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Unsure of cb650f

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nicomallourid...
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Joined: 27 Jan 2020
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PostPosted: 00:14 - 27 Jan 2020    Post subject: Unsure of cb650f Reply with quote
Hey guys so I'll just quickly plan out the situation, I am currently riding a '17 Yamaha r25 and have been for the past 8 months and managed to get 10k km on it. I absolutely love it and love pushing it when I get the chance to go out and do some twisties. I also did 10k on my gsxr125 but not counting that as experience as it is a very small motorcycle. My friend has a '07 gsr600 and I fell in love with it from all aspects. But its a bit out of my range as its too powerful for me. He advises me to go for the Kawasaki er6n but I don't really want that as I don't like the looks nor the fact that it's a 2. I want a heavy 4 cylinder that's not so powerful so I can get used to using a big bike, and also do twisties (if its light it'll just be too unstable in the corners). He keeps on saying that the kawa has a torque restrictor and it'll be an easier jump than a jump from a 2 cylinder 250 to an inline 4. Thinking of a cb650f as its heavy and also not too powerful, but I'm not sure so I thought id get some help. Thank you in advance.
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Sister Sledge
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PostPosted: 08:06 - 27 Jan 2020    Post subject: Reply with quote
Buy a 600 rolling chasis complete with log book. Drop in a 125 engine and pack it with lead and hey presto!

Two things. Lighter bike doesn't mean unstable otherwise GP bikes would be made of lead and secondly, it's you who makes the thing move. You know - that twisty handlebar thing? Twist it less and it's not gonna go as fast.
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trevor saxe-coburg-gotha
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PostPosted: 11:12 - 27 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
nicomallourides wrote:
(if its light it'll just be too unstable in the corners


https://media.giphy.com/media/3ov9jCGzR1JtD8Hlni/giphy.gif
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Teflon-Mike
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Joined: 01 Jun 2010
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PostPosted: 11:38 - 27 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
nicomallourides wrote:
Location: Turkey
Occupation: Student

Do these two statements not demand a tincy bit of empathy?
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WreckTangle
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Joined: 21 Oct 2019
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PostPosted: 15:14 - 27 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
go with the cb650f

why? it is the bike that I my bike training school made me use to get my full license. My instructor says (I have to go by what he said, as I don't have the full experience to compare this to other bikes) the bike type is easy handle and was his best choice for learners, as it is more forgiving in corners than others.
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chickenstrip
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PostPosted: 16:29 - 27 Jan 2020    Post subject: Reply with quote
I think if you like the GSR, then that's what you should get. It's not going to be a monster that will want to bite your head off every time you touch the throttle. And as Sister Sledge says, the throttle is a control, as in, you control how fast the the thing goes Wink
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Sister Sledge
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PostPosted: 09:04 - 28 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
Teflon-Mike wrote:
nicomallourides wrote:
Location: Turkey
Occupation: Student

Do these two statements not demand a tincy bit of empathy?


Disappointed you didn't mention condoms and buses Tef..
I must have been in quite a mood when I wrote that yesterday - things were going badly at this end!
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nicomallourid...
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Joined: 27 Jan 2020
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PostPosted: 13:42 - 29 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
trevor saxe-coburg-gotha wrote:
nicomallourides wrote:
(if its light it'll just be too unstable in the corners


https://media.giphy.com/media/3ov9jCGzR1JtD8Hlni/giphy.gif


what i mean is that another bike in the same class, the mt07, is a light and powerful naked motorcycle therefor its unstable in the corners.
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nicomallourid...
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PostPosted: 13:44 - 29 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
WreckTangle wrote:
go with the cb650f

why? it is the bike that I my bike training school made me use to get my full license. My instructor says (I have to go by what he said, as I don't have the full experience to compare this to other bikes) the bike type is easy handle and was his best choice for learners, as it is more forgiving in corners than others.


yeah i figured I'd go with the cbf. Most people like it and have nice things to say about it. its a well-balanced cb650f, beginner big bike and so on. Thank you
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Nobby the Bastard
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Joined: 16 Aug 2013
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PostPosted: 14:40 - 29 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
nicomallourides wrote:

what i mean is that another bike in the same class, the mt07, is a light and powerful naked motorcycle therefor its unstable in the corners.


Are you fucking kidding? Just because it has quicker steering doesn't make it unstable and is more down to the steering geometry than the weight anyway.

No modern bike is badly behaved in the corners and you really have to upset them in order for them not to feel like they are on rails.

You obviously don't know what a speed wobble is....
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chickenstrip
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PostPosted: 15:16 - 29 Jan 2020    Post subject: Reply with quote
Cars are usually quite stable in corners. That's it. OP should get a car.

