High-quality operation you're running there, mate. Thanks for coming through with the goods! Comment to Coffmans - change the cheap exhaust clip and screws from silver to black, and if you can get your logo in white or silver (instead of red), it's more in keeping with the look and looks more custom.
Coffman's Exhaust heard all of your comments! Now all of the current Shorty and Thunder exhausts come with black ceramic-coated stainless-steel clamps instead of the polished SS clamp seen in this video. You can also request a nameplate delete if you don't like the red Coffman's logo on the exhaust. Just request "no nameplate" on your order, and they'll be happy to oblige. Cheers! 😉👍 --QM
Wonderful video! Thanks for going the extra mile and getting a proper db reader! One of the best exhaust installation/Sound read videos I have ever seen!
Awesome! Thanks for watching and for the feedback! I'm happy with the Shorty now, and I'll be installing the passenger footpegs soon to see how the clearance is there. I'll post the pics to my TH-cam page. That follow-up video might be about 5 weeks away because I'm leaving for the Scooter Cannonball Run on my little Honda Super Cub C125! Cheers! 😉👍 --QM
Evidently, the bracket that braces the stock exhaust pipe is not removable. That's kind of a deal killer for short pipe mods for this bike. That bracket is ugly.
Agreed! I will be installing the passenger footpegs on my bike, so it won't be too much of a visual nuisance to me. I probably won't ride with a passenger often (or ever), but I'll use the footpegs and brackets to secure my drybags on the back seat/rack. Cheers! 👍 --QM
Man, when you get this thing fixed up, you will miss the journey, because the journey is always more fun than the destination...so, I'll let you do all this to mine if I get one, that's what friends are for!! :)
Get one and bring it over... I'll help you wrench on it! I'm looking forward to road-tripping this bike in the fall. It'll be sitting in the garage getting lonely for about a month, so I'll have to show it some love when I return to Houston near the end of July. Cheers! 😉👍 --QM
would love for someone compare this to the $49 gp shorty… still my #1 favorite but very loud… with one or two baffles inside it sounds more civilized and I prefer not having that big logo on it
@LifeOfBurch tried the GP Shorty on his Rebel... not sure if he still has it laying around after the Two Brothers upgrade. If there are any Rebel 1100 owners in the Houston, TX area that want to try the GP Shorty on their bike, then we can set up my driveway sound stage again! Cheers! 👍 --QM
What makes the Coffman shorty worth $200 more than the GP shorty? I ran the GP on my CTX700 for 4 yrs with NO issues. I just bought the Rebel 1100 & was going that same route, but wanted to check on some alternatives. However, most of the slip-ons are priced too high for what you get. So again...what does an additional $200 get you? So far I don't see that price justified vs the GP...but I'd love to hear a valid counter argument for the extra expense.
Good question! The biggest difference is that the Coffman's exhausts are made from stainless steel (with a CNC machined billet aluminum end cap), and then ceramic coated for a durable color finish. I've had the Coffman's Shorty on my CB500F for over 6 years and 15K miles, and it still looks and sounds like new (never rebuilt or repacked). The GP Shorty is made from cheaper steel, covered with regular high-temp paint, so they tend to rust and lose their finish coating very quickly. I've spoken and ridden with two owners (Rebel 1100 and CTX700) that showed me the rust and degradation after just a few months of use of the GP. Secondly... all of Coffman's exhausts are made in the USA (Ukiah, CA) vs the non-domestic GP (Chinese?). Cheers! 😉👍 --QM
@@QuasiMotard Valid points..but the materials used still don't justify $300 for what amounts to a foot long metal tube. USA made still won't justify an egregious mark up in my book. I had my GP for 4 years here in the Dallas area & never saw any signs of degradation. I'm sure areas where it's colder & they salt the roads sure...or perhaps even high humidity areas farther south you may see those issues you mentioned. Still..for $60 you could buy 3 GP's & still have money left to burn & just replace the pipes every couple of years. 😜 Anyway..I appreciate the quick response & also the great content you offer on your channel. Keep it up & stay safe out there!!
