Installing a Harley-Davidson fork-tube cap with the front end assembled on the motorcycle can be a real pain. Compressing the spring while rotating the cap to engage its fine threads requires a deft touch and Herculean strength.
JIMS' No. 5821 Fork Cap Installation Tool ($142) makes this job much easier. In fact, with this tool, a proverbial 98-pound weakling should be able to install a fork cap in a few minutes without even breaking a sweat.