As Erik noted, spring length for K/XL front forks vary a bit, with many such spring specimens sacked and thus, a bit shorter than the stock length.
- LR K-XL Fork Springs.jpg (400.01 KiB) Viewed 24362 times
A stock KHK fork tube had a length of 21-7/8” and spring length of 18-7/8”. In this case the spring was compressed about 5/8” when installed on the damper rod/valve body. The image below shows the spring to be slightly longer than the KHK valve body/damper rod assembly when fully extended.
- LR KHK fork tube spring and valve body.jpg (129 KiB) Viewed 24362 times
Extrapolating to your XL situation with a tube length of 22-3/4”, it wouldn’t be unreasonable to expect the XL spring to be 7/8” longer and a damper rod/valve body combination with commensurate length increase?
Another common replacement spring used in XL front ends with sacked springs is the Progressive Suspension dual rate spring shown at the link below.
https://www.progressivesuspension.com/p ... spring-kitBelow is a comparative spring length image of the 11-1120 spring and a stock KHK spring, which shows the overall length would be workable in the longer XL fork tube.
- Stock KHK and Progressive XL replacement spring.jpg (69.69 KiB) Viewed 24362 times