Boulevard M90 exhaust

520 Views 24 Replies 6 Participants Last post by Zoom, 17 h ago

CaptaiinCaveman_

Discussion Starter · 24 d ago

Hi everyone,
Picking up a 2010 m90 soon and in process of grabbing an exhaust for it.
The exhaust I'm looking at doesn't have a cutouts for the o2 sensor, therefore I'll have to use a o2 eliminator. However would I also need a power commander and auto tune module? Or is stock ecu good enough to handle the exhaust without running too lean to the point where it affects the reliability?

Just the Power commander here is Australia will cost well over $1k with the auto tune module so I'm really trynna stay away from it, the exhaust costs 700 lol

1 - 20 of 25 Posts

Bering_C_Sparky

· #2 · 24 d ago (Edited)

The auto tune module for the Power Commander requires AFR feedback.
So you would have to weld bungs into the exhaust to accommodate the wide band O2 sensors to use that set up.
You could run the Power Commander with no auto tuner module though.
Dynojet has a limited number of tunes on their web page that can be downloaded, or you can have a dyno shop tune it directly.

Have a look at Cobra FI2000 auto tuner and see if they make one for the M90.
The Cobra FI2000 does require AFR feedback.

BCS
LGB/FJB

Bering_C_Sparky

· #3 · 24 d ago

A quick internet search did not turn up any Cobra Auto tuner for M90 hits. (But I did not look very hard)
I found for the M109R, M50, C50 and oddly enough for the S40 (on J&P Cycles)......which has to be misprint. The S40 is a single cylinder and has a carburetor.

I did see that Oneida Suzuki was still listing one of the old Cobra 3 Pot tuners, and it listed the M90 as compatible. So I would imagine Cobra probably does make an Auto Tuner for the M90 as well.

The 3 pot tuner is not the greatest, but would be better than nothing.
It was listed for $160 USD.

COBRA FI2000 / FI2000R...

BCS
LGB/FJB

CaptaiinCaveman_

Discussion Starter · #4 · 24 d ago (Edited)

Bering_C_Sparky said:
A quick internet search did not turn up any Cobra Auto tuner for M90 hits. (But I did not look very hard)
I found for the M109R, M50, C50 and oddly enough for the S40 (on J&P Cycles)......which has to be misprint. The S40 is a single cylinder and has a carburetor.

I did see that Oneida Suzuki was still listing one of the old Cobra 3 Pot tuners, and it listed the M90 as compatible. So I would imagine Cobra probably does make an Auto Tuner for the M90 as well.

The 3 pot tuner is not the greatest, but would be better than nothing.
It was listed for $160 USD.

COBRA FI2000 / FI2000R...

BCS
LGB/FJB

I found a cobra auto tuner but it's similar cost to a power commander and would require o2 sensor as per my research so not a good fit for me.

I can only find the 3 pot FI2000 on Oneida, however they don't ship to Australia

Sounds like a tune is necessary if I'm buying an aftermarket exhaust. However I can't justify spending 2k+ on an exhaust + PC and tune on a 9k bike. Will probably just stick to stock exhaust then unfortunately

Edit:
Found this Healtech FI tuner and looks like it might be the perfect product for my use case. Doesn't use o2 sensor, only costs $350aud and can be mapped pretty easily according to the manufacturer. Any thoughts on it?

Bering_C_Sparky

· #5 · 24 d ago

Might want to read over the information on the Cobra FI2000 you found again.
I would bet much more than pocket change that O2 is not needed with the Cobra FI2000, so no bungs are needed in the exhaust with that tuner.
If you find information to contrary, post it here for us to us to have a look at, as you are first person I have ever heard say this about the Cobra auto tuner, so not sure where you found that information.

