So here we go once again i'm rebuilding the bike
this is where the project starts:
i have already made a start and thanks to @Calum 's bearing cup guide i have started making the yz125 forks fit my dtr.
so lets talk forks..
i had the bearing cup made up at a local machine shop using Calum's design. i took the design down with the frame and the yokes. the measurements had to be adjusted to make the cup fit the frame as the size wasn't correct for my frame. i'm not saying his design and measurements was wrong in anyway it just wasn't quite right for my frame. unsure if it changes throughout the models slightly.
so as the yz125 stem is longer and the stock yz top bearing is large than the dt frame the bearing cup is required to make it all fit.
i used a stock yz125 top bearing and stock dt125r bottom bearing to make it all fit. no modifications are required to make the dt bearing fit the stem it's the correct size believe it or not and theres no play.
the axle spindle is larger on the yz forks so you will need to use the yz front wheel.