6th gear is now no longer available but I have made these kits from new-old-stock from Suzuki & Aprilia
Limited stock remaining
As an alternative you can use our close-ratio gear sets which contain 2nd and 6th as part of those kits.
Items required to solve common 2nd gear jumping problem on UK VJ21 & VJ22, RS250 (some JDM bikes vary), check your ratios
2nd gear 26T
6th gear 21T
You may also wish to add oil and sprocket clips separately. You may also require a shift fork depending on how severe the problem was.