after market exhausts and reflash

[Dabrucru]

Hello everyone

As I said in my introduction, almost a year ago, I own a 14 racer. for almost 2 years its been fitted with a pair of short Mistrals and a device that corrects air and fuel mixture , its called Rapid Bike https://www.dimsport.it/en/rapid-bike/rapid-bike-easy/ , I read on another forum, which i presume is very well known with people who visit here, that upon fixing non standard exhausts, a remap is almost mandatory.

I had a little issue lately with finding neutral, but I discovered that I had the cable a little too lose. Initially I thought that maybe the engine was getting a bit hot, but after setting the cable to the right tension everything went to be normal. I can t see any difference with or without the mistrals, just the beautiful sound of this unique engine. I never noticed stalling , backfiring. acceleration is also normal.

Upon reading my message on his forum, the owner told me that , as he has said several times,  Guzzi are lean from factory and it needs a remap, which he offers for sale on his online shop. I told him that I have this device fitted, but he told me that they are useless. I am NOT definetly doubting his knowledge, but since i m not seeing any issues, and this being an open forum , so to say, is it really necessary the remap?

Has anyone been running non standard exhausts without any issues.

Thanks

David

[pete roper]

Are you happy with the way your bike runs? If 'Yes'? Leave it alone.

[Meinolf]

Hi David,

if your bike runs "well" and you enjoy it, why re-map?

Having said so, 99 out of 100 Guzzis will benefit from a re-map by someone who knows what he is doing. And that's regardless of the exhaust used.

The device you've installed changes the voltage signal from the O2 sensor. Not getting TPS or rpm or engine temp or any other signal the use is limited, it only effects AFR within the closed loop window. Which is rather small. And, as one would typically richen the mixture in the closed loop area, the ignition values would have to be adjusted as well. A richer mixture ignites faster, continuing to use the ignition values for the closed loop would certainly waste some of the achievable power/torque increase and might lead to pinging.

I've never measured a Guzzi which, in normal mechanical condition, is to lean. Quite the opposite, they are typically to rich. In some load areas by far to rich.

Cheers
Meinolf

[Meinolf]

Hi Pete,

Are you happy with the way your bike runs? If 'Yes'? Leave it alone.

two of a kind, it seems 

Cheers
Meinolf

[Dave Swanson]

I agree with Pete.  If you are pleased with the way it runs leave it alone.


My 2015 V7 benefited from a map from Beetle  https://www.griso.org/   , but I wouldn't have re-mapped if I didn't believe there was a need for improvement. 

More importantly, if your sparkplug cap/boots are still the factory originals they have a tendency to fail and arc, and an upgrade is in order. There are many threads on this board the detail this modification. 

[Dabrucru]

thanks all for the help and useful info. Yes I am happy with the bike. its performing as it was when it was new.

[Dabrucru]

I agree with Pete.  If you are pleased with the way it runs leave it alone.


My 20158 V7 benefited from a map from Beetle  https://www.griso.org/   , but I wouldn't have re-mapped if I didn't believe there was a need for improvement. 

More importantly, if your sparkplug cap/boots are still the factory originals they have a tendency to fail and arc.  There are many threads on this board the detail this modification.

good to know re sparkplugs caps. the only thing I changed was the voltage regulator which was overchaging the battery. it was marking 15.1 so i was suggested to change it. there are still people who beleive that it was an unnecessary change, but I played safe IMO. I fitted a mosfet unit.

[malik]

I was not happy with the way my 2014's caps joined to the plugs - I prefer a tactile & audible feedback to KNOW the connection is sound. I use NGK XD05F caps & CR9EK plugs. BTW, I run Mistral cans on that machine, and a Beetle map definitely improved its running. But they are all slightly different, and as others have said, if it ain't broke, don't fix it.

If your do have an irresistible urge to "improve" it, I'd recommend the best place to squander your squillions is on the suspension - the difference good quality units, properly (professionally) set up, ican be astounding.

[guzzi771]

I had Mistral exhaust on my V7 III and it was too loud for me plus it backfired and took them off after about 30 miles and AF1 racing gave me most of my money back . I got arrow exhaust now and I they are Amazing not too loud and runs perfect

[Cam3512]

Agostini’s on my ‘14 Special, with DB killers left in.  No reflash required, and continues to run like a top with its new owner.  Sound is glorious!

[Roebling3]

+1 on suspension work. Front end first. Pull the fork tubes up, in the triple clamps, ~12 - 14mm. Read what others have done here. The back end can be much better as well. Proper set up is imperative. You don't have to break the bank to get a much better ride.  R3~

[LowRyter]

I think you're good to go.  The "Rapid Bike" fixes the lean condition. 

[Dabrucru]

Thank you everyone for your replies. re front suspensions, what type of improvement is required? honestly i don t feel nothing wrong with them. I had other bikes with better ones , the only thing i notice is the difference from the rear shocks. The rear ones have plenty of setting, while the front ones , not even one.

[malik]

Again, if you're happy with the front end as it is, it doesn't NEED fixing. The fork oil does need replacing regularly, usually more often than we get around to doing it. Whenever I notice the suspension under performing (well after it should have been noticed), changing the oil in the front seems to calm things down.

I believe that if we think we might need better suspension, first change the fork oil. It's cheap (& probably overdue - I've been told fork oil starts going off after 6 months). See what difference that makes first. Once you've changed it a few times, you could then start tweaking the variables - oil weight, air gap, spacer length, spring weight & type, one by one - to see what works.

Suspension can be improved, and if done right, the improvement can be dramatic (test ride a properly set up V7 III Racer to find that out). In my opinion, just bolting on off-the-shelf hardware is sub-optimal (been there, done that often slightly better, but not significantly so). If you're serious about it, spend the time necessary to seek out a decent suspension guru and spend the money to get it done properly. And have them teach you how to tweak what you've got. .

Note too, that most of us don't want or need infinite or even multiple adjustment capability. We just want to get it working properly, then set & forget.

[Dabrucru]

Again, if you're happy with the front end as it is, it doesn't NEED fixing. The fork oil does need replacing regularly, usually more often than we get around to doing it. Whenever I notice the suspension under performing (well after it should have been noticed), changing the oil in the front seems to calm things down.

I believe that if we think we might need better suspension, first change the fork oil. It's cheap (& probably overdue - I've been told fork oil starts going off after 6 months). See what difference that makes first. Once you've changed it a few times, you could then start tweaking the variables - oil weight, air gap, spacer length, spring weight & type, one by one - to see what works.

Suspension can be improved, and if done right, the improvement can be dramatic (test ride a properly set up V7 III Racer to find that out). In my opinion, just bolting on off-the-shelf hardware is sub-optimal (been there, done that often slightly better, but not significantly so). If you're serious about it, spend the time necessary to seek out a decent suspension guru and spend the money to get it done properly. And have them teach you how to tweak what you've got. .

Note too, that most of us don't want or need infinite or even multiple adjustment capability. We just want to get it working properly, then set & forget.

Thanks again for your reply. Oil change on my next service then