I have been reading up on the 520 conversion but am concerned with the speedo then being off.Do you have to use a 15t and 45t or can you leave the stock 16t with a 46t rear to compensate and leave the speedo alone?
I was also thinking of sticking with the 530 and just going to a 46t rear.Any thoughts ideas or suggestion would be great before I spend the money and since I have new tires on order the rear has to come off anyway.If taking the rear tire and sprockets off does the chain still need to be cut and rolled on or will a sealed chain slip on with out taking the swingarm off? TIA

 

if you replace your chain with a 520 chain, you will need to replace both sprockets with 520 sprockets. doing the 520 conversion wont affect the speedo as long as you leave the stock gearing. if your looking for more power down low i would just get a -1 front sprocket and use the stock chain and rear sprocket (unless the stock chain is stretched to hell).

if you want the stock chain off you will have to cut it. even if you remove the swingarm the chain will still be wrapped around part of the 929 swingarm.

 

Thanks for the info,will changing the rear sprocket only affect the speedo? I prefer to go 3 up in the rear versus 1 down in the front and if it won't affect the speedo then I may go with a 46/16 in a 520 to keep the speedo as is and still benefit from the 520,now that is in theory,will it work ?

 

if you change the stock gearing your speedo will be off, and the bike will feel buzzier because you will be riding around at a higher rpm
if you switch to a 520 chain you will need to replace your stock 530 front sprocket with a 520 front sprocket and change your stock 530 rear sprocket with a 520 rear sprocket. You wont be able to mix and match 530 sprockets and 520 chains. or vise versa


hope that helps, good luck

 

Yes it does and thanks I was not going to mix or match it would either be all 520 or 530 but you answered me with if I change either from stock the speedo will be off,Is there a way to correct it once you have the gearing you want or just gps it and remember how off it is.Plano cops are not to understanding

 

yea you can buy a speedo healer or yellow box. heres a review on speedoheelers by Sirkbac. http://cbr929rr.com/speedo.htm



yea, i try to stay out of Plano when i ride

 

Lakota...another reason to get the speedo healer...if your MPH are higher than actually traveling...then your miles went will be off also...you will depreciate your bike on miles you didn't really travel (not just ticket potential)

 

Lakota,

I just posted this to another thread but I'll put it here in modified form since some info is pertinent to your question I think:

Your OEM chain is a DID 530 chain. "5" is the linear pitch (length between roller pins) and "30" is the lateral pitch (width) which is 30/80ths or 3/8". So a 520 conversion is the same linear pitch but a 20/80 or 1/4" width and weighs 2 lbs less (on average) than a 530 chain. Weaker, so if you go 520 conversion you move up to the DID 520ERV race chain since it has higher tensile strength to resist premature chain stretch or potential breakage.

Generally I do not suggest 520 conversions to street riders unless you don't mind more frequent chain/sprocket replacement to handle the tradeoff of the performance gains. Beyond gearing changes resulting in torque to the rear wheel, a lighter chain (which also means a lighter rear sprocket by 15-20 oz) means less power lost through the drivetrain and the engine spinning up faster.

I leave my 929RR track bike (retired AMA/AFM race bike) running 520ERV3 chain with 15/45 gearing which is best for me since it works at most tracks we run and this built 929 has decent enough power than I can just roll on to keep up with most students at our schools. We replace my chain sprockets about every 2000 track miles. At these low miles, the sprockets are usually not too bad but the chain is stretched enough that it needs replacement. But plenty of my customers are getting 7-8K miles from their 520 conversions with DID 520ERV chain and AFAM hard anodized sprockets.

On gearing... Each tooth you drop up front is about 6% more torque to the rear wheel, where each tooth out back is about 2.5% (approx.). So 15/45 is about 11% more torque at the rear wheel, 15/46 would be about 13.5%, and so on.

So if you do a typical -1/+2 conversion 15/45 your speedo will probably be reading about 15-17% high but your odometer will only be about 11% off (reading higher miles) since while the factory speedo is off, the odometer comes pretty accurate.

As mentioned, the Speedo Healer (we're the US importer, btw) will fix your factory error and compensate for gearing changes that make it further inaccurate. $89.99 for members with free shipping.

 

Thanks for the info Todd,and I don't mind the added adjustments since I will be running track days as well and my shop is set up pretty well for the extra work.

 

I'm running an RK 520 chain on my 1000RR and it's holding up nicely. 1 initial adjustment at 500mi and no stretch since then.