Some mechcanical and electrical ability is required, internet research will help with lack of instructions. I was able to install and works fine. Will be a big improvement in starting since I'm over 70. Parts and seller were great (Chinese packing was not very good lucky all parts arrived) Gets 4 stars for no instructions and I knew it didn't.Product included everything that I needed my only complaint would be that they really need to include instructions. I’m not sure if any of the kits in Amazon include instructions though. A link to a professionally done video would be even better. The YouTube videos that I saw helped a lot but don’t exactly explain things in the order they should be done but I did get through it and it works perfectly.This is a good kit other than the fact that it wasn't timed right. I had to cut a new keyway. Worked after that.Switch box - every one - is either not wired correctly and is missing key parts (oil alert)If you purchase by the Honda oem box - it cost 2x this entire kit, but it works perfectlyThe one thing that would have been nice was a install instruction and the fact you may have to drill and tap mountingStarter does not engage with Flywheel when turned with battery. Unit did not work. Spent $100 for nothing. I contacted the company that shipped it to us and send them images and videos. It’s been almost 3 weeks since and no response from them at all. My pressure cleaner has since stoped working and the flywheel seems to be completely stuck now.There where no instructions so I don’t even know if I have the charging coil plugged to the right wire.The circled part was missing from the order and it has been hell trying to get the issue resolved.There are no instructions in the box nor on the Internet. It is easy to install if you have a little bit of mechanical knowledge. Works extremely well and is a lifesaver since I have multiple sclerosis and no strength for pull starting.