You would need to ensure you were ONLY putting the excess oil (bypass oil) from the filter through the cooler...you dont want to detract at all from the flow or pressure feeding the bottom end or the top end. Most oil coolers take excess flow and pass it through the cooler back to the sump, this way there is no chance of interupting the correct oil flow to the engine. There are a few storys I read over the last few days (going back quite a few years) of XT350 owners who tried using the oil feed (external) to the head as a feed for a cooler and as a result... suffered catastrophic camshaft and head failure due to insifficient oil going to the top end. In the SRX that feed goes up through the barrel to the head... in the 350 version there isnt room for that so it uses and external oil line that feeds the head. Understanding the oil flow in the area of the Oil filter is paramount to getting the Oil cooler setup correct. Attached is a picture of one of the TW200 kits fitted to an XT225 Serow (basically the same engine). I like the design of the Oil cooler... it is a heat sink type rather than shell and tube. Less potential for damage and mounting is just on 1 frame tube in this instance. Unfortunately the contact I have hasnt replied.. so I will just wait and see what happens for now.