Review on Hot Rods 4143 Stroker Crankshaft by Rashid Summers

I used this grip on my Yamaha Warrior four wheeler. I was in a situation where I needed a new crankshaft, my cylinder needed to be bored out so I also needed a new piston. The price was only slightly more than a regular piston and crank so I figured why not. I bought a piston and crank, bored the cylinder to match the piston, buffed and polished the head (another $100 well spent), installed the crank, and put everything back together. After going through the break-in process and starting to really "get in" I noticed the engine was running a little hotter than normal. This was due to the longer stroke and higher compression ratio with the carburetor and exhaust intact, causing the bike to rev less than it should. A little word to the wise, go ahead and install your carburetor and install an exhaust that will allow the engine to breathe a little better. This completely eliminated my temperature and lean running problems. Of course, with everything that was done to the bike, I expected more horsepower. Since I was doing all these things at the same time, I can't say exactly what and how much had to do with the crank and piston. However, I can tell you that torque has increased significantly, almost entirely due to the increase in travel. The torque gain is amazing! I drive in 1st, 2nd or 3rd gear most of the time. I ride a lot of twisty trails and stuff. Living in West Virginia, there are a lot of steep climbs there too. The torque made my warrior feel like he had an engine twice his size. The power increase is nice too, but you only really notice it when you open it up, when you hit top speed and such. My top speed has increased by about 15 mph since the restoration, mainly because the revs aren't "redlining" where they used to be, I can get about 2000 rpm more before the valves float. Again, I'm not sure if it's the stroker or if new valve springs were installed, not the best, just new ones. I've thought and researched a lot about whether or not to stroke my engine. To be honest, even after all the research I wasn't sure until the last minute when I ordered the parts. When my wife went to bed that night, I told her I didn't understand. I haven't slept for a few more hours reading and re-reading my research and at the end I just said why not it's just another $100 or so let's give it a try. The next day I told her I had made up my mind and over the next week or so I got all the parts together and started putting everything back together. After breaking it in and then realizing I needed a new exhaust and carburetor injectors, I'm so glad I ordered it I can't even tell you. Whatever your riding style, I'd say don't hesitate to take the stroker. If you do a lot of off-road driving, it's worth getting the engine repaired even if it still works. If all you care about is top speed, I would, but only if I need a new crankshaft anyway. For low-end torque and just plain fun on the trail, this is the best money I've spent on an ATV to improve my fun in that space, but for top-end speed and performance, your money is probably better spent elsewhere. although it means an expert. I have to admit it will outrun my Raptor 660 but the Raptor is a backbone and to be honest it will probably need a top notch rebuild but it's fun to finally let the Raptor eat my dust lol.