860Rider
New member
Good day all. I just wanted to share my experience with Coffman’s slip on.
Install: this was about as easy as it could be. I DID use the pop rivet as that’s what the instructions say to use. Took me all of 15min.
Looks: Defiantly an attractive looking pipe. I went with the black tip and the red lettering looks good against the powder coat. Looks like it came with the bike.
Sound: My favorite part. Sounds like it has multiple personalities. Low grumbling, growling, and as it winds up a nice even pitch that has a pleasant “MID range tune” to the ears IMO. I have about 900 miles on since my install. 496 of those in 1 weekend in a group ride called “Operation NY Cheesecake”. It’s a youtube community based group ride. I received all compliments on the sound over my old stock system. Im good friends with most of these guys, and they have no issues telling me if they didn’t care for it. A couple of them took my bike for a quick ride and came back loving it. 1 of the guys has a Duc Hypermoto and spent a good 1800 on a slip on alone, and even he remarked that my slip on had more character than his.
Sound Volume: this will be hit or miss with some folks. I brought ear plug with me to this group ride thinking I was going to need them. Nope. I ran the whole trip without using them. I have a Scorpion EXO 1100 helmet. Not the quietest but enough that I did feel the need to put them in. Remember the tip can be turn down and away to further reduce the sound. At 37 Im not a young guy so things are louder than they used to be 10 years ago..LOL
Power loss issue: This took some looking up, and I went right to the source, and had a candid conversation with Mr. Coffman. I then took that info and researched other motorcycle forums experience, and my conclusion is as follows. With a stock airbox, filter, and fuel management the make and model specific baffle that comes with the exhaust must be left in, and left alone. If a smaller baffle is replaced, or removed all together a fuel management system must be added to adjust for the increased air flow. At which point you might as well do the airbox mod. I have an all stock system, and with the slip on I’m not “feeling” a loss. If anything Im “feeling” that the bike winds up a hair faster. I defiantly don’t feel a loss. Having ridden 3000 on my FZ8, and 9000 miles on my original bike (yzf600r) and having that professionally modified Im confident on what I can feel. I will say that Im NO expert and do not have dyno proof, but then again no one that I research has dyno proof saying there is a loss. It’s all been based on what they “feel”
Conclusion: A great looking, great sounding system that has some great potential. A US made small business with great customer service. When you call, you’re speaking to a member of the family. A real live person. One that calls you back or replies within hours. How many other companies do that now a days?
Please keep in mind this is MY experience, and is to be taken as such. I will state again, that Im NO expert and my findings were my own. This thread is in NO MEANS MEANT to HURT, INSULT, OFFEND, SHAME, OR PROVE TO ANYONE BUT MYSELF. I don’t expect anyone to take my word for it. Find out for yourself, and Happy riding to all.
Install: this was about as easy as it could be. I DID use the pop rivet as that’s what the instructions say to use. Took me all of 15min.
Looks: Defiantly an attractive looking pipe. I went with the black tip and the red lettering looks good against the powder coat. Looks like it came with the bike.
Sound: My favorite part. Sounds like it has multiple personalities. Low grumbling, growling, and as it winds up a nice even pitch that has a pleasant “MID range tune” to the ears IMO. I have about 900 miles on since my install. 496 of those in 1 weekend in a group ride called “Operation NY Cheesecake”. It’s a youtube community based group ride. I received all compliments on the sound over my old stock system. Im good friends with most of these guys, and they have no issues telling me if they didn’t care for it. A couple of them took my bike for a quick ride and came back loving it. 1 of the guys has a Duc Hypermoto and spent a good 1800 on a slip on alone, and even he remarked that my slip on had more character than his.
Sound Volume: this will be hit or miss with some folks. I brought ear plug with me to this group ride thinking I was going to need them. Nope. I ran the whole trip without using them. I have a Scorpion EXO 1100 helmet. Not the quietest but enough that I did feel the need to put them in. Remember the tip can be turn down and away to further reduce the sound. At 37 Im not a young guy so things are louder than they used to be 10 years ago..LOL
Power loss issue: This took some looking up, and I went right to the source, and had a candid conversation with Mr. Coffman. I then took that info and researched other motorcycle forums experience, and my conclusion is as follows. With a stock airbox, filter, and fuel management the make and model specific baffle that comes with the exhaust must be left in, and left alone. If a smaller baffle is replaced, or removed all together a fuel management system must be added to adjust for the increased air flow. At which point you might as well do the airbox mod. I have an all stock system, and with the slip on I’m not “feeling” a loss. If anything Im “feeling” that the bike winds up a hair faster. I defiantly don’t feel a loss. Having ridden 3000 on my FZ8, and 9000 miles on my original bike (yzf600r) and having that professionally modified Im confident on what I can feel. I will say that Im NO expert and do not have dyno proof, but then again no one that I research has dyno proof saying there is a loss. It’s all been based on what they “feel”
Conclusion: A great looking, great sounding system that has some great potential. A US made small business with great customer service. When you call, you’re speaking to a member of the family. A real live person. One that calls you back or replies within hours. How many other companies do that now a days?
Please keep in mind this is MY experience, and is to be taken as such. I will state again, that Im NO expert and my findings were my own. This thread is in NO MEANS MEANT to HURT, INSULT, OFFEND, SHAME, OR PROVE TO ANYONE BUT MYSELF. I don’t expect anyone to take my word for it. Find out for yourself, and Happy riding to all.
