I looked it up as well. Apparently the VFR1200 76 degree V4 honda is specifically designed to have low vibration due to aspects of the crank and firing order and not require a balance shaft. Maybe they don't like them on roadbikes.The aprilia rsv4 apparently does have a (fairly small) balance shaft.
Honda's RC213V Engine
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I looked it up as well. Apparently the VFR1200 76 degree V4 honda is specifically designed to have low vibration due to aspects of the crank and firing order and not require a balance shaft. Maybe they don't like them on roadbikes.The aprilia rsv4 apparently does have a (fairly small) balance shaft.
Joined Feb 2009
3K Posts | 2+
siebenbürgen süße heimat!
The RS125 chassis is probably not as good as the RS250 - that was a V2 in the original road bike. From memory, the RS125 is built very small and light. Not much meat for taking big torque and braking forces. Whereas the RS250 is a great chassis - very strong, GP-level brake mounts, etc.
The RS125 would only make a good ride if it was for a Pedrosa-sized rider
Cagiva make a 525 single Mito - that and the Raptor 125 seems to be the only thing they are making nowadays...
i'd think the rs125 could easily handle 50hp.
the 525 mito is a 125cc 2-stroke and if my information is correct you can't even get the whole 30hp out of them by de-restricting the exhaust,only 15hp.
the raptor is just the mito with higher handlebars and no fairing
Joined Apr 2011
636 Posts | 26+
Gold Coast
Yep the rs125 can handle that. You can stick big bore rotax's in em without too many hassles. People have also attempted to do cr500 conversions with them, but that's a whole new kettle of fish cause the output shaft is on the opposite side to the euro donks.
Rs125's are ....... wicked bikes!
Joined Jul 2006
11K Posts | 291+
Texas
Its a ....... Honda.. Honda ....... rules all.. It does not matter if its a V or an inline a twin or an opposed as long as its a Honda... When will yall learn
Joined Jul 2011
1K Posts | 872+
Dont Know
That settles it, Honda are anti-balance shaft. The V5 Honda was described as employing the 5th cylinder specifically to avoid a balance shaft. Kroppo might be right about the RC213 after all. The photo shown earlier was the 800 engine I assume. I will bet a V4 that the sport bike engine will be 90 degrees. Like this:
Anyone owned or ridden an old VF1000? I heard they had a lot of problems with cam gears siezing.
http://vfreek.tripod.com/id11.html
Cost and fuel consumption... balance shafts require a whole lot more hardware and it all impacts on the bottom line.
My mistake - I thought they had chucked a 500cc 4-T into them.
As to the 125, it isn't so much the engine power (although the swingarm is mighty skinny!) as much as the suspension and brakes. I ave 'overpowered' a few bikes over the years and while the frames are relatively straightforward, it is the suspension and brakes that aren't up to the task.
That settles it, Honda are anti-balance shaft. The V5 Honda was described as employing the 5th cylinder specifically to avoid a balance shaft. Kroppo might be right about the RC213 after all. The photo shown earlier was the 800 engine I assume. I will bet a V4 that the sport bike engine will be 90 degrees. Like this:
Anyone owned or ridden an old VF1000? I heard they had a lot of problems with cam gears siezing.
http://vfreek.tripod.com/id11.html
Way back when the first ones came out there was a problem with pitting cams, jamming gears, etc. Solved very quickly. I am not a fan of any Honda V, but they were pretty damned nice.
How 'bout RS250 with 500cc smoker? 130hp, 65 ft pounds...
That is the one
Its a ....... Honda.. Honda ....... rules all.. It does not matter if its a V or an inline a twin or an opposed as long as its a Honda... When will yall learn
In 40+ years of riding and around 100 bikes owned, only one Honda. It was a good one, I'll grant you, but it was bought on price alone... I wanted a cheap dirt bike for the 5 acre block.
That was pretty much my assumption from the start of the discussion, with durability in view of the increased mechanical complexity probably an issue as well. I guess the the aprilia rsv4 is a more expensive niche product and aprilia are not expected to meet honda standards of durability/reliability etc.
Previous large-capacity Aprilia engines were either made by Rotax or made under contract by Rotax. The build quality was always top-notch. Now Aprilia has their own designs and production but they seem to have continued the high-quality design ethos.
They have had a few issues - the maintenance requirements are stringent, which has caused a bit of a bad rep for their 450/550 V-twin in the US when people treated them like Japanese engines - i.e, never maintained them. But I have found them to be pretty damned good - I am on my 6th Aprilia now and apart from a self-destructed sprague clutch on my Futura (cheap buy - I knew the previous owner was an abuser
) they have been great on reliability and performance. Easily tuned as well.
The V4 is rumoured (I haven't found corroboration from Aprilia) to have been the basis for a GP engine in the 990 era so the chance that the engineering is of a higher standard than the road-oriented Honda is probably quite good.