Ffs, stop being such a damn pussy and buy the bike you really want.
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Easy-X
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PostPosted: 15:56 - 29 Jan 2020    Post subject: Reply with quote
We might be misunderstanding the intention of "unstable" Thinking

A 100% stable bike would be very hard to get round a corner at all! A long wheel-base bike is great going in straight lines - take a look at drag bikes - whereas a push-bike has a very small wheel-base and (relatively speaking) will tip over very easily.

I still recall when the Idea switched on for jet fighters. I can't remember when it was but they'd always been "flight stable" (as in if you left the stick and the plane was flying straight and level it would pretty much stay that way indefinitely) and then the designers realised if they built a "flight unstable" the plane could perform much tighter manoeuvres. A bitch to fly though but it dovetailed nicely with fly-by-wire and anti-red/black-out pressure suits.

Anyhoo, a certain amount of "unstable behaviour" is desirable from an Applied Mathematics viewpoint.

<addendum> Oh year, just buy the Honda. "Nobody every got fired from buying IBM" as they used to say. Any bike from any of the big-four jap companies is a solid, reliable proposition these days.
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Last edited by Easy-X on 15:59 - 29 Jan 2020; edited 1 time in total
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trevor saxe-coburg-gotha
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Joined: 22 Nov 2012
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PostPosted: 15:58 - 29 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
nicomallourides wrote:
what i mean is that another bike in the same class, the mt07, is a light and powerful naked motorcycle therefor its unstable in the corners.


in general the more weight you have, the less the bike will want to (i.e. be able to) go around a corner - it will be more difficult for it to deviate from a straight line; so your steering inputs will need more consideration - you'll probably need to be smoother, to anticipate and plan for the corner more carefully, and arguably to use more counter-steering. You'll also need to lose more speed, so probably also use the brakes more than you would on lighter machinery.

But yes - it is true; a heavier bike may well be more stable in corners. But it's correspondingly slower, and also more difficult to control.

A lighter bike will not necessarily be "unstable" - it will be *less* stable. And it's worth noting that according to some specification figures, the 07 is some 40kg lighter than the cb650f. If accurate, that's a significant amount. The most important thing to focus on, though, is that neither bike could usefully be considered "unstable" when cornering. They'll both be well-constructed and properly tested. Speaking personally, and given the roads I like to ride on (narrower roads with more corners), I think if I rode both bikes I might well end up preferring the 07.

If I compare two of my current bikes, a zx9r C2 and a 1990s cb500, the former is undoubtedly more stable - everywhere. But if you ask me which I feel more confident on when riding on roads with tight corners, I'll say the cb500 every time. It's not that the zx9r is particularly heavy in the grand scheme of things (less than 200kg) but it's a bit longer, and this combined with the extra weight means it's never going to be as easy to control as the 500.
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chickenstrip
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PostPosted: 16:04 - 29 Jan 2020    Post subject: Reply with quote
Overthink overload.
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nicomallourid...
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Joined: 27 Jan 2020
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PostPosted: 02:44 - 30 Jan 2020    Post subject: Re: Unsure of cb650f Reply with quote
trevor saxe-coburg-gotha wrote:
nicomallourides wrote:
what i mean is that another bike in the same class, the mt07, is a light and powerful naked motorcycle therefor its unstable in the corners.


in general the more weight you have, the less the bike will want to (i.e. be able to) go around a corner - it will be more difficult for it to deviate from a straight line; so your steering inputs will need more consideration - you'll probably need to be smoother, to anticipate and plan for the corner more carefully, and arguably to use more counter-steering. You'll also need to lose more speed, so probably also use the brakes more than you would on lighter machinery.

But yes - it is true; a heavier bike may well be more stable in corners. But it's correspondingly slower, and also more difficult to control.

A lighter bike will not necessarily be "unstable" - it will be *less* stable. And it's worth noting that according to some specification figures, the 07 is some 40kg lighter than the cb650f. If accurate, that's a significant amount. The most important thing to focus on, though, is that neither bike could usefully be considered "unstable" when cornering. They'll both be well-constructed and properly tested. Speaking personally, and given the roads I like to ride on (narrower roads with more corners), I think if I rode both bikes I might well end up preferring the 07.

If I compare two of my current bikes, a zx9r C2 and a 1990s cb500, the former is undoubtedly more stable - everywhere. But if you ask me which I feel more confident on when riding on roads with tight corners, I'll say the cb500 every time. It's not that the zx9r is particularly heavy in the grand scheme of things (less than 200kg) but it's a bit longer, and this combined with the extra weight means it's never going to be as easy to control as the 500.


Well thank you for replying with this kind attitude, it really means a lot to explain rather than just screaming at a person. I agree with the things you say but as you can see I am pretty new to the motorcycle world and I'll probably get the hang of everything one at a time haha. Thanks for the reply again Very Happy
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