View Full Version : Top Speed - what's the ultimate top?
Ok I was looking for some people's experience with tweaking and getting the most in terms of performance out of their SV - what is the top speed recorded for the humble SV on a private road or race track with apprpritate gearing, add ons or whatever.
I think 130 MPH is the top whack for a curvy SV650s
How fast can these babies go? Anyone got any more out of them - and if so how?
No other reason than interest.
Twin renegade cans, tank risers & airkit - indicated 135 on a curvy
diamond
06-05-06, 09:26 AM
Standard K5 except a Remus can and i had an indicated 138.
So 138 Mph indicated. Is that the limit - does anyone race them on the mini twins series or similar and get more - 150mph - ? Is this possible. Higher?
Steve_God
06-05-06, 10:32 AM
140 dead here as standard
Edit: on a K6 Pointy :)
The Basket
06-05-06, 10:33 AM
138 for a standard K5?
I got 126 out of mine and it had about a few mph left.
Bike said 135mph and ride said 125mph...take ur pick. for a pointy K5 S.
Indicated 138 on a curvy here.... rene airkit is only performance change from std
diamond
06-05-06, 10:43 AM
138 for a standard K5?
I got 126 out of mine and it had about a few mph left.
Bike said 135mph and ride said 125mph...take ur pick. for a pointy K5 S.
Bear in mind i'm a 5 ft 3 girl that weighs virtually nothing so i tuck in behind the screen and the bike has to put no real effort in to carry me. And i did say indicated so you can take a few MPH off to get real world speed.
I don't wanna get flamed but i regularily get 120 (indicated) out of my K5 with very little effort so 138 is more than possible and if i remember from previous threads i'm not the only one that has seen this on the clock.
what is the tolerance on the tacho at the top end?
Indicated and actual are usually not the same.
I know the ones we fit to our trucks at work can have upto 5% deviation.
Cheers
The Basket
06-05-06, 11:11 AM
138 indicated may match the 130ish specified in the comix. Also the exhaust could produce extra bhp and some wieght saving.
Top speed of the SV is irrelavant in my view because if you want top speed, you should have bought something faster.
Thanks The Basket, yeh well I have faster bikes, and have had faster bikes and I agree this in not the reason to own an SV. But if the bike were tuned to the utmost, what can this simple bike deliver. I do not mean by over boring it to a 700 or 750 - I mean with the engine in pretty much standard trim - change of gearing - lighter parts - different air filter that kind of thing. Dynojet staging and or a chip for the injected models (is there one even?)
What's the most it can do.
The SV from 0-120 is blinding but past this 120/125 it starts to slow down but ive seen around 135mph on my SV. You could always change the gearing for a better top speed and less acceleration if thats your bag
The Basket
06-05-06, 12:14 PM
Some guys on here race SV's and they can give you a good idea on top spec. About 90bhp is about the limit in keeping with engine reliability...but that is the same as a Hornet 600. An early ZZR1100 can be had for next to nothing if you want juice.
I've said this before but a SV only has good acceleration in comparison to another budget 600. Even a Kwak ZZR600 would toast it. Would need a telescope to see a Hayabusa.
I got 126mph on a trip to Spain but didn't get any further because the fuel light went solid! Fuel went sharpish. Getting stranded without fuel in a foreign country is not my idea of fun. Felt solid and maybe could have gone faster.
Highest I ever seen on my SK5 when it was standard was 139mph indicated. I don't know if it was topped out or not because I had to break at this point to keep back from the other "racers" on the "track"! I haven't tested my modded bike yet for top speed.
northwind
06-05-06, 01:04 PM
I've had an actual 125 from mine (Veypor datalogger, not SV speedo) and it had a way to go, but I chickened out :) The speedo was showing over 135 at that point.
I've had 124 from mine since I put on the Acewell clock (records top speed/revs etc.) and that's extra teeth on the rear cog with no fairing these days. Better than going to the gym. :lol: So SVS's should reach 135 in the right conditions.
