[tsrobertsonoc]

So I'm curious when I flash my r7 is that the only restriction the US version has? Or are there others?

 

[EDS]

A flash should remove the restrictions but it doesn't necessarily have to. The exhaust cam in the later MT07 models and R7 was changed and possibly a restriction if you're going to make modifications to improve flow.

 

[M.Hausknecht]

There is nothing that limits your ability to open the throttle butterflies fully, if that is what you mean. There are still "restrictions" in the intake and exhaust systems, but they are there to limit noise, and optimize low and mid-range torque which is why some folks install freer flowing units. For example, the snorkle to the airbox is there to limit noise from the intake side of things, and removing it will allow the motor to breathe a little better and, with a flash, to develop more power.

@EDS , from that perspective, there are many "restrictions". They are why we port heads, bore throttle-bodies, install higher lift and duration cams, install higher compression ratio pistons, install freer flowing intake and exhaust systems, and use stand-alone, after-market ecus. But I'm thinking that isn't what the OP is asking about.

 

[EDS]

IIRC, Hord got the most power with an intake cam change but kept the stock exhaust cam. Just sayin' the exhaust cam might be a more limiting factor like the older water-cooled Bonneville twins where it was so mild that no other mods made a difference in flow. It doesn't appear that the R7 cam was neutered to the same degree but it would be interesting to know how much if any.

 

[M.Hausknecht]

The intake side of things is far more limiting with these motors than the exhaust side. I've got more than 90 rwhp with my CP2 and it required a lot more than swapping an exhaust camshaft to get there.

 

[tsrobertsonoc]

The intake side of things is far more limiting with these motors than the exhaust side. I've got more than 90 rwhp with my CP2 and it required a lot more than swapping an exhaust camshaft to get there.

That's what I'm looking for, if I can get the r7 up there it would be nice. I love the bike, I just want a little bit more and maybe I can't have that. The bottom end as we all know is amazing, for me once I get the 70ish it isn't as noticeable obviously, here in so cal everyone's going 85 so over taking on highway is weird

 

[M.Hausknecht]

Such a motor isn't really viable on the street. If you can't build a motor yourself, expect to pay at least $7000 for 90 rwhp, and irrespective of who builds it, don't expect more than 1000-1500 miles out of it before power drops off. Bored throttle bodies, fully ported head, higher lift and longer duration, timed camshafts, Hordpower intake or similar, 95-100 oct fuel, well-engineered pipe, and dyno tuning of fuel and spark maps. Lightened internals, 13:1 pistons, and Carrillo rods will get you better throttle response and a few more safe HP.

Keep in mind, on a reliable and calibrated dyno, these motors only get 66-68 stock at the rear wheel on pump gas. A bump to 72, achievable with a good pipe, flash, and snorkle delete, is a 10% increase and quite respectable with no decrease in reliability. A Hordpower intake seems to be worth another 2-3 HP, maybe.

 

[EDS]

You have to change internals to make significant power but those looking for small gains with external mods only, might not benefit as much with the newer exhaust cam.

If you want a 90hp CP2 streetbike, maybe wait and see what Honda does. Their new 750 (not available everywhere) is supposed to weight the same and have a greater fuel capacity.

 

[manshrew]

There is nothing that limits your ability to open the throttle butterflies fully, if that is what you mean.

This. People think that flashing the ECU gets rid of some weird restrictions that exist somewhere for the R7. It's just not the case.
Of course the fuel maps aren't optimised for power, and yes they do have some weird fuel cuts, but it's not like the restricted SV650 versions that only allow the STVs to open up 40%.

 

[EDS]

The R7 isn't TBW so it's obvious that the ECU can't limit how far the throttle opens but if you want to rev the engine higher, a flash could help with that.

 

[manshrew]

The R7 isn't TBW so it's obvious that the ECU can't limit how far the throttle opens but if you want to rev the engine higher, a flash could help with that.

The SV isn't either, but you can limit the secondaries if you want to.

 

[EDS]

The R7 doesn't have secondaries. It would need TBW to restrict the throttle.

 

[manshrew]

The R7 doesn't have secondaries.

Yeah, I know.

 

[M.Hausknecht]

The R7 doesn't have secondaries. It would need TBW to restrict the throttle.

Uh no, The New Zealand version of an R7, as an example,is physically limited to 2/3s throttle.

 

[uncle greg]

Uh no, The New Zealand version of an R7, as an example,is physically limited to 2/3s throttle.

In Australia and new Zealand you can get both model's

 

[M.Hausknecht]

In Australia and new Zealand you can get both model's

True, but in the context I was addressing, not material. I was addressing the assertion that no R7s have throttle restrictions because they aren't throttle-by-wire. Some do, right from Yamaha and many don't.

 

[uncle greg]

True, but in the context I was addressing, not material. I was addressing the assertion that no R7s have throttle restrictions because they aren't throttle-by-wire. Some do, right from Yamaha and many don't.

Yeah but you made it sound like you can only get the restricted model

 

[M.Hausknecht]

Yeah but you made it sound like you can only get the restricted model

You're right; not what I intended. Thanks for clearing it up for posterity.

 

[EDS]

Uh no, The New Zealand version of an R7, as an example,is physically limited to 2/3s throttle.

We're talking about electronically restricted throttles, not mechanical type that you mention. Those are easily removed.