installed on the bar), you'll be fighting the spring trying to attach the other end to the plunger. 3) I make the chain as tight as possible. You'll still be able to push down on it with your hand and get about 1/2" of play, but I found out that if the chain isn't tight enough, the chain can bind up on itself inside the motor and cause everything to come to a screeching halt. So if it's tight, it can't bind up on itself. 4) You'll have some extra nuts and bolts left over. Keep them in a bag with some screwdrivers and wrenches and take them with you when you ride. I used some blue Loktite on my nuts and bolts hoping they won't come off while I ride.When you start riding the bicycle and you release the clutch, you may think the motor has started, but it may be just the sound of the piston going up and down. If you're having a hard time getting it going and you want the satisfaction of hearing the engine start, remove the carburetor (just have it dangling and out of the way) and the little tube that connects the carb to the engine. Fill a spray bottle with the gas mixture, and spray some gas into the engine block (maybe 5 squirts, it'll look like a teaspoon of gas sitting up against the piston). Get on the bike, start pedaling, and release the clutch. The engine should fire up for a few good seconds before it cuts off while you're riding it. Now, to get it going for real. I found the gasket between the engine block and that tube that connects the carb to the engine to be a little lacking (I don't remember why, maybe a part of it was damaged). I just removed it and used some liquid gasket instead. Also, I took some Teflon tape and wrapped the other end of the tube about 3 times before I slid the carb onto it. Also, I'm finding that the bike actually starts better with the choke fully open (which is good since you don't have to reach down for it after the bike starts).

Where do I start... my son ordered this product simply for the purpose of having a fun project for the weekend and if I was to rate this kit on basis of being a FUN LEARNING PROJECT, I would give it 5 stars (or more!). It has been now 3 weeks and he is still tuning and fixing this thing daily. But he loves doing it, and he is learning a lot, so this is way better than playing video games. But on the other hand, this is a mediocre quality product. OK, the actual motor works well and even has good power, but... the instruction booklet is almost worthless (better to watch YouTube videos), the CDI (coil) burned up after 3 days of riding (and was replaced 7 days later with a free one that actually works, thanks to good customer service), all hardware was very cheap and we have replaced most of it with high strength fasteners from an industrial supply store, we custom manufactured new support bracket for the muffler (it broke in one day) and to fit the motor on a large road bike, we custom manufactured one engine mount. Perhaps a lot of issues with hardware originate from the vibrations produced by the motor. But in the end, again, the actual engine works well and my son zooms to work at a solid 33 MPH on a flat road. Plus the gas mileage is great, we are estimating 75 MPG or better, still running break-in fuel mixture.

Update: I was riding along the road about 10 km from home on my way back from work and the motor just died mid ride. I've already replaced the magneto and spark plugs and I've only ridden a total of 150km, and after checking all deals and electronics I can honestly not imagine is wrong with the engine. Changing my rating to one star, wish I could get my money back for the kit, replacement parts for piece that broke already, and for the hardware replacements for worthless junk that came with it. I loved riding it while it worked, it was a lot of fun to tinker with, but absolutely do not buy from this seller, this is complete junk.While tightening the bolts on the sprocket they stripped off, same with the bolts on the chain guide. It may as well have come without directions but its easy enough to tell how to assemble it just by looking at the parts. The engine runs fine so far but I would buy a kit from someone else, if the hardware is this low quality I'm not convinced any of the parts are going to last.