When it was faired and std geraing i had indicated 138 on a downhill.
The SV's fly weight and fat torque at low revs means it doesn't disgrace itself up to 80-110, but beyond there it's struggling. Doesn't stop it being fun though. So many other bikes are just stretching their legs at the ton, no wonder they're dull in comparison. How often can you feel the power of your bike when they're all top end rush?
........Haggis awaits the barrage of complaints from the Kwak boys...... :wink:
The Basket
06-05-06, 02:31 PM
I would trade an extra second over 0-100mph over top speed any day of the week.
Changing sprockets will give extra top speed or more umph at the expense of top speed.
The Basket said
"About 90bhp is about the limit in keeping with engine reliability"
now I don't think mine has that - what exactly do you need to do to get this - is there a list of mods that can be applied to get this much from a curvy.
Is 90 BHP also at the sacrifice of road ridablilty. Definately interested in getting the engine up to around 90 BHP if there are no down sides.
Does anyone have a list of engine mods that they have performed and if so what are they?
Thanks
Building a SV to make 90bhp would cost so much that if you treded in your curvey on a good 2nd hand sv1000 it's be a very similar price range.
If you're still not put off by simple mathematics then visit Mr James Holland and he can explain to you how to spend your money.
http://www.jhsracing.co.uk/
The Basket
06-05-06, 03:11 PM
I have an old PB that had a geezer spending big on his SV. Sept 2002.
jhs racing 750cc bi-bore kit. gasflowed head. Stage 3 cams. 41mm Keihin flatslides. M4 stainless racing 'zorst. 1mm oversize inlet valves. R&D racing valve springs. Wiseco pistons. new liners, rings, head gaskets and gudgeon pin.
it gave extra 20 horse...but FFS!!! Buy a Z750 instead!
God knows what this all means...where's Northwind when u need him :D
It was done by the owner of JHS Racing.
SV650Racer
06-05-06, 03:41 PM
Most of us racers disconnect the speedo drive unit. Best i had from a curvy was an indicated 140mph along the A3..naughty yes!!.
Having changed my race injected SV from a 650 to a 700cc bore i can tell the difference in top end. Id reckon on 145 poss more at snett running a 15/44 sprocket setup. The bike feels like it would pull 15/43 easily too.
ThEGr33k
06-05-06, 03:48 PM
If some one has access to GPS then i hear some can give you actual speed, so if anyone can sort this then tell us an "actual" top speed then itll clear somethings up...
CCC can, DB screen and lowers and i saw 135 on the clock on a flat straight but think i may have got a teeny bit more if i did not have to start to slow down. Never tried for top speed again since though
The Basket
06-05-06, 03:51 PM
Surely engine power is half the game?
Wontcha have to do the brakes and suspension too?
I saw the most I have ever seen on my naked curvy's speedo last night and that was an indicated 130mph - lovely 11:00pm cool air probably helped...
northwind
06-05-06, 06:11 PM
God knows what this all means...where's Northwind when u need him :D
Hello!
Mine hits around the 80bhp at the rear wheel mark, without a big spend. £130 for the cams, £300 for the system and dyno work (can't spell carbourettioion), standard bores and compression, £32 for an ignition advancer. It made 78 on YPE's dyno, but was fairly lean- it's not been dynoed again since I fixed that though, but I'd expect it to break 80. I could upgear it if I wanted to make a top-speed beast- it'd easily redline in 6th now with the 45 tooth rear- but I don't see the point, since it's incredibly rare for it to see the scary end of 100ph.
thepyrofish
06-05-06, 06:52 PM
Why is it that the cams off the K3 are meant to give you more power? How are they different I mean.
northwind
06-05-06, 07:42 PM
More lift and duration... Basically they open the valves more and for longer, in the same way that stage 2 race cams would. Likewise, putting a carbed model's intake cams in teh exhaust side of any SV gives a power boost, for the same reasons. It's fairly cheap power, not quite easy to do but not brain surgery either, and because there's no setup/shakedown involved it's much less time consuming than a full system and rejet, as well as cheaper.
