As for the repair kit, the only thing I can complain about is the needle bad size and heavy fit. The rest of the products can be. Workmanship is not the worst, but if I had to buy this product I would reconsider.
The filter fits the Jawa Mustang very nicely. Small, not chewing si3 in the eyes like the paper ones. I think it's worth paying the extra 3-4zl. Nothing si3 is airing up. I recommend