performance mods? 74bhp

[ice]

hi guys
i'm looking for sum advice really, i'v got a sv650s sk6 model and wanna improve the peformance from it, i've done sum mods already and it dyno's at 74bhp what i have done is the following, k&n airfilter, airbox mod, cams re-profiled at kent cams and iridium plugs, power commander with custom map, v-stacks and a TRE mod, got a scorpion end can, would like to get my bike up to around 80bhp, mark, i know that i could spend loads on it with very little peformance gain, and i've done the suspention on my bike already got nitron track shock and progressive springs, so looking to make my s.v go as well as it handles, but dont wanna spend stupid money on it, any advice would be fantastic, oh and please don't tell me to just get a sv1000 wanna see what u can do with a 650 , jhc racing recommends a full exaust system, but i love my scorpion end can:confused: and it sounds amazing
jarrod

[Spikenipple]

You'd probably see a little bit of an increase with a full Akrapovic or M4 race exhaust system.

[barwel1992]

full leo vince tapered system, bored out TB's, use lighter busa pistons with bore hone. not a power gain but lose as much weight as possible

PS wouldn't call the progressive springs sorting the suspension get some cartages or a gsxr or some other front end on there

[Jordy]

Whack a turbo on it, simples...

[fizzwheel]

oh and please don't tell me to just get a sv1000 wanna see what u can do with a 650

OK then.

Buy another bike, not necessarily an SV1000

As you stated you dont wanna spend stupid money on what you have, then buying bike with more power to start with is IMHO much less trouble and much more cost effective.

[yorkie_chris]

You don't want to spend much money then forget it ;-)

As barwell says.
Order I would do them is TBs first, send a set to Zoran in states (twfracing.com/zparts.html), then exhaust, leo or M4 is OK. Leo is better, and they have a sale on. Then pistons and reduce squish a bit. You can also do half of cam swap.

[danf1234]

Or just don't bother and enjoy the bike. Spend money on suspension.

[yorkie_chris]

Yeah I also think GSXR front end is way to go.

[TazDaz]

OK then.

Buy another bike, not necessarily an SV1000

As you stated you dont wanna spend stupid money on what you have, then buying bike with more power to start with is IMHO much less trouble and much more cost effective.


...and with the more powerful bike you generally get better brakes, supension etc.

[kiwi_uk]

I would go full system first. make use of the mods you've already made and then if you still want more start looking at your TB's

[beabert]

Why bother spending all that money for little return, start with the sv1000 and mod that if you feel the need.

[toxic]

Full exhaust system is a must.

[SV650Racer]

Full Leo Vince system. remap the ECU. Mod the airbox and fit a filter. Junk the TRE. Kent cams, gas flowed and skimmed heads with stronger head bolts. Using stock pistons etc you will see 82-83bhp on our dyno which reads a stock SV650 at 68bhp with an end can.

TB's have done lots of these and results are around 1-3bhp increase but generally shows an improvment right the way through.

[stefansv650s]

Ive got a curvy 2002
I had it dynod and set up before the winter with 89bhp (at the flywheel), was well impressed!
I have got Pipewerx exhaust, dyno jet kit, K& N replacement filter and use super unleaded

[Biker Biggles]

Ive got a curvy 2002
I had it dynod and set up before the winter with 89bhp (at the flywheel), was well impressed!
I have got Pipewerx exhaust, dyno jet kit, K& N replacement filter and use super unleaded

R6 throttle ??????

[stefansv650s]

Its got a smaller front sprocket other than that nothing else.
The chappy at AMR racing was impressed for otherwise would seem a normal bike.
I'm not the original owner so not sure if anything else has been changed.
I will have to scan in the dyno thingy to show ya.

[SV650Racer]

Its got a smaller front sprocket other than that nothing else.
The chappy at AMR racing was impressed for otherwise would seem a normal bike.
I'm not the original owner so not sure if anything else has been changed.
I will have to scan in the dyno thingy to show ya.

At the flywheel?. Only an engine dyno can measure crank BHP. Did they give you a bhp figure from the rear wheel?

[stefansv650s]

Yeah it was about 79bhp at the wheel.
As for someone else post SV1000 is most definetly the next step and mod from there.

