Best ECU additional tuner for BS6 - Euro V 411

[Shere Khan]

Hello everyone,

I am almost ashamed to ask such question here where most of you own big bore kits and Himalayan / Scram builds pushed to their limits, but...

I own a humble stock Himalayan BS6 - Euro V and I am suffering occasional stalling at stop lights. This being sporadic, it doesn't really bother me but since I believe it's due to Euro V lean emissions I would like to try an additional module for the lambda O2 sensor and see if this enrichment makes things better.

Since I am not a tech when it's down to tuners, electronics, maps, ecc. I would love to hear your opinions to the differences between these modules and their pro / cons.

I don't plan to build up my Himalayan at the moment: I am ok with stock air filter and exhaust. No aftermarket cams nor big bore kits unless something breaks and since replacement would be needed, then I would go to upgraded aftermarket parts. I would swap my 411 motor for a 440 crate engine if this was sold as a whole replacement unit somewhere around India though... LOL... but this is another tale.

Now, back to the tuners I found and my considerations about them.

Option 1- FuelX Lite
- Pro: auto-adapts? I mean... Improvise. Adapt. Overcome? [cit.], made in India (these folks should know a thing or two about Himalayans)
- Cons: first and foremost, highest price of all options in my country

Option 2 - Rapidbike Easy
- Pro: made in Italy, might be connected to a PC to see data about the map?, comes with two trimmers that should allow fine tuning and should be Trimmer1: response speed, Trimmer2: O2 correction level, cheapest of the options in my country
- Cons: does not auto-tune (is this a disadvantage?), does not seems to be working at high revs (when map is so called "open loop"?)

Option 3 - Moto Carronas' Tuner
- Pro: made in Italy by folks who know well the Himalayan, reportedly comes with 3 trimmers to tune work at low, medium and high rpms
- Cons: no real info about this tuner can be found around and it costs in between the Rapidbik and the FuelX

What are your thoughts? We go from no trimmers to two trimmers, to three trimmers... all these modules should do the same work but surely in a very different way since their differences in construction.

 

[sam2019]

I once owned the Moto carronas version albeit for a BS4 model, later sold it to a friend who was happy with it. I went on to use the red box then which gave more detailed tuning options.
I know nothing about Rapidbike Easy - but if it only works on the o2 sensor (like any of the fuelx versions) it will only work in close loop, steady going, not in acceleration (not in high revs like you suggest, if high revs are steady its close loop).
I really have no clue what a fuelx lite can do - but if you want to try it @Dool has one for sale
I would always opt for a fuelx pro simply because if you ever upgrade it does not become useless (the lite only works for 411cc).
You are right in assuming the folks here do not know much about fixing a stock engine that cuts out.
In a BS4 there where more options but the BS6 is so castrated that its hard to imagine anything less that fuelx pro would do anything. Of course a PT V4 would be better, more options to play with and future proof, as mentioned above.
Because you are in Italy you can contact Moto Carronas, he has that expensive gear that can tune the stock ECU directly and he has 2 440 cylinder sets, maybe you can grab one off him.
also have a look at the sellers subforum, fuelx lite, pro and PTV4 are for sale there.

 

[Shere Khan]

I once owned the Moto carronas version albeit for a BS4 model, later sold it to a friend who was happy with it.

The Carronas tuner I posted in the pictures works both for BS4 and BS6. The one you had was the same model with 3 trimmers? Do you remember how you set it up? At this time Pablo just told me it works good (again only generic info, uff). Also he said he learnt how to completely reprogram the bike original ECU. But this would mean to bring him the bike, and right now I am just looking for an enricher I can easily fit on my own in the garage.

I really have no clue what a fuelx lite can do - but if you want to try it @Dool has one for sale

... Dool? You mean Peter?? Is that you?

I would always opt for a fuelx pro simply because if you ever upgrade it does not become useless (the lite only works for 411cc).

Yeah, as far as I know I wouldn't need the Pro because the difference with the Lite is that the latter auto-tunes around Pro's level 6-7 out of 10 and that's more than adeguate for stock bikes. Level 8-up is for air filter, exhaust and cam swap builds.

Because you are in Italy you can contact Moto Carronas, he has that expensive gear that can tune the stock ECU directly and he has 2 440 cylinder sets, maybe you can grab one off him.

If for any reason my engine breaks I send the bike to him to have a big bore + ECU tune done instead of buying OEM replacements, of course. But until then I shall live with my stock bike eheh

 

[sam2019]

... Dool? You mean Peter?? Is that you?

yep, thats him

 

[sam2019]

The Carronas tuner I posted in the pictures works both for BS4 and BS6.

really? the cabling of BS4 and 6 differ substantially. I dont see how that is possible. but who knows, its been 7 years since I laid hand on it.