No adjustments were needed! The catalyst is in the exhaust mid-pipe, so the Coffman's slip-on exhaust doesn't drastically affect the airflow or cause the engine to run lean. Cheers! 😉👍 --QM
The Coffman's Shorty is far below the passenger footpeg, and the exhaust outlet is aimed outward (not upward). It shouldn't cause any problems for a passenger other than being noisier than the OEM exhaust. Even with the increased volume levels, it's not as loud as most Harleys or other big-twin cruisers. 😉👍 --QM
YES! Definitely drill the rivet hole because the Coffman's Shorty doesn't have any other positive retention mechanism. The OEM exhaust and the Coffman's Thunder have an upper bolt that attaches to the passenger footpeg bracket... that prevents the exhaust from "backing off" if the lower exhaust clamp loosens over time. The rivet on the Shorty ensures that it doesn't get launched off the bike when you least expect it. Congrats on your Rebel and the Coffman's shorty! Cheers! 😉👍 --QM
@@SololaneMvlog If I remember correctly, it's a 9/64" hole and a 1/8" pop rivet. If you don't have the rivet or rivet gun handy, you can get a cheap kit at any Harbor Freight or Northern Tool supply. 😉👍 --QM
Yes, you'll need a rivet gun and a drill with a 9/64" bit to install the safety rivet. I purchased a cheap kit from Harbor Freight that included the rivet gun, several different dies/tips, and assorted size rivets for around $15. 😉👍 --QM
I did my Coffman install today. Even already had the correct 9/64s drill bit in my tool kit. Needed a pop rivet gun, 11mm and 12 mm sockets and the drill bit. Probably took 10 minutes once I sat down and had at it. Only had a chance to hear it run at idle due to constant rain. I like the sound and volume at idle. More to come when I get a chance to actually ride it.
Thanks for the feedback! I had several viewer requests for dB readings on this exhaust, but I didn't have a decent SPL meter in my toybox. So, it was time to get another toy... problem solved! The Rebel 1100's motor is really torquey... lots of fun to play with. I took it out later that weekend to do some performance runs with my Dragy GPS. The best 0-60 acceleration time was 3.84s in 180.4 feet, and the best 60-0 braking time was 3.04 sec in 130.2 feet. I think it can do better if the traction control doesn't interfere on acceleration...maybe down in the 3.4 - 3.6 sec range. I'm not sure if I can get better braking distance without upgrading to some better pads (EBC HH or similar). Cheers! 😉👍 --QM
@@QuasiMotard did the shorty change the feel of the bike at low rpm ? I ran mine open today to see what it would sound like with no muffler and it dose seem to run a little funny also thanks for the great content
@@Wettoast Thanks for the feedback! I didn't notice any difference in low-RPM behavior between the OEM and the Coffman/s Shorty exhausts. If you're interested in purchasing the Coffman's and don't like the red nameplate on the side, you can request a nameplate delete on your order. The latest versions of the Shorty and Thunder also come with black ceramic-coated stainless-steel exhaust clamps instead of the polished SS clamps seen in this video. Cheers! 😉👍 --QM
@@QuasiMotard are you running yours with or without the silencer?Went ahead ordered one anyways since it seems to be the better option for the time being without being a huge upswept like Vance and Hines and two bros also since you have heard all of them how is the sound volume compared to the others I’m assuming it sounds better than no muffler or that shorty Gp 😄 sorry for so many questions but as far as the rebel goes you are my go to source👍🏻
I am running my Coffman's Shorty as delivered with the silencer core installed. I haven't tried it with the core removed... that would probably be louder than an open pipe. 😉👍 --QM
So, I absolutely love the fact that you're modding your Rebel with 'off brand' parts. I am unable to find any other videos on TH-cam that show installations of exhausts other than V&H and 2Bros. I would love to see more cross platform installations. Do most slip on exhausts have the same pipe diameter, or do we have to be extra careful when buying online?
Thanks for the feedback! I'm not sure about the pipe outlet sizes, but most of the Hondas have this same diameter. I'll take a measurement of the I.D. of the Coffman's when I return to Houston just so you have a reference number. Cheers! 👍 --QM
I have been looking at a Coffman full exhaust for my Honda Grom. How good is the Coffman exhausts? I am either going Coffman or a Yoshi exhaust. I really like how the Coffmans look and they are better priced.
