Often times when replacing exhaust systems, flange design, header length and clearance are extremely important. Here at ktmavt.com, we have found that taking our aftermarket exhaust system (350 EXC-F) and building a double layered gasket helps tremendously with overall performance and seal. Doing this method allows for any slack or room between the flange and head to be completely sealed, even if after installing your aftermarket exhaust. Typically aftermarket parts are designed based off the OEM dimensions, but with variations in drawings and updated model years, this can vary sometimes. Also, manufacturing is not perfect in the aftermarket world, nor is it perfect in the OEM world, but variations in design and dimensions happen frequently.
By allowing your KTM vehicle to cool completely after the aftermarket exhaust install, run a thin line of soap and water mixture, heavy on the soap along the flange face. If that flange starts to bubble, there is still a leak and you need to investigate. That leak will turn into a much larger one in no time, as well as, rob your vehicle of performance. Here at KTMATV.com we have done some extensive market research on aftermarket exhaust systems for the 350EXC-F. This typically includes all your major manufactures, such as, Jegs.com, or Edmonds.com. We have found that http://www.bikebandit.com/aftermarket-parts has a great selection of aftermarket parts and kits to help with your exhaust needs. We suggest prior to purchasing any aftermarket exhaust systems, refer to the KTMATV.com Repair Manual for advice and guidance as to key dimensions needed to source your aftermarket exhaust.
Now, after you have purchased an aftermarket exhaust system, upgrading your headers, gaskets, and dump tubing to accommodate the additional capacity will guarantee that you are getting the best out of your product. Don’t hesitate to contact us today for a list of the great parts and useful guidance when modifying KTM ATV parts.