What’s all this down there? Dear ATVC: I am pretty good at rebuilding shocks and even have a decent grasp of valving (you should see my shim collection in the barn). But one thing that gets me without fail is grasping shock linkages and how they work. Can they be tuned to extract extra performance […] More »

Are triple digit speed numbers possible on a modern 450? Dear ATVC: I have been wondering how fast a modern 450cc quad really is. My friend says he got his over 100mph. Is that even possible? Believe it or not, it is – though pretty unlikely in stock trim. Why? The manufacturers set their machines […] More »

You get a choice based on your feelings toward maintenance. Dear ATVC: I’m on my second set of wheel bearings on my 850 in four years. Admittedly I do ride in a lot of grime but that seems excessive to me. I opted for partially sealed bearings like the ones that came stock but I’m […] More »

The last quad standing also happened to be the recipient of some impressive mass centralization. Dear ATVC: I remember a few years back now all the companies were talking about “centralization of mass”. Then it sort of just disappeared. What happened? Was it just a fad? Actually, no. You’re right in that you don’t hear […] More »

Polaris 500 EFI diagnostic codes tell the tale. Dear ATVC: I’ve been fighting my 2007 Polaris 500 EFI always stalling at idle. You can hold the throttle and it will keep running. No, it’s not the safety adjustment in the cable. I’ve changed and tested so many parts I’m walking in circles. No matter what […] More »

The big DS got several changes throughout its life. The frame wasn’t one of them. Dear ATVC: Would it be possible to put my 05 DS650 motor into a 2000 frame? The Bombardier (Can-Am) DS650 was produced from 2000 -2007 and in that time received a whole plethora of improvements and trim packages along the […] More »

The same but different. Dear ATVC: I have the chance to pick up a very well maintained custom built 250R race quad. I’ve never ridden a 2-stroke but am thinking about using it for what it was built to do – race some local enduro. Coming from much bigger bore 4-strokes, how steep will the […] More »