I haven't heard the Coffman's for the smaller bikes yet, so I can't comment on the sound or performance. However, if the build quality of those are equal to these slip-ons, then I'd say they are excellent! These exhausts are made with ceramic coated stainless-steel, and they hold up very well. The one on my Honda CB500F is over 5 yrs old and it still looks and performs like new. I hope to work with Coffman's again in July to develop an exhaust for the Honda Super Cub. I think it will sound great, and it should be similar to the Grom and Monkey exhausts... just different head pipe angles & length and a hangar bracket on the swingarm pivot . Cheers! 👍 --QM
A much more exhaustive test and review than I expected. Bravo. Thank you very much. I have a Two Brothers Racing exhaust, but if I want to add another saddlebag, then this exhaust will be the way I go. Thanks again. Eric in Kissimmee Fl.
Nice, hoping someone hurries up with forward controls for the manual version because I'm a big guy but want a 1100 for a sporty reliable cruiser. Holding out to see if aftermarket catches up.
T-Rex Racing has a bunch of Rebel 1100 products coming down the pipe in October. They have adjustable footpeg extenders (not quite traditional forward controls) as one of their items: www.t-rex-racing.com/2021-Rebel-1100-DCT-Foot-Peg-Extenders-p/n26-21fpe.htm . They will also have adjustable floorboards: www.t-rex-racing.com/Honda-Rebel-1100-Floorboard-p/n26-21fb.htm . Cheers! 👍 --QM
I mentioned that at 2:55 in the video. The weights with mounting hardware are: - OEM: 11.4 lbs (5.17 kg); - Coffman's Shorty: 2.2 lbs (1.0 kg) Cheers! 👍 --QM
No power differences that I can feel so far. The catalytic converter is still in the midpipe, so the difference in backpressure should be negligible. I'm planning to rent some dyno time and tune it properly with tbis Coffman's Shorty and an opened up intake (airbox mod and K&N filter). Cheers! 👍 --QM
Thanks for the feedback! Slip-on exhausts like the Coffman's Shorty don't remove the catalytic converter, so there isn't a drastic change in backpressure or airflow through the engine that could cause an overly-lean condition. As far as I'm aware, it doesn't affect the manufacturer's warranty (at least in the USA), and it won't adversely affect the engine's longevity. On the plus side, there is a considerable weight loss (about 10 pounds)... and that awesome sound! 😉👍 --QM
Thank you. The 1100dct is my first bike and I absolutely love it. So far 1500 miles on her. I appreciate your videos and thank you for answering my question. This likely will be my next upgrade.
Thanks for the feedback, and sorry for the late reply! I'm hope that the Coffman's Shorty worked out for you... it sounds great on my bike! Cheers! 👍 --QM
I see a little discussion but any concerns with performance, motor running rich or lean stumbling on launch or at idle? I like the sound and ability to repack to quiet if wanted. Stock config has plenty of power but I don’t want to make any sacrifices there. Thanks for being the scout on this product.
I will be tuning my Rebel soon. I'm waiting for custom tunes to be available from DynoJet and other manufacturers. I plan to rent some dyno time and tune it properly with a wideband O2 to close-loop tune it with this Coffman's Shorty and an opened-up intake (airbox mod with K&N filter) . We should be able to extract a few more ponies from this motor and also remove the speed nanny at the 100 MPH mark. In the meanwhile, I haven't noticed any reduction or apparent issues from lean burning. The catalytic converter is still in the midpipe, so the difference in backpressure should be negligible. 😉👍 --QM
You didn’t show the removal of the factory pipe, did yours leave the silver gasket in the head pipe or did it stay inside the muffler? I just pulled mine off to dry fit the Two Brothers and the silver sleeve gasket stayed in the head pipe. I didn’t try too hard to remove it because I needed to re-install the stock pipe for a while and didn’t want to destroy it.
I had the same issue the first time I removed the factory exhaust... the graphite gasket stayed on the pipe, but it was easy to remove. I covered the removal of the OEM exhaust in my first video here: th-cam.com/video/zT5RH3F0Wj4/w-d-xo.html . Let us know your opinions on the TBR exhaust! Cheers! 😉👍 --QM
@@QuasiMotard FYI, I put the backrest bracket on Sunday and the saddle bag mounts stack on top of the backrest bracket. The backrest bracket kit includes a smaller spacer and a long bolt for use with the saddle bag mounts so they end up in the same location as yours without the backrest.
