I am sorry did I miss something here. Where did I disrespect someone?

 

I dont think you did, but what you said was completely wrong. Rotating mass and the weight of the fuel tank are totally different things. It does increase power to the rear wheel because the motor is using less power turning the chain and sprocket, so more power will be transferred to the rear wheel. Its like underdrive pullys for automobiles, they do not increase the power output of the motor but they do increase the amount of power that hits the ground. Less rotating mass "frees up" horsepower. Yes the 520 may not last as long as the stock 525, but really its not that big of a deal. The kawasaki zx6r is running a 520 stock, and that makes considerably more power than an f4i, so obviously 520 lasts a long enough time. And to comment on the posi traction thing, thats wrong too. If you have 500hp in a car, the rear wheel power will be the same with lsd as without. A lsd will just distribute the power to both wheels evenly where as a car with an open differential will try its best to distribute equal power to both wheels, but when traction is lost it will apply all the power to only one wheel, the wheel thats slipping. A 500 wheel horsepower car with lsd should, in theory, distribute 250hp to each rear wheel. A 500 wheel horsepower car with an open differential with one tire spinning, will put 500hp to the spinning wheel and none to the other. Its also funny how you guys with domestic cars still call it "posi-traction." That is just the term pioneered by American car companies in the 60s, mainly GM, to differentiate their LSDs, Limited Slip Differentials (the proper generic term), from other auto company's limited slip units. In my mind the term posi track is assosiated with guys in mullets smoking pall malls listening to zepplin with the t-tops off like in Joe Dirt. Engineers definately dont call it "posi-trac" unless they work for GM. Sorry, just had to rant a little bit about "posi-trac."

 

haha, i always wondered if LSD and posi was the same damn thing.. clears it up now. thanks man

 

muahahahha...no you didn't disprespect yo...you just got your words confused regarding rotational mass...i was saying like gets it right cause we cali boys mang!

that's right baby...my auburn will leave 2 equal length burnies on mah tahoe...well used to...until i broke the engine mount...now it takes off as fast as a snail...

 

Man I have been hearing that a lot lately..........As far as the tank thing I was being sarcastic..

 

I just got a 520 kit with -1 front sprocket on my bike ('01 f4i) today. It makes a noticeable difference in power. On the interstate it makes 6th gear feel like 5th gear with stock gearing. The motor really doesnt rev that much higher while cruising so its really not a bad mod to do. The bike now needs less clutch slip to get going. Its definately the best bag-for-the-buck bolt-on mod you can do. Its still not the fastest bike in the world but it sure is better than stock.

 

what's a 'bag-for-the-buck'? is it like bang for the buck? hahaha j/k...

yea dude, it revs like 250 higher only...but feels like a lot more on highway...so you'll be searching for that invisible 7th gear for a long time to come! welcome mang! it's been like 2 years on my -1 and i'm still searching for 7th...i have a 520 +3 waiting for me...it's a tiny bit more than a -1 but i just can't get the DID chain or the RK sprockets to wear out! they gots like 16K on them and they still hardcore!

and biatches...puhlease...i ride the **** out of this mawfaki...the DID is the bomb mang!

 

this is a very interesting conversation.... does ne one happent o know the stock teef on the sprockests i bought mine with -1 on front but going to swap to 520 with stock front and +2 in back

 

Stock is 16 front/46 rear.

 

I went up three in the rear and I have a 500 rpm difference. Maybe becaue I have a liter bike?