Remus Hypercone Exhaust & Rexxer Tuning

31757 Views 71 Replies 20 Participants Last post by DSUE2015OZ, Jul 30, 2021

tonyjuliano

Discussion Starter · Aug 16, 2015 (Edited)

4

Finally!

After months of waiting, it's time to ditch the stock exhaust and do some tuning.

I had originally opted for, and ordered, a Spark EVO V slip-on, but after waiting for almost 10 weeks, with no delivery on the horizon, I made a decision to go with a Remus Hypercone Titanium.

Also picked up a Rexxer unit for tuning and reprogramming the stock ECU. Spent most of the day at the dyno, getting things somewhat dialed in, and I'm happy to report that it is relatively easy to get some decent power gains out of this motor.

I haven't touched the intake side yet, and the Remus still has the DB Killer installed, but I was able to get an additional 3HP and 2.5FT/LBS of torque, over stock. Not bad at all, should be easy to coax another couple of HP out of her, given more time and effort.

The stock exhaust and catalytic converter are VERY heavy, mine weighed in at almost 14 LBS (with all the fittings and hardware). The Remus Hex Titanium weighs in at just a hair over 3 LBS, so the overall weight reduction was also pretty significant.

The Remus sounds great, nice full tone without being obnoxious - very pleased. Here are some lousy pics, please excuse the cell phone shots - it's been a very long (but rewarding) day...

More to come, as things progress...

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Reactions: 5

21 - 40 of 72 Posts

stavely

· #21 · Aug 31, 2015

OK, thanks.

rulle_retard

· #22 · Sep 2, 2015

Did the rexxer tuning cured the on/off throttle response, at least make it better?

John

· #23 · Sep 2, 2015

rulle_retard said:
Did the rexxer tuning cured the on/off throttle response, at least make it better?

The G2 Throttle Tamer on the thread link makes it better if your having a problem with it as I did: Another THROTTLE discusion

Though not everybody or all throttles are the same as others don't have a problem with it at all.

tonyjuliano

Discussion Starter · #24 · Sep 2, 2015

rulle_retard said:
Did the rexxer tuning cured the on/off throttle response, at least make it better?

Yes, all fueling issues are resolved.

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tonyjuliano

Discussion Starter · #25 · Sep 9, 2015

Okay, tuning is now finally complete. Disabled the O2 sensors today (and removed them), the reset the adaptive parameters.

Final dyno work and some additional fueling tweaks and I'm VERY pleased with the final results.

The end result is just about 82 rear wheel hp. This without removing the baffles.

This bike responds extremely well to the right mods and a good tuning.

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AnotherHobby

· #26 · Sep 9, 2015

How's the clutch with that power? You mentioned slipping above.

tonyjuliano

Discussion Starter · #27 · Sep 9, 2015

Clutch problem solved, just needed to rough up the friction plates a little. Everything is okay now.

This bike is awesome, it's really nice having this much oomph in such a light package. It's almost scary now...

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John

· #28 · Sep 10, 2015

Tony, how's the noise level with your Remus on and baffles in compared to stock exhaust?

I Like everything about the Remus/Rexxer combo, but I'm not keen on exhausts which are too loud, am thinking the Remus is quiet in comparison to others?

tonyjuliano

Discussion Starter · #29 · Sep 10, 2015

John said:
Tony, how's the noise level with your Remus on and baffles in compared to stock exhaust?

I Like everything about the Remus/Rexxer combo, but I'm not keen on exhausts which are too loud, am thinking the Remus is quiet in comparison to others?

It's not quiet - even with baffle.

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John

· #30 · Sep 10, 2015

Ok thanks

CharlieBrown

· #31 · Sep 10, 2015

I wish the Rexxer website was better. There isn't a very good 'mail in' section.

So its $300 to send them the ecu and have them remap it with a generic map (way superior than the oem map with an aftermarket exhaust), then an additional cost to delete the O2 sensors? Then another cost to disable the CEL for unplugging the SAI system?

Thanks!

tonyjuliano

Discussion Starter · #32 · Sep 10, 2015

CharlieBrown said:
I wish the Rexxer website was better. There isn't a very good 'mail in' section.

So its $300 to send them the ecu and have them remap it with a generic map (way superior than the oem map with an aftermarket exhaust), then an additional cost to delete the O2 sensors? Then another cost to disable the CEL for unplugging the SAI system?

Thanks!

I agree, website is not great.

If you are in the US - talk to David @ Redline Performance ([email protected]) - I don't think there will be charge for O2 disable, and if you do this then the SAI will not function anyway.

He ALWAYS answers emails.

CharlieBrown

· #33 · Sep 10, 2015

I dont see any need for the O2 sensors, with the removal of them, you said the SAI wont function, would I need to still unplug it? Would there be CEL?

Is there any purpose in disabling the SAI but leaving the O2 sensors?

tonyjuliano

Discussion Starter · #34 · Sep 10, 2015

CharlieBrown said:
I dont see any need for the O2 sensors, with the removal of them, you said the SAI wont function, would I need to still unplug it? Would there be CEL?