I installed the passenger footpegs, so the bracket needs to remain for that function. The bracket can be removed with two 8mm hex bolts that are behind the storage box under the seat (remove the box to locate them). Cheers! 😉👍 --QM
Thanks for the feedback! I'm really enjoying it so far. I've installed the saddlebags and I'm ready to start touring and moto-camping on it this fall! Cheers! 👍 --QM
I know that Coffmans states they are not CA complaint. However, my specific question is that with this video showing dBa measurements, what was the actual dB, did they exceed 80?
You can see the dB measurements for the stock exhaust at 7:01 and for the Coffman's Shorty at 14:03. The OEM exhaust registered 83 dBA at idle, and the Coffman's registered 87 dBA. At 4100 RPM, the OEM registered 97.7 dBA and the Coffman's registerd 102.5 dBA. So, there is about a 4-5 dB increase with the Coffman's Shorty. My REED SPL meter is not certified, and my testing procedures are certainly flawed, but that's as accurate as I could achieve during my testing. Cheers! 👍 --QM
Thanks for the feedback! I'm working with Coffman's again next week to showcase another new exhaust for the Rebel 1100. The new model is longer and its slightly upswept for owners that prefer a traditional look instead of the shorty. 😉👍 --QM
@@QuasiMotard Was just about to purchase the coffman shorty until I read this, cant wait to see the new longer model. Really appreciate all the videos & installs, been following you & life @ birch since you both got the rebel, picked mine up a month ago, imstalled the saddle bags & solo carrier, waiting for honda to ship other accessories
It's not absolutely necessary, but I plan to re-flash the bike sometime in the near future. Slip-on exhausts like the Coffman's Shorty don't remove the catalytic converter from the factory exhaust (it's further upstream in the mid-pipe), so there isn't a huge difference in airflow or backpressure that might cause a lean condition. I plan to upgrade the intake sometime in the future and possibly get a full exhaust (cat-delete). That will certainly require a custom tune to prevent running too lean (hot). DynoJet and other performance tuners are working on flash tunes now... I'm just waiting to see who comes to market first. I'm also hoping that the tune deletes the 100 MPH speed-limiter. 😉👍 --QM
I haven't noticed any reduction in power at all. I have noticed a slight increase in fuel economy when I can keep my lead wrist out of it... and that's not an easy task! 😉👍 --QM
They don't exist... yet! Custom parts for the Rebel 1100 are hard to find right now. Custom EFI tunes are supposedly coming from DynoJet and other performance tuners, but they are also lagging behind. A full exhaust system will delete the cat, so a re-flash or fuel computer will be necessary. Slip-on mufflers retain the cat, so the engine is less likely to run lean. --QM
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High-quality operation you're running there, mate. Thanks for coming through with the goods! Comment to Coffmans - change the cheap exhaust clip and screws from silver to black, and if you can get your logo in white or silver (instead of red), it's more in keeping with the look and looks more custom.
Just saw a manufacturer comment on the Amazon listing: they updated the mounting hardware last week. All black and no exterior bolt.
Coffman's Exhaust heard all of your comments! Now all of the current Shorty and Thunder exhausts come with black ceramic-coated stainless-steel clamps instead of the polished SS clamp seen in this video. You can also request a nameplate delete if you don't like the red Coffman's logo on the exhaust. Just request "no nameplate" on your order, and they'll be happy to oblige. Cheers! 😉👍 --QM
@@QuasiMotard I noticed that already. Very responsive and dynamic company giving customers what they want. Nice!
Wonderful video! Thanks for going the extra mile and getting a proper db reader! One of the best exhaust installation/Sound read videos I have ever seen!
Excellent video. Love the Coffman shortys. My order is already in!
Awesome! Thanks for watching and for the feedback! I'm happy with the Shorty now, and I'll be installing the passenger footpegs soon to see how the clearance is there. I'll post the pics to my TH-cam page. That follow-up video might be about 5 weeks away because I'm leaving for the Scooter Cannonball Run on my little Honda Super Cub C125! Cheers! 😉👍 --QM
Evidently, the bracket that braces the stock exhaust pipe is not removable. That's kind of a deal killer for short pipe mods for this bike. That bracket is ugly.
