Replaced my FCR-MX pilot jet with a new Keihin pj and the last couple turns started to have some resistance before it seated, not a lot, but enough to make me wonder. I took it back out and looked it over (looked fine), screwed in the old PJ and it went in fine, no resistance till seated as usual . I don't want to damage my carb. Anybody else run into this ? Should I use the jet or order another one?