BCS
LGB/FJB

CaptaiinCaveman_

Discussion Starter · #6 · 24 d ago

Bering_C_Sparky said:
Might want to read over the information on the Cobra FI2000 you found again.
I would bet much more than pocket change that O2 is not needed with the Cobra FI2000, so no bungs are needed in the exhaust with that tuner.
If you find information to contrary, post it here for us to us to have a look at, as you are first person I have ever heard say this about the Cobra auto tuner, so not sure where you found that information.

BCS
LGB/FJB

I read through the FI2000 manual and it didn't have anything about taking out the o2 sensor or using eliminators, so I assumed that's required. Could be a 100% wrong though.
Any thoughts on the healtech fi tuner pro? That's the only tuner I can find at a decent price as it has an official dealer here down under. We get shafted when having to pay conversion rates and shipping lol

Bering_C_Sparky

· #7 · 23 d ago

CaptaiinCaveman_ said:
I read through the FI2000 manual and it didn't have anything about taking out the o2 sensor or using eliminators, so I assumed that's required. Could be a 100% wrong though.
Any thoughts on the healtech fi tuner pro? That's the only tuner I can find at a decent price as it has an official dealer here down under. We get shafted when having to pay conversion rates and shipping lol

Yes your assumption is incorrect, the Cobra FI2000 does not require AFR feedback.

No I have no opinion on the Healtech tuner as I have never even seen one of those in service on any bike I have worked on.

BCS
LGB/FJB

Reactions: 1

NemoM109R

· #8 · 22 d ago

If you're in SA mate, seek out Lushy at Victor (or there's a mob in Lonsdale that apparently do a good job too).

Reactions: 1

sportsdad2001

· #9 · 17 d ago

Unrelated, purchased a 2009 m90 with cobra street rod exhaust an no stock pipe to come with it. Well I do not like the street rod, way too loud for my taste, is there a baffle I can purchase, or another pipe that will still sound good but not like this set?

Zoom

· #10 · 17 d ago

sportsdad2001 said:
Unrelated, purchased a 2009 m90 with cobra street rod exhaust an no stock pipe to come with it. Well I do not like the street rod, way too loud for my taste, is there a baffle I can purchase, or another pipe that will still sound good but not like this set?

Welcome to the forum. If Cobra doesn't sell a baffle for it, there are universal baffles that might work. Just measure the inside diameter of the pipe and find one that fits.

sportsdad2001

· #11 · 17 d ago

I was reading about cobra QC baffles that are available and make alittle diff, one person wrapped the QC baffle to make them tolerable, that might work. but your opinion, could the baffle currently installed be wrapped and make enough difference? I have never messed with an exhaust and I am not a mechanic.
My only bike with a pipe was a 2003 katana with a hindle pipe, that was nice, not like this cobra, this is intolerable

Zoom

· #12 · 17 d ago (Edited)

The baffles in my Cobra Swepts were the Quiet Core. They weren't too loud, but I didn't like the huffing and puffing sound they made on deceleration. I modified them by drilling out one of the inner baffle walls and wrapping them with exhaust wrap. I love the way they sound now. But to your question, yes they can be wrapped and it does make a difference, they sound deeper and less tinny. I got a package of the material, it's called exhaust packing, off ebay. Wrap it around it tightly and then you can either wrap wire around it or just use plain old masking tape to hold it in place while you get the baffle back in.

The difference between the QC baffles and their regular baffles, is the regular baffles are just a straight through pipe with louvers punched in it. No packing and no baffles, it just makes the pipe smaller to reduce the sound. Wrapping them will change the tone of the sound but not do much for the volume. The QC baffles are made like factory mufflers, they have a perforated inlet that the exhaust goes through, then it goes inside the baffle until it hits a wall, goes back out through louvers, then back in to exit. So the flow changes direction a couple times to reduce the overall noise. Neither are going to be near as quiet as factory, but you can improve them.