[davepreston]

Yeah it was about 79bhp at the wheel.
As for someone else post SV1000 is most definetly the next step and mod from there.
fyi my sv1000 was 116 at the rear wheel standard apart from k&n and slipon zaust

[danf1234]

Full Leo Vince system. remap the ECU. Mod the airbox and fit a filter. Junk the TRE. Kent cams, gas flowed and skimmed heads with stronger head bolts. Using stock pistons etc you will see 82-83bhp on our dyno which reads a stock SV650 at 68bhp with an end can.

TB's have done lots of these and results are around 1-3bhp increase but generally shows an improvment right the way through.

And just what is cost of that lot? I am guessing quite a lot!:confused:

[barwel1992]

learning to polish and port at the moment so might get some spare heads and give it ago (wont be any time soon though)

[suzukigt380paul]

if the sv650 aint fast enough and does't handle you should have got something better in the first place,a sv1000 is faster and got more horsepower but everybody i know who has had one has had major trouble with the clutch drum and have been glad to get shot of them,so i would recomend a blade or a r1,or if thats to much hp then buy a vfr800 and get the best of both worlds being a 4 cylinder and a v

[-Ralph-]

Instead of telling the guy what he's already said he doesn't want to hear, why can't we just answer the bl00dy question? Or keep quiet. Maybe there's other reasons why he likes his SV and wants to keep it! Look at people who will spend 10-20 grand restoring an old Norton or somesuch, they don't do it 'cos they'll end up with something better than the new bike they could have bought with the same money. One thing about the forum that drives me nuts is the need to caveat your OP with all the responses you don't want, 'cos you can just see what's coming.

[danf1234]

Instead of telling the guy what he's already said he doesn't want to hear, why can't we just answer the bl00dy question? Or keep quiet. Maybe there's other reasons why he likes his SV and wants to keep it! One thing about the forum that drives me nuts is the need to caveat your OP with all the responses you don't want, 'cos you can just see what's coming.


Agreed. Most people think I am mad for spending what I have on the SV, but the simple fact is I like the bike.

Would like Sarah to step up from SJ's and tell us the price list for those mod's she has quoted!

[yorkie_chris]

Full Leo Vince system. remap the ECU. Mod the airbox and fit a filter. Junk the TRE. Kent cams, gas flowed and skimmed heads with stronger head bolts. Using stock pistons etc you will see 82-83bhp on our dyno which reads a stock SV650 at 68bhp with an end can.

TB's have done lots of these and results are around 1-3bhp increase but generally shows an improvment right the way through.

Why the head bolts? Will they lift with the small bump to the compression that you can get away with?

[beabert]

Instead of telling the guy what he's already said he doesn't want to hear, why can't we just answer the bl00dy question? Or keep quiet. Maybe there's other reasons why he likes his SV and wants to keep it! Look at people who will spend 10-20 grand restoring an old Norton or somesuch, they don't do it 'cos they'll end up with something better than the new bike they could have bought with the same money. One thing about the forum that drives me nuts is the need to caveat your OP with all the responses you don't want, 'cos you can just see what's coming.


Because it would make the forum a boring place if all topics were on topic, i think people are just trying to understand why.

My advice if you dont want an sv1000, put an sv1000 engine in it, makes even less sense ay lol.

[-Ralph-]

Because it would make the forum a boring place if all topics were on topic, i think people are just trying to understand why.

My advice if you dont want an sv1000, put an sv1000 engine in it, makes even less sense ay lol.

It's not about being on topic, it's about trying to help the guy, instead of preaching a message he's already said he doesn't want to hear. He can then make his own decision on whether is mod is worth the money.

Maybe you were trying to understand why

Why bother spending all that money for little return, start with the sv1000 and mod that if you feel the need.

but you were the only one who posed your reply as a question. Everyone else just told him to stop wasting his time and money and get a different bike.

[barwel1992]

for me the increase in performance is just the out come of a hobby that i love doing.....messing with bikes and mechanics im not the best by a long way i have only been spannering for about a year and a half if i can do most of the mods my self to bring the cost down then i will

thats what makes most of the mods i have done affordable like the cam swap cost me about £25 for about 2bhp

also it helps to have a GF as she buys me stuf :D like velocity stacks


Everyone else just told him to stop wasting his time and money and get a different bike.

i didn't but thats because i would do it my self if i had some more money.

