do you want to just speed up the feeder house or the whole headIJ if just the feeder chains then unbolt and flip right hand pulley on front of feeder house so that double belt is on large side of sheave its not recommended to use vs-header drive with strait and flex heads you can purchase a larger sheave for sickle drive on rear of head but this will only speed up sickle if you unlock vs-header drive be very carefull as it has the ability to almost double the drive speed if you are having trouble with straw on cage and no trouble with cylinder loss, you can add cage covers to help straw stay in cage also.... as for parts, it takes me a couple days through the local dealer also but Stu at Central sales in castleton, nd told me once that they could get next day service out of regina SK, dont know if thats still that case due to Home land Security and such feel free to call with questions, not much experience with wheat, but we run 2-N7s august wieser rosholt, sd 605-537-4526 home 877-846-2266 cell