2017 390RR-S Review

[nevermind]

just give me a 2.5 gallon tank like the 2 strokes have. still skinny, and gets me how far i need to get for races!! i'm probably the only one though that wants this.

You're not and I don't see any good reason why Beta went 1/2 gallon smaller. ARGH!!!!!!!!!!!!!

[Showtime477]

I think I remember somebody on here fitting the 2.5 gallon tank on their 4 stroke. I believe there is some heating a small amount of reshaping involved, but doable. I think it was in the for sale forum about 1 year ago.

[mrquick68]

I think I remember somebody on here fitting the 2.5 gallon tank on their 4 stroke. I believe there is some heating a small amount of reshaping involved, but doable. I think it was in the for sale forum about 1 year ago.

Even for an EFI bike? Hmmmm. I'd love this.

[mrquick68]

One more post on the 390 RR on this thread, and then i'll leave it alone. I raced the 390 for the first time yesterday. Desert race w/ some MX sections. Raced the Vet B class. It was pretty stacked, 20+ racers. I'm a woods guy, this was my first desert race. The 390 is a runner!!! It never once thought I could use more power. It pulls from low in the R's and kept pulling when I asked it too - super smooth. Mine is uncorked so its probably a bit faster than stock, but I have zero complaints, even in the soft sandy sections. It will loft the front tire on command! Ended up 4th, which I'm pretty happy with given it being my first race in this format. Did just under 60 miles in Hare Scramble. I can barely walk today.

[twowheels]

I think I remember somebody on here fitting the 2.5 gallon tank on their 4 stroke. I believe there is some heating a small amount of reshaping involved, but doable. I think it was in the for sale forum about 1 year ago.

The 2.5 tank could be persuaded to fit onto the 4Ts, but these are for carbureted bikes only (petcock fitting, but no accomodation for fuel pumps)

[Beta Jockey]

One more post on the 390 RR on this thread, and then i'll leave it alone. I raced the 390 for the first time yesterday. Desert race w/ some MX sections. Raced the Vet B class. It was pretty stacked, 20+ racers. I'm a woods guy, this was my first desert race. The 390 is a runner!!! It never once thought I could use more power. It pulls from low in the R's and kept pulling when I asked it too - super smooth. Mine is uncorked so its probably a bit faster than stock, but I have zero complaints, even in the soft sandy sections. It will loft the front tire on command! Ended up 4th, which I'm pretty happy with given it being my first race in this format. Did just under 60 miles in Hare Scramble. I can barely walk today.

Isn't the 390 just a great machine? I'm glad to see others discovering it as I've felt it's been one of the best kept secrets in the dirt bike world ever since I got mine.

[mrquick68]

yes, the 390 is a friggin hoot!

[HRRacing]

Curious, does anyone have any recent 390 ride reports? Dual sport or trails?

[jlamb4483]

I just took ownership my 390 and love it. Just a really easy bike to ride. Even when lugging, it will pull out cleanly, and if you twist more it will start to rip. Very predictable power, it doesn't start revving out unless your on the throttle - for comparison sake, my other bikes were all 2 strokes. A lot more tame at lower rpm when you give quick throttle than the few carb'd 450cc I've ridden - this could be the EFI/power delivery. All these characteristics are reasons why it's so easy to ride.

Coming from a 2010 KTM 200 xcw, I do notice the rotational mass fighting me when quickly leaning back and forth in the tight stuff. But, that's to be expected. I feel like this bike turns betters as far as holding a line and the front not wanting to wash (this could be the 4-stroke wanting to stay upright also). At first, the ergonomics felt a bit awkward, but in no time I was used to it and think i prefer it now. Picking up the bike you notice the weight, but moving it side to side off the side-stand it feels lighter than my 200. Very low center of gravity.

The stock 15/48 gearing is way too tall for single track. I geared down to 13/48 and is much better. I could probably still go to a 49 or 50 in the rear as I'm accustomed to shifting frequently, something I've noticed I don't have to do with this 390.

As far as street riding, I have heavy duty tubes and my wheels aren't balanced, so 50mph was about all I could take. If the tires were balanced I'm sure I could sit at much higher speed comfortably. I'm short and have the seat concepts low seat and the footpegs seem too close for extended street miles. Might be different with the stock seat.

If I didn't live in red/green sticker CA, I would have bought a 300cc 2 stroke. This was, in my opinion, the closest 4-stroke version of that. I don't have a single regret with my purchase.