 

[Dool]

Fx is plug and play, I don't think the other 2 are.
I you can send me a picture of your O2 sensor cable connector I might be able to help with a fx lite.

 

[Shere Khan]

LOL it's a small world, after all! Glad to meet you here too Dool!!
Unfortunately I didn't know you also had a FuelX for sale, we might have had it shipped alongside with the tensioner (for other readers context, I met Dool on another forum and he was so kind as to help me with a unicorn tensioner he owned).

really? the cabling of BS4 and 6 differ substantially. I dont see how that is possible. but who knows, its been 7 years since I laid hand on it.

Sorry, let me rephrase. Carronas sells the same kind of tuner (3 trimmers) with different connections and settings depending on whether you are gonna fit the module on a BS4 or on a BS6.

Fx is plug and play, I don't think the other 2 are.
I you can send me a picture of your O2 sensor cable connector I might be able to help with a fx lite.

They should all be plug and play, since them being bike specific. I'll be back as soon as I can with a picture.

 

[Shere Khan]

Here are the pictures of my O2 sensor connector

 

[Dool]

Cool, I'll send pics tomorrow of the fx I have with that connection.
All have 4 wires, the Dealer here has confirmed that the fx is all the same just different plugs for different models.
It's an O2 Cheat after all
Like the Gloves.

 

[Shere Khan]

No need to send pics then, let's just discuss the price via PM

 

[Dool]

Ahh well, pics of the style I have available in pro and lite.

 

[Dool]

Wishing to be in control of the fueling would IMO require knowing the Air Fuel Mixture.
Best done with an AFR Meter that uses a Wide Band sensor ( 6 wires) attempting to use an OBD11 adapter is useless as it can only read from the stock Narrow Band sensor (4wires) which was never meant for a gauge/meter.
Plug chops are very useful but rarely done correctly so as to be little more exact to running your finger around the muffler outlet.

 

[Shere Khan]

Only previous experience I have with fuel modules is the Fuelpak FP3 I had on a Harley. It run great with aftermarket mufflers and air filter. If I ain't wrong, I am almost sure it was a 6 pin connector in that case. Anyway for the Himalayan is good what we have. Not expecting miracles, just smooth out a little the power band at low regime and idle. I think it doesn't really change that much from one module to the other, in the end I went for the cheaper at my location (RapidBike Easy). I'll let you know how it goes.

 

[Shere Khan]

RapidBike Easy has just been delivered. I'll try to install and let you know my impressions.

 

[Shere Khan]

Got myself one free hour on sunday evening and took the chance to install the tuner.

Installation was so easy I didn't even break a sweat, I had already set the tuner at the provided values by DimSport (which would be setting 6 & fuel ratio +2 for both the Euro V Himalayan 2021-2023 and many model of Piaggio and Vespa 125, 150 and 300) so I just had to do the wirings.

It could be worth to mention the tuner seems to be the same for all the bikes, since it's up to the owner to set the trimmers for his ride. The many kit you'll find around only add the specific connectors to fit the same tuner to that specific motorcycle. So, if by any chance you happen to find a second hand RapidBike Easy, you could grab it for cheap and then go to DimSport to buy just the specific connectors you'll be missing.

After being connected, the tuner should green light when you give power to cockpit, then start blinking green after few minutes you run the engine. At that point you can screw the tuner rear cover on and find the better place to store it on the bike.

And that was the hardest part. First time I've been pulling the fuel tank (not hard at all, but that left me with some questions about things I've whitnessed or not under the tank) and connectors are not that long actually: I didn't make it to go around the tank rubber mounts down to under the rider seat.

In the end the tuner is not huge, I managed to store it under the tank above the throttle body. Unfortunately I couldn't test it on the road yet, and I'll be away from home all week. At idle it sounded to be more... tiger-ish

 

[Dool]

So the connection was made to the O2 sensor only?

 

[Shere Khan]

So the connection was made to the O2 sensor only?

Yeah, it goes straight in between the existing wirings

 

[Dool]

Interesting, keep us informed.

 

[Shere Khan]

Had a short ride to the sea with my wife, just 50 km but you can tell already at idle and low revs the bike is really smoothed out a lot.

It seems before installing the RapidBike I suffered hiccups when playing with the clutch in traffic. I thought it was the bike personality, but since this roughness is now gone, I understand it was just bad tuned or poor fueling.

Also had no stalling, they were rare before already, so I might need a little more test time before calling these gone too. Environmental temperature is raising too, so it would be better to test in cold winter. At one time in traffic the revs dropped a lot but the engine managed to stay alive, so it's already a confidence inspiring result.