I think the market segments are different. People expect trouble-free operation from Honda, so the design is based around surviving abuse, whereas Aprilia expect their owners to maintain them to the recommended service intervals by trained technicians (like BMW in that regard). They have been sticklers on warranty - if you haven't got the right stamps, you are on your own.
To work on, they are like chalk and cheese - Aprilias are easy - getting to major components is a breeze compared to something like a VF800, where you need to just about disassemble the whole bike to get at stuff.
That being said, I have never had my hands dirty on the Aprilia V4, but I know plenty of people that have and the rep seems to be the same.
They have had a few issues - the maintenance requirements are stringent, which has caused a bit of a bad rep for their 450/550 V-twin in the US when people treated them like Japanese engines - i.e, never maintained them. But I have found them to be pretty damned good - I am on my 6th Aprilia now and apart from a self-destructed sprague clutch on my Futura (cheap buy - I knew the previous owner was an abuser
The V4 is rumoured (I haven't found corroboration from Aprilia) to have been the basis for a GP engine in the 990 era so the chance that the engineering is of a higher standard than the road-oriented Honda is probably quite good.
I think the market segments are different. People expect trouble-free operation from Honda, so the design is based around surviving abuse, whereas Aprilia expect their owners to maintain them to the recommended service intervals by trained technicians (like BMW in that regard). They have been sticklers on warranty - if you haven't got the right stamps, you are on your own.
To work on, they are like chalk and cheese - Aprilias are easy - getting to major components is a breeze compared to something like a VF800, where you need to just about disassemble the whole bike to get at stuff.
That being said, I have never had my hands dirty on the Aprilia V4, but I know plenty of people that have and the rep seems to be the same.
Previous large-capacity Aprilia engines were either made by Rotax or made under contract by Rotax. The build quality was always top-notch. Now Aprilia has their own designs and production but they seem to have continued the high-quality design ethos.
They have had a few issues - the maintenance requirements are stringent, which has caused a bit of a bad rep for their 450/550 V-twin in the US when people treated them like Japanese engines - i.e, never maintained them. But I have found them to be pretty damned good - I am on my 6th Aprilia now and apart from a self-destructed sprague clutch on my Futura (cheap buy - I knew the previous owner was an abuser) they have been great on reliability and performance. Easily tuned as well.
The V4 is rumoured (I haven't found corroboration from Aprilia) to have been the basis for a GP engine in the 990 era so the chance that the engineering is of a higher standard than the road-oriented Honda is probably quite good.
I think the market segments are different. People expect trouble-free operation from Honda, so the design is based around surviving abuse, whereas Aprilia expect their owners to maintain them to the recommended service intervals by trained technicians (like BMW in that regard). They have been sticklers on warranty - if you haven't got the right stamps, you are on your own.
To work on, they are like chalk and cheese - Aprilias are easy - getting to major components is a breeze compared to something like a VF800, where you need to just about disassemble the whole bike to get at stuff.
That being said, I have never had my hands dirty on the Aprilia V4, but I know plenty of people that have and the rep seems to be the same.
I love the aprilias, particularly like the look of the naked bike of which I have only seen photos.
The Tuono? Great bike - adjustable, customisable... but with the same power as the RSVR!
I turned a beat-up RSV Mille to a Tuono with a change of a few parts and a new headlight fitting. Insurance companies write off bikes with fairing damage - pick them up for a song. A few hundred in parts and you're laughing
I turned a beat-up RSV Mille to a Tuono with a change of a few parts and a new headlight fitting. Insurance companies write off bikes with fairing damage - pick them up for a song. A few hundred in parts and you're laughing
Even funnier, those cocks in the bleachers then promptly tapping the space-bar too often, whilst critiquing the ................
Thought your gramma might need a lift.
I am being told that Spanish magazine Solo Moto and Italian mag MotoSprint are to publish an article by Neil Spalding, in which he confirms that the Honda is a V90...
Joined Oct 2012
3K Posts | 725+
Crab Key
And the same bulk and layout as the Duke?
Will he do a scale overlay of the two engines aligned at the crank centreline? With locations of ancilliaries? Of tank and shock locations?
I don't mind Neil but he depends on a certain indulgence from the factories... Actually I do mind Spalding. I bought his book and gave it away a day later. Graphics of tyres with 'sparks' showing combustion points...A laughable 'inertia torque' graph that utterly confused him... He can build a duke twin, but the engineering analysis is based on press releases and school level physics.
Will he do a scale overlay of the two engines aligned at the crank centreline? With locations of ancilliaries? Of tank and shock locations?
I don't mind Neil but he depends on a certain indulgence from the factories... Actually I do mind Spalding. I bought his book and gave it away a day later. Graphics of tyres with 'sparks' showing combustion points...A laughable 'inertia torque' graph that utterly confused him... He can build a duke twin, but the engineering analysis is based on press releases and school level physics.