Agreed! I will be installing the passenger footpegs on my bike, so it won't be too much of a visual nuisance to me. I probably won't ride with a passenger often (or ever), but I'll use the footpegs and brackets to secure my drybags on the back seat/rack. Cheers! 👍 --QM
Man, when you get this thing fixed up, you will miss the journey, because the journey is always more fun than the destination...so, I'll let you do all this to mine if I get one, that's what friends are for!!
:)
Get one and bring it over... I'll help you wrench on it! I'm looking forward to road-tripping this bike in the fall. It'll be sitting in the garage getting lonely for about a month, so I'll have to show it some love when I return to Houston near the end of July. Cheers! 😉👍 --QM
would love for someone compare this to the $49 gp shorty… still my #1 favorite but very loud… with one or two baffles inside it sounds more civilized and I prefer not having that big logo on it
@LifeOfBurch tried the GP Shorty on his Rebel... not sure if he still has it laying around after the Two Brothers upgrade. If there are any Rebel 1100 owners in the Houston, TX area that want to try the GP Shorty on their bike, then we can set up my driveway sound stage again! Cheers! 👍 --QM
@@QuasiMotard I live in a similar neighborhood as yours in LA and turned the whole place into one gigantic soundstage all by myself ;)
What makes the Coffman shorty worth $200 more than the GP shorty? I ran the GP on my CTX700 for 4 yrs with NO issues. I just bought the Rebel 1100 & was going that same route, but wanted to check on some alternatives. However, most of the slip-ons are priced too high for what you get. So again...what does an additional $200 get you? So far I don't see that price justified vs the GP...but I'd love to hear a valid counter argument for the extra expense.
Good question! The biggest difference is that the Coffman's exhausts are made from stainless steel (with a CNC machined billet aluminum end cap), and then ceramic coated for a durable color finish. I've had the Coffman's Shorty on my CB500F for over 6 years and 15K miles, and it still looks and sounds like new (never rebuilt or repacked).
The GP Shorty is made from cheaper steel, covered with regular high-temp paint, so they tend to rust and lose their finish coating very quickly. I've spoken and ridden with two owners (Rebel 1100 and CTX700) that showed me the rust and degradation after just a few months of use of the GP.
Secondly... all of Coffman's exhausts are made in the USA (Ukiah, CA) vs the non-domestic GP (Chinese?). Cheers! 😉👍 --QM
@@QuasiMotard Valid points..but the materials used still don't justify $300 for what amounts to a foot long metal tube. USA made still won't justify an egregious mark up in my book. I had my GP for 4 years here in the Dallas area & never saw any signs of degradation. I'm sure areas where it's colder & they salt the roads sure...or perhaps even high humidity areas farther south you may see those issues you mentioned. Still..for $60 you could buy 3 GP's & still have money left to burn & just replace the pipes every couple of years. 😜 Anyway..I appreciate the quick response & also the great content you offer on your channel. Keep it up & stay safe out there!!
You made it happen Quasi! Thanks bro! I will be ordering mine soon.
Hi! When you installed your coffman's shorty was there any adjustment you made sir?
No adjustments were needed! The catalyst is in the exhaust mid-pipe, so the Coffman's slip-on exhaust doesn't drastically affect the airflow or cause the engine to run lean. Cheers! 😉👍 --QM
@@QuasiMotard okay got it! Thanks
Can you tell me how this affects the passengers foot?
The Coffman's Shorty is far below the passenger footpeg, and the exhaust outlet is aimed outward (not upward). It shouldn't cause any problems for a passenger other than being noisier than the OEM exhaust. Even with the increased volume levels, it's not as loud as most Harleys or other big-twin cruisers. 😉👍 --QM
I just got mine. Do you need absolutely to drill ? It doesn’t stay on without it?! Thanks
YES! Definitely drill the rivet hole because the Coffman's Shorty doesn't have any other positive retention mechanism. The OEM exhaust and the Coffman's Thunder have an upper bolt that attaches to the passenger footpeg bracket... that prevents the exhaust from "backing off" if the lower exhaust clamp loosens over time. The rivet on the Shorty ensures that it doesn't get launched off the bike when you least expect it.
