Too much power

[lazieboy]

Here is what i am looking at. Is this the correct tool to remove small gear. if so do i need to remove to put the key back in.? What happens if u go without this part. 1st time doing this. Couldnt attatch pics how do i resize my jpeg to send?

Is this the removal tool. how to remove.

 

[lazieboy]

Found this and it helped me alot. pics step by step tear down. MotoredBikes.com: Motorized Bicycle Forum - Al.Fisherman's Album: Teardown Chinese HT 49/80cc engine.

 

[Goat Herder]

This has cool info too. http://motorbicycling.com/f39/bicycle-engine-tear-down-391.html

 

[ducedave]

same thing with the key on my drive sprocket-welded sprocket to the nut and the nut to the edge of shaft works fine