Hi Northwind,
Mine is a K2 (2002) model - would K3 cams benefit mine in the way you described? I also looked into the ignition advancer - that's that wood key you need to pull the rotor off to install yes?
I found a site that is sell the keys and the puller - and it seems I could manage that myself (famous last words) as for the cams, not so sure.
If K3 cams are the prefereence - where do you get them from?
Thanks
northwind
07-05-06, 01:41 PM
K3 intakes is what I used, and my own intake cams moved to the exhaust side. Works very well... You could get some of the effect by simply picking up a second set of carbed model intake cams and putting those in the exhaust side- less bonus, but almost certainyl cheaper.
I got the cams new... £135 including the 2 cam chain tensioner gaskets. There's always a chance you can find a blown up K3> engine- the chances of the cams beign damaged from a big-end falure are remote. They seem relatively rare, the bits are in demand, but if you can find one then they should be cheap.
In fact, I've got a couple of broken carbed model engines ehich I've raided for spares, so if you're interested in doing it the cheaper way and using carbed model cams instead of the K3 ones, drop me a line.
As to how hard it is... It's not so much hard as exacting. If you can follow instructions without doing anything daft, it's straightfoward, but you do have to bear in mind that if you mess it up there'll be Consequences :) For instance, there was a guy on SV Rider who got the timing all wrong and bent all his exhaust valves. Another guy managed to drop a cam cover bolt down the cam chain tunnel into the crankcase :roll: These are not things you want to do.
But when i did it, it was all pretty straightfoward. And there's no set-up time, no fiddling about shaking things down, it either works or doesn't ;) It's not like adjustable cam sprockets where you can finetune the timing chasing tenths of a horsepower. To be honest, I'd recommend it over exhausts and induction, the performance gain is broadly comparable and it's so much cheaper.
138 for a standard K5?
I got 126 out of mine and it had about a few mph left.
Bike said 135mph and ride said 125mph...take ur pick. for a pointy K5 S.
Bear in mind i'm a 5 ft 3 girl that weighs virtually nothing so i tuck in behind the screen and the bike has to put no real effort in to carry me. And i did say indicated so you can take a few MPH off to get real world speed.
I don't wanna get flamed but i regularily get 120 (indicated) out of my K5 with very little effort so 138 is more than possible and if i remember from previous threads i'm not the only one that has seen this on the clock.
I've had a indicated 143 but I'm about 10 stone soaking wet so this probably helps with top end speed. I don't think this was actual speed for one minute, but if you can tuck in behind the screen and have a test track long enough it does get there ..... slowly.
lodman27
07-05-06, 08:50 PM
I'll second a 143 :D , although its now gone down to a rev limiter bouncing 137!!! (14tooth front sprocket)
Lawrence
tomjones2
08-05-06, 06:52 PM
when i tested the speedo against my tomtom/mio 168 it was reading over, approx 90ish(gps) 96(sv), the writing is very small on the unit and i didn't want to spend ages looking at it. Not sure how accurate this unit is though
I'm not small but with leathers on it will do just 130, takes an age for the last 5mph to pass though.
DanAbnormal
08-05-06, 07:58 PM
I've had a an indicated 172mph..................but that was on my zx-7.
I'll just go shall I! :D
Had about 135 or so indicated but it has a little more room.
MilleonAir
08-05-06, 09:35 PM
I picked up my well used 2000 model curvy two weeks ago and nailed it down the A3 late one evening to see what it'd do - 130mph in stock trim. Then I took it into the shed to start cleaning it up and found all the secondary seals hanging out of the calipers! :shock:
Ian
142 just now on the way home :D
tinpants
09-05-06, 12:35 AM
132 on the sv. Pretty much stock apart from a mivv can.
