Hey all, I tried to do a search on how to properly break in a Wiseco piston in my new to me 90 250, but I couldn't find any info on it here, or on Wiseco's website. I have read of a few folks on here that seem very knowledgable about these pistons, and undoubtedly know the proper break in, as I understand if this isn't followed, it tends to lead to premature break down. So, this bike I bought has had a fresh top end rebuild in terms of hours (I'm not sure if it's been started more than once, and it quickly sheared the woodruff key) but it has been about 5 years since this has been done. I put a little bit of oil in the cylinder to help lube the upper cylinder, and I've changed the fluids, cleaned the carb, and added new fuel,but that is about it. I still need the woodruff key to show up for me to fire it up. Looks like the jetting is all stock but the needle clip was all the way to the top of the needle. It also has some type of aftermarket pipe...looks like the signiture on it is a Pst racing...I've never heard of it, but maybe someone has. Also has a FMF shorty silencer on it. Do I need to adjust the jetting for the pipe like I would with a snowmobile, or does it stay the same? Thanks for any help you can offer!