Here is klx xl that I did after brian richards tacked togther 5 frames of which 3 are now complete bikes. The cr tank is great looking but $$$, I used a $25 kx 80 tank
this one cost $1500 to complete, but they do have inherent problems, mostly because the 500 motor is being squeezed into a tight space.
the major problem is carby location... I never really sorted this out and I ended up with the really long intake which is terrible for top end power, I also just used a standard carby which is far from ideal. that part of the frame needs modifying to get the carby close IMO.
Another issue is they are very front end heavy.(that big donk again..)
The ITC shocks dont work.. unless revalved and resprung .. i used standard KLX shocks with heavier springs and IT front end again with heavier springs.
A nice bike to ride though, but slow. Unfortunately I then rode the same 510 husky like brad did and i was totally blown away! So i sold this one ($1500) and got a dead (very)510, which has been the most expensive resto i have ever done but thats another story..
So the kxl was a lot of work for not much money, (Part of the fun to do it as cheap as possible!) having access to a tig and lathe is a must. The husky was easy to revive (not a lot of work) just a sh*&tload of $$$!! talk about killing the vmx budget...