More power

im 19 so theres nufink else i relly can get insured on its a 2005 i didnt think i could jet it

[fizzwheel]

Where exactly do you feel the SV is lacking, what you are you trying to improve ?

IMHO your going to spend alot of money and not get a huge amount of extra BHP. You'd be far better off spending a bit of money and upgrading the front springs and fitting a different rear shock and then being able to make more use of the power you've got.

Originally Posted by fizzwheel

buy a bigger bike

( well somebody had to say it didnt they )

Or loose some weight

[northwind]

Tuning an injected SV's harder than the carbed one, and even the carb one's not really good value to tune... You can get a good few bhp, but not cheaply.

If you want to go faster, look at the suspension instead. I guarantee you my front end and Ohlins makes me faster over any given distance than my extra 10bhp. I don't miss the power badly if I ride a standard SV, but my god do I miss the forks and the brakes!

[Sid Squid]

Originally Posted by aze_b

More power

Probably not.

[Viney]

Originally Posted by aze_b

im 19 so theres nufink else i relly can get insured on its a 2005 i didnt think i could jet it

Erm, there you go...learn to ride properly before you go any faster. The SV can be more than fast enough. It may sound condesending but we all earn, we all could ride that little smoother/better. And remember, Smooth+fast.

Originally Posted by alpinestarhero

Its not to hard to get a few extra BHP out of an SV, or any bike for that matter. When i think about engine tuning, i think along the lines of "more air in, more exhaust gases out, more power". A good full exhaust system can gain you power well, as can the right carburation. You can get more expensive and lob in light engine internals, which can gain revs aswell as BHP. There are also big-bore kits (I think as far as 800cc? im probably wrong on this!)

750 is the biggest you can go pretty much with off the shelf stuff. for a 700cc kit you'd be looking at about 1500 quid for the work to be done which would include a bit of balancing and a head skim to up the compression a bit. To get to 750cc you need a stroked billet crank tha will set you back somewhere in the region of £1400 so unless you have money to burn i wouldnt bother. even with the 700cc kit your only looking at a true real world BHP figure of 80hp which would be about 8 more than you'd get from a standard pointy with full M4 filter and remap on it.

If you have a curvey then your first port of call once you have the filter, full systewm and jet kit would be to fit a set of K3 cams to the bike and that will get you up to around 72hp.

[northwind]

Well, couple of things there One, is that K3 exhaust cams aren't neccesarily the way to go on a street bike- using the K2 intakes in the exhaust side can give better results, and it's cheaper, just not minitwins legal...

With 700cc, you could do it for a fraction of that cost if you leave the bottom end alone... Particularily if you can do the strip and rebuild yourself, which isn't brain surgery- call it 4 spanners You'll not get best results- a DIY build likely will mean cutting corners on decking the heads, where a pro would get that as tight as possible an amateur'd probably want to make do with wider clearances for ease of work. Less good, obviously, but then potentially much cheaper. When you get to things like this, you have to ask "is it worth paying £1500 for the bells and whistles job when I could do it adequately for under £400".

Real benefit of the 700cc kit IMO isn't just peak, it's midrange. Not going to get back into "is it a good idea" though Personally, I reckon spending any significant amount of money on tuning a road SV is impossible to justify purely in terms of performance results- it's just too expensive for a bike worth probably £3000 tops. But, that's not the only reason to tune a bike, and the others can't be analysed in terms of "£££ per" whatever.

Originally Posted by northwind

Well, couple of things there One, is that K3 exhaust cams aren't neccesarily the way to go on a street bike- using the K2 intakes in the exhaust side can give better results, and it's cheaper, just not minitwins legal...

Agreed although i still have my ''minitwin'' head on so had fogotten about this

With 700cc, you could do it for a fraction of that cost if you leave the bottom end alone... Particularily if you can do the strip and rebuild yourself, which isn't brain surgery- call it 4 spanners You'll not get best results- a DIY build likely will mean cutting corners on decking the heads, where a pro would get that as tight as possible an amateur'd probably want to make do with wider clearances for ease of work. Less good, obviously, but then potentially much cheaper. When you get to things like this, you have to ask "is it worth paying £1500 for the bells and whistles job when I could do it adequately for under £400".

Once again agreed but you have to think that perhaps if your having the bike apart to fit a 700cc kit you may aswell go thew whole hog a get a bit more done while the bike is apart. And yes it can be done cheaper but then like you say it depends what your mechanical knowledge is. The guy asking is a 19yo who at a rough guess(and correct me if i'm wrong) wont have a mass of knowledge to dream of undertaking this type of work himself. I was recently planning on doing just what i suggested and it was looking at costing me about a grand as i was going to do most of the stripping myself and then just leave the reassmebly to those that know how seen as the engine was going to go in a highyl stressed race bike

Real benefit of the 700cc kit IMO isn't just peak, it's midrange. Not going to get back into "is it a good idea" though

agreed. expect a torque figure around 55ft/lb up from high 40's

Personally, I reckon spending any significant amount of money on tuning a road SV is impossible to justify purely in terms of performance results- it's just too expensive for a bike worth probably £3000 tops. But, that's not the only reason to tune a bike, and the others can't be analysed in terms of "£££ per" whatever.

Agreed also. Your far off spending your money on rider training and suspesnion than engine work as the benefit will far out weigh any gains made from the engine tuning

[northwind]

Originally Posted by chunkytfg

Once again agreed but you have to think that perhaps if your having the bike apart to fit a 700cc kit you may aswell go thew whole hog a get a bit more done while the bike is apart. And yes it can be done cheaper but then like you say it depends what your mechanical knowledge is. The guy asking is a 19yo who at a rough guess(and correct me if i'm wrong) wont have a mass of knowledge to dream of undertaking this type of work himself. I was recently planning on doing just what i suggested and it was looking at costing me about a grand as i was going to do most of the stripping myself and then just leave the reassmebly to those that know how seen as the engine was going to go in a highyl stressed race bike

Yep, agree with all that... Well, nearly If you've got the cases split for other work then balancing the crank etc makes total sense... But on the SV boring it out's not all that invasive, so it's still a lot of extra work to go further.

Put it another way, it's hard enough to justify the parts and labour expense on doign the 700cc boreout on a road SV even if you can do it cheaply

Then, what makes sense for a race bike and road bike isn't always the same of course. If that extra bit of work makes the difference between third and a win I suppose every penny was worth it.