Congrats on your Rebel and the Coffman's shorty! Cheers! 😉👍 --QM
@@QuasiMotard damn ok ...thanks a lot, i just bought the cofman seecond hand, i have no idea what size i need to drill... is it likee a 3-4mm size?
@@SololaneMvlog If I remember correctly, it's a 9/64" hole and a 1/8" pop rivet. If you don't have the rivet or rivet gun handy, you can get a cheap kit at any Harbor Freight or Northern Tool supply. 😉👍 --QM
So you would have to buy a rivet gun if you don't have one for this exhaust ?
Yes, you'll need a rivet gun and a drill with a 9/64" bit to install the safety rivet. I purchased a cheap kit from Harbor Freight that included the rivet gun, several different dies/tips, and assorted size rivets for around $15. 😉👍 --QM
@@QuasiMotard Thanks for your reply ~! Kit
I did my Coffman install today. Even already had the correct 9/64s drill bit in my tool kit. Needed a pop rivet gun, 11mm and 12 mm sockets and the drill bit. Probably took 10 minutes once I sat down and had at it. Only had a chance to hear it run at idle due to constant rain. I like the sound and volume at idle. More to come when I get a chance to actually ride it.
It's the 4th and you and your family are on my mind. Hope and pray you guys are safe and having a blast!!!
How about without baffle silencer?
The Coffman's Shorty has a very short tube length, so running it without the baffle sounds like an open pipe (no muffler). 😉👍 --QM
Already ordered mine. So glad to get rid of that paddle of an exhaust 🤘🏼🤘🏼
Great setup getting the raw note out of both pipes. This motor has so much character on display here; What a monster.
Thanks for the feedback! I had several viewer requests for dB readings on this exhaust, but I didn't have a decent SPL meter in my toybox. So, it was time to get another toy... problem solved! The Rebel 1100's motor is really torquey... lots of fun to play with.
I took it out later that weekend to do some performance runs with my Dragy GPS. The best 0-60 acceleration time was 3.84s in 180.4 feet, and the best 60-0 braking time was 3.04 sec in 130.2 feet.
I think it can do better if the traction control doesn't interfere on acceleration...maybe down in the 3.4 - 3.6 sec range. I'm not sure if I can get better braking distance without upgrading to some better pads (EBC HH or similar). Cheers! 😉👍 --QM
@@QuasiMotard did the shorty change the feel of the bike at low rpm ? I ran mine open today to see what it would sound like with no muffler and it dose seem to run a little funny also thanks for the great content
@@Wettoast Thanks for the feedback! I didn't notice any difference in low-RPM behavior between the OEM and the Coffman/s Shorty exhausts. If you're interested in purchasing the Coffman's and don't like the red nameplate on the side, you can request a nameplate delete on your order. The latest versions of the Shorty and Thunder also come with black ceramic-coated stainless-steel exhaust clamps instead of the polished SS clamps seen in this video. Cheers! 😉👍 --QM
@@QuasiMotard are you running yours with or without the silencer?Went ahead ordered one anyways since it seems to be the better option for the time being without being a huge upswept like Vance and Hines and two bros also since you have heard all of them how is the sound volume compared to the others I’m assuming it sounds better than no muffler or that shorty Gp 😄 sorry for so many questions but as far as the rebel goes you are my go to source👍🏻
I am running my Coffman's Shorty as delivered with the silencer core installed. I haven't tried it with the core removed... that would probably be louder than an open pipe. 😉👍 --QM
love it thanks for the video. but more straight would be more up my ally
So, I absolutely love the fact that you're modding your Rebel with 'off brand' parts. I am unable to find any other videos on TH-cam that show installations of exhausts other than V&H and 2Bros. I would love to see more cross platform installations. Do most slip on exhausts have the same pipe diameter, or do we have to be extra careful when buying online?
Thanks for the feedback! I'm not sure about the pipe outlet sizes, but most of the Hondas have this same diameter. I'll take a measurement of the I.D. of the Coffman's when I return to Houston just so you have a reference number. Cheers! 👍 --QM
I have been looking at a Coffman full exhaust for my Honda Grom. How good is the Coffman exhausts? I am either going Coffman or a Yoshi exhaust. I really like how the Coffmans look and they are better priced.
