Originally Posted by rtwpaul
the 28 liter was the option i was going to go with, but may have to relocate and reweld the mounts or use spaces as it is made for the FCR carb not the BST...once i get it i will know for sure, i'll also be adding a 1 gallon (3.78liter) rotopax to the rear opposite the exhaust can and use the mounting structure to additionally add strength and structure to the sub frame
I'm pretty sure any KTM brand tank that fits a 640 with a FCR will also fit a BST equipped bike... The FCR is actually a much bulkier carb, the only real difference will be cable routing... The BST routes the cables up through the frame and along the left side of the backbone under the tank... The FCR cables are best routed under the top y in the frame before it runs along the right side of the backbone... The BST does have the higher vacuum cap in the center but it should not be much of an issue...
Your tank mounts should be generic to all the LC 4 models, even the Adventure tank will mount up to your SXC, the only real difference is the Adventure has an extra brace that fits into an additional bushing slot that the A tank comes equipped with.... This brace also help protect the rads from getting crushed from a side hit...
What tank are you looking to get?