Originally Posted by
Red Rider
I finally got a hand-coned pipe for my 250R. I've been wanting to try a different pipe, other than my current FMF Gold Series, to see if there was a little more performance to be had. I was interested in a Paul Turner Hi-Rev, and even bought a new one a few years ago, but then returned it, when it was obvious it wasn't going to clear my modified waterpump. Every pipe I've been interested in, I've run into the same clearance issue. After drooling over others hand-coned pipes, I decided to set my sights on one. I finally managed to get in contact with Kenny Roberts, via a liaison, who agreed to make me a custom pipe for my exact setup. He already had a similar year CR 250R cylinder to mock up from, but needed my R power-valve cover & exhaust flange, to mimic my setup. The routing of this pipe is a little different than Kenny's typical 250R pipes. This one passes close to, but not across the face of the waterpump, and is routed a little closer the engine's bottom end, to keep the pipe tucked in better, while still clearing the R power-valve cover. The routing is very similar to pipes for a 1986-91 CR 250R.
For the exhaust flange, I sent Kenny my old, steel, 2-piece, CR/ATC adapter exhaust flange. Once I had the new pipe, the plan was to make a new, 1-piece, billet, o-ringed, adapter exhaust flange. Once again, this will be made on my router table. Thanks to all involved in making this happen. Your help has been much appreciated, and I couldn't have done it without you all.