So close but so far away. Dear ATVC: Original problem: Been sitting up for a while, says Check Engine and Hot immediately after turning the key (engine tries to but fails to turn over). Figured I might get a OBDII code reader to check the diagnostic codes. Replaced fuel injector already, probably going to replace […] More »

Stroking along. Dear ATVC: This is probably a stupid question but I’m taking Intro to Mechanics in school and all we learn about are 4 stroke engines. I know 2 strokes came first. What determines how many strokes an engine can have? Do they always have to be even numbers? Well for starters, that is […] More »

Top performance crated up from Honda Performance Development. Traditionally, the path to the highest level of racing performance is to start with a stock machine and spend countless dollars and hours in modifications to make the engine “race ready”. Honda is about to turn this tradition on its head by making the same engine that […] More »

The extinct DS650. Dear ATVC: Does anybody know where I can get a full crank shaft or which BMW crank would fit my 2005 Can-Am DS650? Parts for the mighty DS are becoming ever more scarce so the few places that do carry them are able to command a pretty penny. Our searches even of […] More »

Corrosive conundrum. Dear ATVC: I ended up purchasing a used bottom end on eBay for my 1994 Yamaha Timberwolf 4×4 since my engine needed a new crankshaft and I wasn’t feeling up to splitting the case. What I received today was different than the pictures in the listing – the connecting rod, crankshaft, balancing shaft […] More »

It gets a little complicated, but it is all connected. Dear ATVC: This is probably a stupid question but I see a foot-pound rating on certain manufacturer spec pages. While I realize it’s telling us torque instead of horsepower, what does it mean exactly? Is there a translation? Not a stupid question at all. Horsepower, […] More »

How are they doing this? Dear ATVC: I just got back from Round 5 of the ATVMX National Championships and have a question about jumping. I notice when the riders go f or the big leaps, the take-off sends the nose of the quad skyward then they swing the machine in the opposite direction to […] More »