Is there any purpose in disabling the SAI but leaving the O2 sensors?

If you disable the o2 system then there is NO reason to disable SAI. Leave it plugged in,

For those that are still functioning under O2 (closed loop) then disabling the SAI will reduce some of the popping present during decel.

CharlieBrown

· #35 · Sep 10, 2015

I know you have access to a dyno and were able to dyno it multiple times, but did you ever dyno the rexxer remapped ecu before you started adjusting parameters? If so, what did you lay down? Just curious to see how much is left on the table compared to your 80whp

tonyjuliano

Discussion Starter · #36 · Sep 10, 2015

CharlieBrown said:
I know you have access to a dyno and were able to dyno it multiple times, but did you ever dyno the rexxer remapped ecu before you started adjusting parameters? If so, what did you lay down? Just curious to see how much is left on the table compared to your 80whp

No, because I created my own mapping.

I did, however, compare the data contained in the two (after my tuning was complete), and they were ridiculously similar (both fuel and ignition).

This shows that David at Performance Motorsports really knows his stuff. If your system flows similarly to mine (intake and exhaust), and you use his supplied mapping then you will certainly get an outcome very similar to mine. Of course, you will need to disable the O2 to accomplish this.

CharlieBrown

· #37 · Sep 10, 2015

tonyjuliano said:
No, because I created my own mapping.

I did, however, compare the data contained in the two (after my tuning was complete), and they were ridiculously similar (both fuel and ignition).

This shows that David at Performance Motorsports really knows his stuff. If your system flows similarly to mine (intake and exhaust), and you use his supplied mapping then you will certainly get an outcome very similar to mine. Of course, you will need to disable the O2 to accomplish this.

Thats my plan. I emailed David asking for a little more info. I would have loved to use SeaCoast Cycle in NH but they want to charge $350, plus labor, shop fees, blah blah. I can't just simply send them my ECU and have them return it remapped. Ill just wait for a response from David then move forward with sending them my ECU.

Let The Good Times Roll

· #38 · Sep 11, 2015

Tony - could you tell me the size (diam and pitch) of the bolts you used to plug the O2 sensor holes in the exhaust. I am going to get the rexxer tune done soon and I want to have the plugs ready.
Do you have to remove the tank to completely remove (disconnect) the O2 sensor wiring ?
When I had my M1100 rexxer tune done some 12 months ago, I didn't have to send my ECU away - my Ducati dealer did it while I waited - over the internet I suppose. They are going to do my Scrambler the same yet I read on these forums that you guys have to send your ECU to Rexxer. ???
I live in Adelaide South Australia and the local Ducati dealer is the Rexxer agent.
FYI - I loved the rexxer tune on my M1100 - perfect fuelling and near perfect starting and all popping of the exhaust gone and Im sure it ran cooler- but I still found the throttle sensitive.
By the way -thanks for all your contributions to both forums - very helpful and informative.
Kind Regards - Ray.

tonyjuliano

Discussion Starter · #39 · Sep 11, 2015 (Edited)

Let The Good Times Roll said:
Tony - could you tell me the size (diam and pitch) of the bolts you used to plug the O2 sensor holes in the exhaust. I am going to get the rexxer tune done soon and I want to have the plugs ready.
Do you have to remove the tank to completely remove (disconnect) the O2 sensor wiring ?
When I had my M1100 rexxer tune done some 12 months ago, I didn't have to send my ECU away - my Ducati dealer did it while I waited - over the internet I suppose. They are going to do my Scrambler the same yet I read on these forums that you guys have to send your ECU to Rexxer. ???
I live in Adelaide South Australia and the local Ducati dealer is the Rexxer agent.
FYI - I loved the rexxer tune on my M1100 - perfect fuelling and near perfect starting and all popping of the exhaust gone and Im sure it ran cooler- but I still found the throttle sensitive.
By the way -thanks for all your contributions to both forums - very helpful and informative.
Kind Regards - Ray.

Standard O2 plug - M18 X 1.5

Here is an eBay link for plugs for the exhaust...

M18 x 1.5mm Oxygen o2 Lambda Sensor blanking Plug Cap Bang motorcycles and cars

Removing the plugs is dead easy. You do not need to remove the tank. Each sensor has a wire a little over a foot long that mates up with some other wiring using a plastic electrical connector.

The connector for the front sensor is located on the right frame tube that is covered by the right front side panel (the one that shrouds the airbox). Just remove this panel and follow the wire from the exhaust, you will see it.

The rear sensor is even easier. The connector is tucked under the ECU. Take off the right rear side panel, and follow the wire.

As you mentioned, any licensed Rexxer dealer can do this onsite.

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Desmoduke

· #40 · Sep 11, 2015

Hi Let The Good Times Roll. Also in Adelaide (Hills), what exhaust are you running?
Dave

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