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sportsdad2001

· #13 · 16 d ago

Zoom said:
The baffles in my Cobra Swepts were the Quiet Core. They weren't too loud, but I didn't like the huffing and puffing sound they made on deceleration. I modified them by drilling out one of the inner baffle walls and wrapping them with exhaust wrap. I love the way they sound now. But to your question, yes they can be wrapped and it does make a difference, they sound deeper and less tinny. I got a package of the material, it's called exhaust packing, off ebay. Wrap it around it tightly and then you can either wrap wire around it or just use plain old masking tape to hold it in place while you get the baffle back in.

The difference between the QC baffles and their regular baffles, is the regular baffles are just a straight through pipe with louvers punched in it. No packing and no baffles, it just makes the pipe smaller to reduce the sound. Wrapping them will change the tone of the sound but not do much for the volume. The QC baffles are made like factory mufflers, they have a perforated inlet that the exhaust goes through, then it goes inside the baffle until it hits a wall, goes back out through louvers, then back in to exit. So the flow changes direction a couple times to reduce the overall noise. Neither are going to be near as quiet as factory, but you can improve them.

sportsdad2001

· #14 · 16 d ago

Thank you, perfect, that is the info and directions I was looking for. I did some looking and Fortnite has quiet baffles so I will get on that and see what I can do with these. The deep sound is what I would like to end up with, the popping and backfiring on deceleration are just not my style. If silencing these down, does anyone have a recommendation for a better pipe? I tried listening on YouTube and there was a Gman industries hardchrome that seemed to have the deep rumble?

sportsdad2001

· #15 · 3 d ago

So I haven’t had time to order new baffles, been trying to keep the bike running, stalling/ backfir8ng etc. another rectifier ordered for it, anyway, to cut some costs with this bike, if I wrap the current exhaust cores will that quiet them down some? Only been expenses wit( this bike, thinking I should have kept my m50.

CaptaiinCaveman_

Discussion Starter · #16 · 3 d ago

sportsdad2001 said:
So I haven’t had time to order new baffles, been trying to keep the bike running, stalling/ backfir8ng etc. another rectifier ordered for it, anyway, to cut some costs with this bike, if I wrap the current exhaust cores will that quiet them down some? Only been expenses wit( this bike, thinking I should have kept my m50.

Is there a tune on the bike or a fuel system controller? Backfiring and stalling sound like a fuel system problem

sportsdad2001

· #17 · 3 d ago

As far as I know nothing, when I read the initial symptoms they matched exactly with the rectifier issue. I got a very cheap new rectifier ( my mistake) and it worked like a dream on the first ride. Second ride was a very hot day and the bike started again have way thru a short ride and completely stalled out when almost home.
So I have a hotshot rectifier on order now to give another go. Love the bike, but I don’t have patience for issues. May just end up getting rid of it if this doesn’t cure it. My m50 was bullet proof reliable

Zoom

· #18 · 3 d ago

sportsdad2001 said:
So I haven’t had time to order new baffles, been trying to keep the bike running, stalling/ backfir8ng etc. another rectifier ordered for it, anyway, to cut some costs with this bike, if I wrap the current exhaust cores will that quiet them down some? Only been expenses wit( this bike, thinking I should have kept my m50.

It will quiet it some. What the wrapping mostly does is take away the higher pitched tones, making it sound deeper. It's by far the cheapest and easiest thing to try. If you have some old fiberglass insulation, you can even try wrapping some of that around it. The real exhaust baffle wrap they sell is the same thing, just thinner and more dense so it's easier to get it wrapped.

sportsdad2001

· #19 · 2 d ago

That’s great info, I will check and see what the bike shops have around here. They seem to keep less and less on hand. I assume just a mechanics wire to hold the wrap in place. I have to get it quieted down before wife goes as she will not like the loud sound, especially if I don’t already.LOL.

Zoom

· #20 · 2 d ago

Wire works, you can even use masking tape to hold it in place. Once it's in the muffler the tape burns off but you don't really need anything once the baffle is in. Most of the bike shops that sell it either sell or have sold 2 stroke bikes, as they've used it for years in their baffles. It comes in a package with enough to wrap 3 or 4 baffles, and the last pack I got was off ebay.

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