actually, you've done a better deal than you think. the pre 2008 klrs are (in mho) better dirt bikes than the 2nd gen bikes. targeted by Kawa as entry Adventure bikes. Longer travel forks , less weight, no fairing,etc, when u r done w your build, I think you will b more than pleased
on the net's KLR650 site are a bunch of gen 1 experts who (again imho) know more about those bikes than the Kawa engineers themselves.
In any event, fix that subframe problem, and strengthen those footpeg mounts and all will b well.
I Can offer you personal testimonials about the progressive rate fork springs, the chassis lowering dog links, the comfort of the 2014.5 new edition saddle,( find someone who just HAD to have a custom seat and wrangle for his stock one, And there is a san diego group of real life experts who will rebuild and custom spring your rear shock to match your body weight and riding style. HHHHUUUUGGGE difference to quote the Donald
and they are a fraction of the cost of the commercial shock guys.
again gluck. and check youtube for klr raceing. great video.