Re: Carb Upgrade
 

Check this out, this is my story:
http://www.johnnyrod.co.uk/dynoruns.jpg
Stock means stock, PDQ means after fitting the ignition advancer (£50 fitted), Akro pipe (???), K&N (can't remember) and having it set up properly at PDQ (inc. Dynojet kit). Finally I added the K3 cams (£140ish) which give a good dollop of top end. That's it, no gas flowing or any other f'ing about. Bear in mind this is DJ horespower but you can see and feel the difference. I think the carbs are fine, and the throttle response once PDQ got involved is as snappy as I've ever ridden. Pity I don't have the right dyno charts to show it though.

Re: Carb Upgrade
 

+ 1, very true!!!

Re: Carb Upgrade
 

yeah very true. I did the tunnig because my mate on his GSXR600 (old one) was getting away from me on the straights at Cadwell

Re: Carb Upgrade
 

Well I can't do any other mods, than I listed in the last post, bhp can be no more than 72bhp, anyway so I'm not looking to up that alot.

Re: Carb Upgrade
 

I'm glad to hear the SV's carbs are so good, is there anything that does go wrong or wear out on them? I'm probably being paranoid but my SV seems a bit sluggish these days, especially below 4k. It's a 2000 X-reg by the way.

Re: Carb Upgrade
 

whats all this talk of k3 cams? are they 2003 cams or a brand called K3?
is it a different profile? is there a thread outlining it all?
let me know.
cheers
dan

Re: Carb Upgrade
 

Minitwins? You do have the option of fitting the more recent cams, which is quite expensive and not as beneficial as the dual intake swap, but I'd still consider it. Actually, what I'd do is look for a scrap engine and rob the cams out of that... Though you need to be patient. Strangely buying a set of SV heads will cost you £100, but buying a whole blown up motor will often cost less and it gives you lots of other nice spares- clutch, side casings, gearbox, etc. SV engines tend to get written off for non-catastrophic bottom end failures, which leaves most of the rest intact (or, heh, you have the unusual option of swapping the cams with your road bike!

(oh, and if you find the more recent variation you can nick the gear selector stuff, I think that's K5 onwards... Not a huge difference there but if you ever suffer from dodgy shifts it's good)

Re: Carb Upgrade
 

2003 or later cams... Suzuki based them on the Yoshi cams for the carbed bike apparently. They're still pretty mild- no need for stronger valve springs frinstance- but they unlock a bit of extra power.

For the road bikes, the standard practice is to fit K3> intake cams, and then to use the old intake cams as exhaust cams. The timing marks are all wrong but apart from that it's straightforward and very effective on a lightly tuned bike. The SV exhaust cams are fairly restrictive, I think for noise reduction (you can hear the difference with the hotter cams). On the FI bikes there's not such big gains to be made but a lot of people still fit carbed model intake cams into the exhaust side.

Not as good as real custom-made adjustable high-lift cams but then, they cost 4 times as much or more. This is a cheap-ish and effective option.