Review of the Yoshimura Slip-on Silencer for the 400EX

I got my 400ex about a year ago and was very pleased with the performance of the machine, it pulled through every gear hard. After a couple of months i got used to the power of the 400ex, and started looking for pipes in magazines and the internet. I looked at DG and FMF, and they seemed like great pipes, but I kept doing my research.

It was in my issue of Dirtwheels where I just happen to come across a little article saying that Yoshimura was the #1 pipe claimed by pros. So I started looking into that pipe. I started asking around and people said that the Yoshimura was a great pipe, and it increased the power so much.

In December I recieved the Yoshimura slip on pipe for $239.99 from Rocky Mountain ATV. When I got it I right away noticed the weight difference. The Pipe looked great, so me and my dad installed it and fired it up right away. WOW!! The sound difference was great, the deep throaty sound of a 4-stroke. So then i took it out in the snow and noticed that it indeed gave me alot more torque down low and pulled very hard through midrange.

One thing that I did not like was that since the pipe gave me more torque it felt that it was harder to start off in 1st but once I reved it out and clicked into second those troubles were all gone. I would say this is a must buy pipe for the 400ex. I was very pleased with it and I know that other people that buy this pipe will be too.