Performance

[latts650s]

hi all i need some help my sv seems to lack in performance since i got it last year (k5 balck svs)it does'nt seem to be pullingas fast through the gears as i found out today up against a suzuki gsxr 600.i got a ccc can and i have just taken of the power commander,the chain is at the right tension and the sprokects r fine.so does anyone has any ideas.

[jonboy]

Maybe you're simply used to it and expect it to go faster than it actually does? In a straight line (once you get past 60) you'll never keep up with a gixxer 600.


.

[fizzwheel]

You'll never keep up with a GSXR ridden by somebody who knows what they are doing. Especially not in a straight line.

[Toypop]

This is exactly what I was saying back in Feb.

The gears seemed to long and it felt too underpowered. Only one solution for that unfortunately. Just hope you have a couple of grand spare.

[northwind]

Hardly... If the gears feel too long, drop the gearing, it costs about £40. £100 if you do it right and replace both sprockets and the chain.

No tuning mod that's practical on the road gets you up to SS600 power, of course- but that seems to miss the point.

[jonboy]

Hardly... If the gears feel too long, drop the gearing, it costs about £40. £100 if you do it right and replace both sprockets and the chain.

Exactly. The gearing's easy to fix to suit your own personal tastes.


.

[Toypop]

But you all said it wasn't over-geared back when I was trying to work out what to do! Everyone said thats just how it is and you have to use the mid range!

I could have just put a 47 on the rear and changed the can and that would have saved me a fortune and I wouldnt be sat here now having driven to work because I am screaming in pain from my wrists!

[jonboy]

Well I didn't I think you'll find, and anyway what you might call over-gearing other folk might consider to be fine, in fact there are some SV riders on this forum that have actually raised the gearing slightly, so it's purely down to personal preference. If you want lower gearing on the SV it's a very simple matter to achieve it.

If you want 30% more power than the SV is giving then it's time to change your bike which is where your two grand comes in to the picture.

Horses for courses.


.

[northwind]

But you all said it wasn't over-geared back when I was trying to work out what to do! Everyone said thats just how it is and you have to use the mid range!

Don't think so.

[Blue_SV650S]

Dropping the SV 1 tooth on the front (or going up 3 on the rear) is a great little mod and makes it feel that little bit more sprightly and easier to pull away etc. But as has been said, you are never going to keep up with a 600 that is being nailed. A healthy SV has what, 70hp at the wheel?? The latest generation 600s have about 110-115 at the wheel out of the crate!!! Nuff said!!

[Viney]

You'll never keep up with a GSXR ridden by somebody who knows what they are doing. Especially not in a straight line. Not you then ;)

[diamond]

You'll never keep up with a GSXR ridden by somebody who knows what they are doing. Especially not in a straight line. Not you then ;)

Unfortunatly, despite him riding like a big girl, that bike way out accelerates and out brakes me on my sv. And he's still only running it in. :oops:

[Viney]

You'll never keep up with a GSXR ridden by somebody who knows what they are doing. Especially not in a straight line. Not you then ;)

Unfortunatly, despite him riding like a big girl, that bike way out accelerates and out brakes me on my sv. And he's still only running it in. :oops:

Liz, whats happening...have you got a flat tyre???

[fizzwheel]

But you all said it wasn't over-geared back when I was trying to work out what to do! Everyone said thats just how it is and you have to use the mid range!

Thats because its not :wink:

You cannot compare the straightline performance of the SV with a SS600 IL4 with 30 maybe 40 more BHP than the SV has.

[fizzwheel]

You'll never keep up with a GSXR ridden by somebody who knows what they are doing. Especially not in a straight line. Not you then ;)

Unfortunatly, despite him riding like a big girl, that bike way out accelerates and out brakes me on my sv. And he's still only running it in. :oops:

Liz, whats happening...have you got a flat tyre???

Nah shes got a new tyre on the rear so she's scrubbing it in still :wink:

[diamond]

Liz, whats happening...have you got a flat tyre???

No but it is a new tyre so i'm still scrubbing it in :oops: :lol:




Anyway i catch him on the straights, it's only going into and coming out of the corners thats the problem.
I always get away from lights before him cos he always blips the throttle twice before he pulls away it loses him valuable secounds :lol:

[latts650s]

thanks 4 the replys so it seems the best way would be to change the gearing.so what sprockets do i need 4 better pulling away.as i have found u have to use the mid range to move the bike if i want to get pass someone.

[Blue_SV650S]

thanks 4 the replys so it seems the best way would be to change the gearing.so what sprockets do i need 4 better pulling away.as i have found u have to use the mid range to move the bike if i want to get pass someone.

I have changed to a 14t front (stock 44t rear).

This is a post I made a while back, it might be of interest to you :)

http://forums.sv650.org/viewtopic.php?p=507700&highlight=#507700


.

[latts650s]

how easy is it changing the sprockets or could i get someone to do it

[GSXR Carlos]

thanks 4 the replys so it seems the best way would be to change the gearing.so what sprockets do i need 4 better pulling away.as i have found u have to use the mid range to move the bike if i want to get pass someone.

I have changed to a 14t front (stock 44t rear).