I haven't heard the Coffman's for the smaller bikes yet, so I can't comment on the sound or performance. However, if the build quality of those are equal to these slip-ons, then I'd say they are excellent! These exhausts are made with ceramic coated stainless-steel, and they hold up very well. The one on my Honda CB500F is over 5 yrs old and it still looks and performs like new.
I hope to work with Coffman's again in July to develop an exhaust for the Honda Super Cub. I think it will sound great, and it should be similar to the Grom and Monkey exhausts... just different head pipe angles & length and a hangar bracket on the swingarm pivot . Cheers! 👍 --QM
A much more exhaustive test and review than I expected. Bravo.
Thank you very much.
I have a Two Brothers Racing exhaust, but if I want to add another saddlebag, then this exhaust will be the way I go.
Thanks again.
Eric in Kissimmee Fl.
Thanks for the feedback, Eric! I will be posting more Rebel videos and updates when I return to Houston in late July. Cheers! 👍 --QM
Nice, hoping someone hurries up with forward controls for the manual version because I'm a big guy but want a 1100 for a sporty reliable cruiser. Holding out to see if aftermarket catches up.
T-Rex Racing has a bunch of Rebel 1100 products coming down the pipe in October. They have adjustable footpeg extenders (not quite traditional forward controls) as one of their items: www.t-rex-racing.com/2021-Rebel-1100-DCT-Foot-Peg-Extenders-p/n26-21fpe.htm . They will also have adjustable floorboards: www.t-rex-racing.com/Honda-Rebel-1100-Floorboard-p/n26-21fb.htm . Cheers! 👍 --QM
How much did the stock muffler weight?
I mentioned that at 2:55 in the video. The weights with mounting hardware are:
- OEM: 11.4 lbs (5.17 kg);
- Coffman's Shorty: 2.2 lbs (1.0 kg)
Cheers! 👍 --QM
Did you notice any power difference or quality difference in the way it runs? Also did you install a power commander or something similar?
No power differences that I can feel so far. The catalytic converter is still in the midpipe, so the difference in backpressure should be negligible. I'm planning to rent some dyno time and tune it properly with tbis Coffman's Shorty and an opened up intake (airbox mod and K&N filter). Cheers! 👍 --QM
Thanks for your contribution I’ve learned a lot on your vids. Question. Does the short exhaust affects the engine life or warranty in anyway?
Thanks for the feedback! Slip-on exhausts like the Coffman's Shorty don't remove the catalytic converter, so there isn't a drastic change in backpressure or airflow through the engine that could cause an overly-lean condition.
As far as I'm aware, it doesn't affect the manufacturer's warranty (at least in the USA), and it won't adversely affect the engine's longevity. On the plus side, there is a considerable weight loss (about 10 pounds)... and that awesome sound! 😉👍 --QM
Thank you. The 1100dct is my first bike and I absolutely love it. So far 1500 miles on her. I appreciate your videos and thank you for answering my question. This likely will be my next upgrade.
Ordered my Coffman’s exhaust tonight because of your video. Thanks for everything 👍🏻
Thanks for the feedback, and sorry for the late reply! I'm hope that the Coffman's Shorty worked out for you... it sounds great on my bike! Cheers! 👍 --QM
high quality content
Thanks for the feedback! 😉👍 --QM
I see a little discussion but any concerns with performance, motor running rich or lean stumbling on launch or at idle? I like the sound and ability to repack to quiet if wanted. Stock config has plenty of power but I don’t want to make any sacrifices there. Thanks for being the scout on this product.
I will be tuning my Rebel soon. I'm waiting for custom tunes to be available from DynoJet and other manufacturers. I plan to rent some dyno time and tune it properly with a wideband O2 to close-loop tune it with this Coffman's Shorty and an opened-up intake (airbox mod with K&N filter) . We should be able to extract a few more ponies from this motor and also remove the speed nanny at the 100 MPH mark. In the meanwhile, I haven't noticed any reduction or apparent issues from lean burning. The catalytic converter is still in the midpipe, so the difference in backpressure should be negligible. 😉👍 --QM
@@QuasiMotard thank you for the update. I’ve ordered mine direct from Coffman.
