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2023 V85 Decat

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QuickLime:
I got a decent price on the Mistral headers and I thought the quality seemed the best so I went with them. Before purchasing, I contacted a few of the popular companies to get more info - all three claim to use 304 stainless, and the claimed IDs are listed below. Guareschi never responded to my emails, but their bundle with the UpMap is a solid deal - aside from the tariff's you'll have to pay now.

Mistral - 42mm ID
Agostini - 38mm ID
Arrow - 44mm ID

For the tune itself, I went with the UpMap, which I purchased from AF1. Flashing the bike was easy, and it's hard to describe what an improvement it was on my '23. I ran it with the decat and no tune for probably 6 months, but the tune made it run smoother, cooler, and it's definitely a bit faster - not a ton, but noticeable for sure. The throttle mapping is smoother/less jerky, and I notice much less vibration while riding, especially on the highway - for example: the mirrors are much clearer at 60-75mph on the highway, where before they were often a bit fuzzy from vibrations. If I'd read someone say that before, I would have assumed it was just placebo, I was pretty amazed.

vf84pc:
So you did full mistral with the "up map" did you have the Velocity stack or the twin boost? Is the map you used specific to the Mistral exaust?

QuickLime:

--- Quote from: vf84pc on November 17, 2025, 01:35:02 PM ---So you did full mistral with the "up map" did you have the Velocity stack or the twin boost? Is the map you used specific to the Mistral exaust?

--- End quote ---
I have Mistral headers/decat, stock muffler, and an UpMap with a Zard tune. The V-Twin boost is a cheaper spoof solution than the UpMap which is a true tune and (likely - but impossible to verify) changes fuel mapping and ignition timing. The velocity stack could help a bit, velocity stacks are designed to optimize airspeed at certain RPM ranges, so usually they're tuned for more low end, midrange, top-end, etc - but unless you have fancy variable length stacks (very expensive, but cool) you're making a sacrifice somewhere for a gain elsewhere - but not necessarily a straight "upgrade" if that makes sense.

vf84pc:
Is the hard tune kind of a general tune? Would you use that map with Arrow headers?

QuickLime:

--- Quote from: vf84pc on November 17, 2025, 09:36:32 PM ---Is the hard tune kind of a general tune? Would you use that map with Arrow headers?

--- End quote ---
The Zard tune was developed by Guareschi as far as I'm aware, and yes I would use the same one personally. Any off the shelf tune won't be perfect for all bikes/parts etc. but usually they get close enough. There are a few Zard tune options in the UpMap catalog so it depends which one you want to go for. I believe there are a couple created for people running a decat.

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