Wednesday, May 11th, 2011

Grizzly 700: REVIEWED: QuadCrazy



Words and Review by QuadCrazy.com

I decided that it was time to install a new muffler on my 2004 Yamaha Grizzly, and with all the choices out there, HMF had a nice slip on assembly that seemed to be widely used, and suggested when surfing the web. Below is my review from start to finish, what it entailed, and an overall review of the installation procedure, tuning, and after thoughts.

First off, I was impressed with the packaging that HMF uses. The pipe and muffler were very well cushioned within the box. The hardware and instructions came in plastic packaging, along with a small aluminum or tin HMF marked box, which holds a few different size carburetor jets. Jetting is necessary for proper performance and warranty, as per their website. This was going to be the first time this quad was going to be jetted or have anything really done to it outside of oem.

The first thing I did was lay out my parts and grab the tools I needed. There was going to be 2 steps here, exhaust install and re-jetting the carb per HMF recommendations. So I decided to tackle the exhaust install first. I removed the plastic panels from both sides of the quad, removed the seat also, to expose the air box. The actual pipe and muffler looked to be an easy removal with a clamp on the engine pipe/header, and one frame bolt at the muffler. I proceeded to try and loosen the muffler bolt, and then it snapped! That set me back a little in time, but was an easy fix, as I tapped the remaining portion of the broken bolt out with a steel punch. I then removed the clamps from the header pipe, and slid the old exhaust off. The HMF pipe slides right into the muffler and all you need to do is attach the tension spring to keep them together as one unit. I slid the slip on unit in through the back and onto the engine pipe, then installed the clamps. I aligned it up and installed a new bolt and nut on the rear muffler frame bracket. That’s it! Took less than 30 minutes (not counting the broken bolt) to install this slip on exhaust.

Read the rest of the view at QuadCrazy.com

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