I still don't get it, why so many poeple want a conversion kit,when most of the riding they do is on the street. Save the money or spent it for something that's at least usefull.You don't will feel any difference by side your chain needs to be ajusted more often and be changed for a new one since the 1000's are to strong for a 520. You are not a racer who get's sponserd doesn't pay for it and need every little advantage and they almost change they stuff after every race.I just put new sprockets ( esjot +2 rear ) and ek X-ring ( 530) on my gsxr 1000 track bike and I do alot of track days but didn't fell a bit the need for a conversion. You may never come that close to the bikes potential that you will need it,especially for a street bike. But hey, who am I.
Totally unnescessary waste of money if your not racing. But If your going to do it anyway I will say it again.
RK 520 makes the only chain with a high enough tensil strength for the 1K. It Is What Mladin uses. It is what I have on my race bike. DID will work as well but you will stretch it and replace it, faster than the RK.
Sprockets- Steel front
Rear-- Sprocket Specialist are really light and hard. Add three teeth to the rear. Vortex are absolute garbage and very heavy. AFAM so so.
And once your done, hang the hell on. It makes a huge difference.
If you do not know what you are doing you are creating a bike with a SUPER HIGHSIDE RISK.
I speak from experience from my HIGHSIDE in a really fast kneedragging lefthander. Gave it too much throttle and the next thing I know I am getting loaded into an Ambulance 15 minutes later.
Also, Make sure you either raise your seat height, or go to a 190/60 rear. This will help you keep the front down a little better.
I currently have -1 in the front sprocket and I have very good experiences with that. Next thing I'm getting is the 55 series rear tire instead of the original 50 and I'm going to compensate it a bit by adding one or two to the rear sprocket. Changing the ratio does actually make sense performance wise because the K5 gets it's top speed on the 5th gear.
So actually you won't lose much top speed.
CrashCrain, you are right about the HIGHSIDE risk. The bike feels much stronger after you chance ratios....