160 on the 'storm. shee-it thats fast. :twisted: :roll: :shock: :shock:
all speeds as indicated on speedo. attained on "private road" ahem :twisted:
remember... speedos are wrong... always... so take of 10% for error correction..
140-10%=126.
Unless you did it on a straight line with a GPS, then your figures will be closer to correct.
northwind
09-05-06, 01:32 PM
Yup, or you have an accurate speedo fitted/speedo healer. Or a bigger front tyre, that makes a difference too.
Most of us racers disconnect the speedo drive unit. Best i had from a curvy was an indicated 140mph along the A3..naughty yes!!.
Having changed my race injected SV from a 650 to a 700cc bore i can tell the difference in top end. Id reckon on 145 poss more at snett running a 15/44 sprocket setup. The bike feels like it would pull 15/43 easily too.
ah yes the A3 that be a fine road for road racing
busasean
12-05-06, 09:31 AM
I've had a an indicated 172mph..................but that was on my zx-7.
I'll just go shall I! :D
Had about 135 or so indicated but it has a little more room.
had my deristricted busa off the clock which is about 180ish mph
also had my sv up to an indicated 138mph, and had my transalp up to 110mph :D
the transalp was the most frightening flat out :shock:
SpankyHam
12-05-06, 09:32 AM
My bike only indicates 120 Top Speed. That is on a straight, being tucked under the screen.
Is there something wrong with my bike then ?
Hi PatrickUK
Tell us more about your bike - milleage - any mods etc. I have always managed 130 (indicated) not been faster on my original 1999 yellow curvey or my replacemnt 2002 model. Not been faster on an SV ever, but 120 MPH does not sound right to me. In fact scratch that request - you have listed most if not all on your signature doh! - any carb work or internal work as recommended by North Wind? Seems a little short on the top end.
DanAbnormal
13-05-06, 10:17 AM
My bike only indicates 120 Top Speed. That is on a straight, being tucked under the screen.
Is there something wrong with my bike then ?
Most importantly how much do you weigh?
I weigh 13 stone 7lbs and can get 140 indicated.
The Basket
13-05-06, 10:21 AM
120mph on the old speedo should be a gimme.
I've had 142 indicated with rev limiter kicking in, it felt like there was more to come as well ( 11 stone ). with regards the earlier comment about ZZR600 toasting an SV, would have too disagree, sure top speed the SV has no chance, I regularly go out riding with one and on the twisties i can easily pull away from corners, in a straight line I reckon the SV will be in front up too about 110 - 120 before the ZZR would get past.
The Basket
13-05-06, 10:45 AM
Yeah about the ZZR.
The ZZR has roughly the same torque as the SV but weighs more...so the SV should pull away at low to medium revs. Pretty heavy with old suspension so a SV should out burn and out turn it.
But when the revs build and it's a straight road....oh mama....The ZZR pilot will see the SV in those good mirrors it has. :D [/u]
SpankyHam
13-05-06, 11:16 AM
My bike only indicates 120 Top Speed. That is on a straight, being tucked under the screen.
Is there something wrong with my bike then ?
Most importantly how much do you weigh?
I weigh 13 stone 7lbs and can get 140 indicated.
15 1/2 Stone :oops: :lol:
actual weight is irrelevant to top speed, on a long enough (and level) road. Top speed is a function of thrust and drag. Drag increases as you go faster. When drag = thrust, you can't accelerate anymore.
Weight only affects acceleration. Although i do accept that a heavy rider probably creates more drag because of a larger body volume than an 8 stone pipsqueak.
northwind
13-05-06, 02:01 PM
Acceleration's what gets you to top speed though.
Acceleration's what gets you to top speed though.
if you stick a large block of lead under the rear seat, you'll get to the same top speed, it'll just take you longer to get there
northwind
13-05-06, 11:22 PM
Well, not neccesarily. Increasing weight could also increase rolling resistance. A tiny tiny bit :)
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