[SV650Racer]

For those that suggest the SV isnt worth it and doesnt handle, all I can say is you obviously havent ridden a well set up and well prepared one!. Stop being tight for a few moments of today and go and buy Decembers PB mag while its still in the shop and have a read up on the bike that Steve rode this season. It would be capable of running on the road if you had the budget. Yes it cost alot to develop both in time and money but shows exactly how capable the SV can be. Even if you take small elements from the total build.

Why not make the SV the best bike for you?. Personally the SV1000 has a worse chassis compared to that of the SV when well setup!.

Anyways cost wise your looking into around £2800-£3000 for the system, tuning work, cams, airbox mods and dyno time inc removing motor from the bike, stripping replacing gaskets, cotters, lightening and balancing crank. Costs vary though from bike to bike as you wont always know whats needed until the motor comes apart.

Its not about cost though, we have had customers spend £10k plus and you know what, they love their bike and thats what its about.

[danf1234]

For those that suggest the SV isnt worth it and doesnt handle, all I can say is you obviously havent ridden a well set up and well prepared one!. Stop being tight for a few moments of today and go and buy Decembers PB mag while its still in the shop and have a read up on the bike that Steve rode this season. It would be capable of running on the road if you had the budget. Yes it cost alot to develop both in time and money but shows exactly how capable the SV can be. Even if you take small elements from the total build.

Why not make the SV the best bike for you?. Personally the SV1000 has a worse chassis compared to that of the SV when well setup!.

Anyways cost wise your looking into around £2800-£3000 for the system, tuning work, cams, airbox mods and dyno time inc removing motor from the bike, stripping replacing gaskets, cotters, lightening and balancing crank. Costs vary though from bike to bike as you wont always know whats needed until the motor comes apart.

Its not about cost though, we have had customers spend £10k plus and you know what, they love their bike and thats what its about.

And what would that give you in terms of BHP and top speed?

I am genuinly interested and not be sacastic!

[fizzwheel]

He can then make his own decision on whether is mod is worth the money.

But he also already said in his first post, that he didnt want to spend huge sums on money on it.

Look at the post from Sarah further dowm, talking about £2800 to £3000 that is in my book alot of money.


At the end of the day its not my bike. I was merely albeit poorly trying to point out that I thought he had underestimated just how much cash this was going to cost...

Anyway I'll shut up now.

[SV650Racer]

And what would that give you in terms of BHP and top speed?

I am genuinly interested and not be sacastic!

Hey thats fine, I know your not;)

Top speed, hard to be accurate as only ran that on racebikes which dont have a working speedo. The only data i have is from Steve's bike but that was a full blown 700cc motor with Nova gearbox. He slipstreamed Phil Read Jnrs bike at Thruxton and that bike had GPS measurement of 161mph, Steve snook past him!. Gearbox ratios played the major part though as the stock SV box is restrictive for top speed. Steve was running I think from memory gearing of 18/39!!..it pulled off the line though like a wet trump:p

BHP wise the 650cc spec tune ive mentioned with a Leo Vince pipe made 82bhp. The bike was built from a stock road bike which measured 68.7bhp when it came in. We were using an Interceptor fueling controller which gives a little more scope to tune the AFR better than direct mapping but that just built a better curve rather than overall BHP figure.

Its not just overall full throttle BHP that gets a bike going quick. Ok it looks good down the pub and as a comparison but the way the bike makes the power is just as important.

[fastdruid]

Well as a comparison the original owner of the 700cc engine I have spent £1800[1] with jhsracing some years ago to get it bored out and it currently gives ~79BHP@rw. That gets me easily hitting the limiter at about 126mph in top down park (as that's what its geared for), it actually could now do with gearing up slightly as it was geared as a 650.

Druid

[1] I bought the engine s/h of a mini-twin racer who was swapping it for a 650 engine and it came complete with the receipt for the work. I paid rather a lot less than £1800 :-)

[yorkie_chris]

You can get most of the gains yourself with info that's on the net, or save a lot of money by doing the donkey work, like pulling the motor out and bolting throttles and exhausts on yourself.


Why not make the SV the best bike for you?. Personally the SV1000 has a worse chassis compared to that of the SV when well setup!.

And even when well set up it will still be a ****sight heavier.

Though to give the TL motor it's due, they can be tuned up to a mental amount of horsepower. But if you were going to do that, why didn't you buy a GSXR1000? You can tune those to a mental degree too, but why didn't you just buy a 'busa?

[BoomBoomBox]

Exhaust systems are the way to go. I agree with the lads above, I had a Leo and could tell a difference...