You didn’t show the removal of the factory pipe, did yours leave the silver gasket in the head pipe or did it stay inside the muffler? I just pulled mine off to dry fit the Two Brothers and the silver sleeve gasket stayed in the head pipe. I didn’t try too hard to remove it because I needed to re-install the stock pipe for a while and didn’t want to destroy it.
I had the same issue the first time I removed the factory exhaust... the graphite gasket stayed on the pipe, but it was easy to remove. I covered the removal of the OEM exhaust in my first video here: th-cam.com/video/zT5RH3F0Wj4/w-d-xo.html . Let us know your opinions on the TBR exhaust!
Cheers! 😉👍 --QM
@@QuasiMotard FYI, I put the backrest bracket on Sunday and the saddle bag mounts stack on top of the backrest bracket. The backrest bracket kit includes a smaller spacer and a long bolt for use with the saddle bag mounts so they end up in the same location as yours without the backrest.
awesome! thanks for your work!
Complaining about a guy cutting wood while installing a shorty pipe
LOL! Different social expectations based on daytime vs nighttime hours.
Are you planning on taking off the original exhaust mounting bracket can it be taken off ?
I installed the passenger footpegs, so the bracket needs to remain for that function. The bracket can be removed with two 8mm hex bolts that are behind the storage box under the seat (remove the box to locate them). Cheers! 😉👍 --QM
@@QuasiMotard thanks!
Sweet sound! Love the look
This bike is a master piece, congratulations
Thanks for the feedback! I'm really enjoying it so far. I've installed the saddlebags and I'm ready to start touring and moto-camping on it this fall! Cheers! 👍 --QM
not available in california?
I know that Coffmans states they are not CA complaint. However, my specific question is that with this video showing dBa measurements, what was the actual dB, did they exceed 80?
You can see the dB measurements for the stock exhaust at 7:01 and for the Coffman's Shorty at 14:03. The OEM exhaust registered 83 dBA at idle, and the Coffman's registered 87 dBA. At 4100 RPM, the OEM registered 97.7 dBA and the Coffman's registerd 102.5 dBA. So, there is about a 4-5 dB increase with the Coffman's Shorty. My REED SPL meter is not certified, and my testing procedures are certainly flawed, but that's as accurate as I could achieve during my testing. Cheers! 👍 --QM
Thanks
Best looking and sounding exhaust I’ve seen. Great vid
Thanks for the feedback! I'm working with Coffman's again next week to showcase another new exhaust for the Rebel 1100. The new model is longer and its slightly upswept for owners that prefer a traditional look instead of the shorty. 😉👍 --QM
@@QuasiMotard Was just about to purchase the coffman shorty until I read this, cant wait to see the new longer model. Really appreciate all the videos & installs, been following you & life @ birch since you both got the rebel, picked mine up a month ago, imstalled the saddle bags & solo carrier, waiting for honda to ship other accessories
Do you have to run a tune after?
It's not absolutely necessary, but I plan to re-flash the bike sometime in the near future. Slip-on exhausts like the Coffman's Shorty don't remove the catalytic converter from the factory exhaust (it's further upstream in the mid-pipe), so there isn't a huge difference in airflow or backpressure that might cause a lean condition.
I plan to upgrade the intake sometime in the future and possibly get a full exhaust (cat-delete). That will certainly require a custom tune to prevent running too lean (hot). DynoJet and other performance tuners are working on flash tunes now... I'm just waiting to see who comes to market first. I'm also hoping that the tune deletes the 100 MPH speed-limiter. 😉👍 --QM
👍👍🔥🔥🏁🏁
Do you think it will reduce power?
I haven't noticed any reduction in power at all. I have noticed a slight increase in fuel economy when I can keep my lead wrist out of it... and that's not an easy task! 😉👍 --QM
Thanks. I have had my 1100 DCT for about two months and wanted to do what you did but I got different information. Now I will get one.
Just get a full system exhaust already
They don't exist... yet! Custom parts for the Rebel 1100 are hard to find right now. Custom EFI tunes are supposedly coming from DynoJet and other performance tuners, but they are also lagging behind. A full exhaust system will delete the cat, so a re-flash or fuel computer will be necessary. Slip-on mufflers retain the cat, so the engine is less likely to run lean. --QM
Every 3 decibels = twice as loud. So, revving out, it's now (+9 Db)16 times louder than before. Great for annoying everyone.