HIAORS80cc Motorized Bike CDI Ignition Coil Magneto Coil Spark Plug Kit for 50cc 49cc 2 Stroke Engine PK80 BT80 YD100 Bicycle Motor Motorcycle High Performance Replacement Parts

You can definitely tell the power difference. It works very well. I've had it on the bike for a good couple of years now and I run it hard. It still works great.

Great quality wiring would be tricky for a beginner I think it was all the blackes together on one lead and the rest together on a separate lead but the others aren't all the same color but great quality very impressed

So far working as it should.

One of our CDI boxes failed after 2 months. This replacement works fine.

Personally, I was expecting a big improvement on power and the way my bike runs. But it is the same as stock.

Payed for a new plug as well and the plug that was given with the purchase was no good

Don't know how good it works have not installed it yet

This set works very well

Bike starts and runs better thanks

Ordered this for my gas bike and it has been running flawlessly. Would highly recommend

Works great, gives a nice strong spark, but the included spark plug is very cheap and should be upgraded.

With the stock setup it was a 15min + routine to get it started, gaping the plug constantly etc. Now, with a couple clutch bumps it fires right up. No choke even required. Over a week now of easy starts. The hotter plug makes a difference too it seems. Mind that red plug wire tho, it's not very heat resistant like normal plug wires are. It'll melt against the head (probably).

Spark for engine.