This is a post I made a while back, it might be of interest to you :)

http://forums.sv650.org/viewtopic.php?p=507700&highlight=#507700


.

hey blue, i'm thinking of doing this, much loss in fuel economy, ie how much did you get standards and then after the change?

[Blue_SV650S]

hey blue, i'm thinking of doing this, much loss in fuel economy, ie how much did you get standards and then after the change?

To be honest I changed to 14t in the first week I had the bike as I felt 1st was too tall stock (15t) and wanted to get the 15t off ASAP!! :D So I didn’t really ride it enough with 15t to measure MPG.

My commute is mainly through town, so unlike a motorway rider, the 1t less might actually increase my economy??

Anyway I tend to get about 35mpg commuting now, but not sure how much use that figure is going to be to you?

[GSXR Carlos]

silly question, how do you guys work out mpg? is it simple?

[jonboy]

Zero the trip meter, fill tank to the brim (though leave bike on the stand and not upright), then when you've used nearly all the tank, refill to exactly the same level and note the precise amount of fuel you've put in (get a receipt and it'll be on there). Note miles on trip meter.

Divide the number of litres by 4.55 (to give you gallons), then divide the number of miles by this figure.

Why leave the bike on its stand as you fill up? Very simply if you keep the bike upright (and therefore fill it to maximum capacity) as soon as you go round a few bends some of the fuel will slop out the top of the tank into the overflow and therefore make the accuracy slightly out (how significant this is I'm none too sure).


.

[Blue_SV650S]

Zero the trip meter, fill tank to the brim (though leave bike on the stand and not upright), then when you've used nearly all the tank, refill to exactly the same level and note the precise amount of fuel you've put in (get a receipt and it'll be on there). Note miles on trip meter.

Multiply the number of litres by 4.55 (to give you gallons), then divide the number of miles by this figure.

Why leave the bike on its stand as you fill up? Very simply if you keep the bike upright (and therefore fill it to maximum capacity) as soon as you go round a few bends some of the fuel will slop out the top of the tank into the overflow and therefore make the accuracy slightly out (how significant this is I'm none too sure).


.

What he said, but 1l is 0.2199692 gallons (UK)

Basically you need to know 2 things, litres of fuel used and miles travelled. Best way is to fill tank to full, reset trip counter, then travel … then fill to full again, noting litres purchased and miles covered.

Now the maths:-

So if you bought 10l fuel, that is 2.199692 gallons.

If you covered 100 miles, you want to do 100/2.199692 giving you -> 45.46mpg

[jonboy]

It's actually 0.2199687986 :wink: . Oh and my conversion figure was of course rounded up, so those who are in a pedantic mood the exact figure is 4.546099294.

.

[Valman]

...Multiply the number of litres by 4.55 (to give you gallons), then divide the number of miles by this figure....


.

I think you meant DIVIDE :wink: the number of litres by 4.55 to give you the number of gallons. :lol:

i.e. if you filled up 10 litres and you covered 100 miles then you would do the following:
10 litres / 4.55 = 2.197... gallons of fuel used.
100 miles / 2.197.. gallons = 45.5 miles per gallon

[jonboy]

I think you meant DIVIDE :wink: the number of litres by 4.55 to give you the number of gallons. :lol:

Erm... (scratches head) yes that's exactly what I meant :lol: (edits post).


.

[Blue_SV650S]

It's actually 0.2199687986 :wink: . Oh and my conversion figure was of course rounded up, so those who are in a pedantic mood the exact figure is 4.546099294.

.

Dude, to get Gallons (UK) you need to MULTIPLY litres by 0.2199687986 or DIVIDE litres by 4.546099294 …

In your initial post you said MULTIPLY by 4.546099294. i.e. 10L*4.54… = 45.4 gallons … that is incorrect. I knew what you meant, but others might not?

I tried not to confuse by giving the proper MULTIPLY value … but alas … failed again :D

[jonboy]

I like to set these little tests for forum members, just to keep you on your toes :lol: .


.

[GSXR Carlos]

lol, thanks you two :wink:

[GSXR Carlos]

since this has turned into a mpg topic :oops:

i'm getting about 40 mpg ( at a guess before doing exactly what you lot told me)

with a mix of fast road and motorway riding, is this acceptable?

[Valman]

since this has turned into a mpg topic :oops:

i'm getting about 34 mpg ( at a guess before doing exactly what you lot told me)

with a mix of fast road and motorway riding, is this acceptable?

I only get around 30 mpg when commuting in London, so I would say it's fine, but I'm sure others here will say they're getting a much better figure than that.

[Valman]

since this has turned into a mpg topic :oops:

i'm getting about 40 mpg ( at a guess before doing exactly what you lot told me)

with a mix of fast road and motorway riding, is this acceptable?
Thanks for editing your mpg figure, now 30 mpg looks a lot worse than it did before. :cry:

[GSXR Carlos]

i realised i'd worked it based on 100 miles, that's when my light sometimes comes on, i normally get about 120 miles out of a complete tank, but don't often fill up when i'm empty anymore, tend to do it on my way to/from work

[jonboy]

I tend to get little more than 30-35 regardless of the journey. In fact after filling my SV right up (and after dashing down the A1M to Soho at "interesting" speeds) the flahing light came on at only 80 miles :shock: :lol: .


.