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CBR Forums >> Current Honda CBR Models >> CBR 600F4i >> sprockets help

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sprockets help - 6/30/2008 6:56:32 AM

cbr600f4iftw

Posts: 9
Joined: 6/30/2008
Status: offline

I got my F4i used a couple months ago and it already had some mods like slip on, PCIII, ect. Now i have just discovered that the rear sprocket is 48 teeth making that +2. now the front sprocket is still 16 so there is no change there. My question is.. does this effect the speedo/mileage? how has it changed the performance of the bike? Thanks for any help.

Post #: 1

RE: sprockets help - 6/30/2008 7:34:12 AM

Exitwounds

Posts: 125
Joined: 9/10/2007
Status: offline

You will have to wait for the more knowledgeable guys to pop their head in here, but from what I have heard you will have difference in both categories. I think its like a 3:1 ratio rear sprocket:front sprocket. So basically you have almost done the equivalent of dropping a tooth in front.

_____________________________

".....next time I hit triple digits on the speedo, I'll think twice about it and try to remember that the feeling I get while going fast doesn't compare to the hurt I'll give so many people (god forbid) should something terrible happen."

-JfunkRR

(in reply to cbr600f4iftw)

Post #: 2

RE: sprockets help - 6/30/2008 7:48:08 AM

Todd84

Posts: 130
Joined: 2/14/2008
Status: offline

It makes the bike quicker and brings down the top speed. Your speedometer will be showing faster than you are actually going. Also the bike has less miles on it than the odometer shows. I just got a speedohealer hooked up on mine. It corrects the problem so you don''t have to geuss on speed. It is a very soild purchase. The top end difference you will never notice. the bike will still probably do 150mph. My bike is -1 in the front and +2 in the back and I really love it. If you go to the speedohealer website it will tell you how far off it is.

_____________________________

''''03 rashed up F4i
PC III USB
-1/+2
Two brothers slip on
SpeedoHealer
Multi function Hub
LCD display from Dynojet
Custom one off triple tree, Rearsets, and Grips

''''74 cb550 Cafe Racer

(in reply to Exitwounds)

Post #: 3

RE: sprockets help - 6/30/2008 8:21:06 AM

cbr600f4iftw

Posts: 9
Joined: 6/30/2008
Status: offline

Hey thanks for the quick responses. It looks like im about -4.2% off. so does that mean i am about 4 MPH slow all the time?

(in reply to Todd84)

Post #: 4

RE: sprockets help - 6/30/2008 12:07:32 PM

Todd84

Posts: 130
Joined: 2/14/2008
Status: offline

NO it means you are always 4.2% off. At 100mph you would be 4.2mph off at 50mph you would only be 2.1mph off. Not that much maybe you don''t need to get the speedohealer with my sproket change it was about 17% off so I had to get one instead off do the math. I wouldn''t worry about it. Also for every 100 miles it adds 4.2 miles, again not very noticeable.

_____________________________

''''03 rashed up F4i
PC III USB
-1/+2
Two brothers slip on
SpeedoHealer
Multi function Hub
LCD display from Dynojet
Custom one off triple tree, Rearsets, and Grips

''''74 cb550 Cafe Racer

(in reply to cbr600f4iftw)

Post #: 5

RE: sprockets help - 6/30/2008 2:25:48 PM

cbr600f4iftw

Posts: 9
Joined: 6/30/2008
Status: offline

ok, now i have a new issue with all of this... here are my specs. ''03 F4i with scorpion slip on, PCIII, +2 in the rear. Now in my opinion this bike should be coming up in the front like no ones business. Unfortunately, i can''t get the front wheel to come up to save my life. about the only time it comes up is at redline in 1st gear and only a couple inches. what could be the problem?

(in reply to Todd84)

Post #: 6

RE: sprockets help - 6/30/2008 4:02:41 PM

Stephens

Posts: 1007
Joined: 2/6/2006
Status: offline

Its all about how you ride and know your bike. If you want to pop a "wheelie" rev the bike up to around 7 or 8 grand pull in the clutch and the release the clutch and give more throttle. Thats what is called clutching it up. For more information about "poppin wheelies" I recommend you check out the stunters corner.

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Post #: 7

RE: sprockets help - 6/30/2008 4:03:40 PM

Maniak05

Posts: 53
Joined: 5/24/2008
Status: offline

http://www.cbrforum.com/m_596713/tm.htm

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Post #: 8

RE: sprockets help - 6/30/2008 5:23:26 PM

cbr600f4iftw

Posts: 9
Joined: 6/30/2008
Status: offline

Yeah i know i can clutch and bring it up like no other, i was hoping with all mods i could bring it up without having to use the clutch...

(in reply to Maniak05)

Post #: 9

RE: sprockets help - 6/30/2008 9:42:09 PM

Stephens

Posts: 1007
Joined: 2/6/2006
Status: offline

There is the technique called the powerband way. You get up to around 7 or 8K''s, release the throttle, letting the front end dip down for a second then you rip the throttle and the front end will come up. I started doing it the powerband way and I clutch it up, clutching it comes up faster and you have more control. But whatever you feel the most comfortable with doing is what you should practice on. Good luck :)

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Post #: 10

RE: sprockets help - 7/1/2008 11:40:25 AM

WOT

Posts: 390
Joined: 3/14/2008
Status: offline

The mods on your bike are just average, it''s not like you have some crazy mods that turned your bike into a CBR 1000. 1st gear, move your ass back in your seat, roll on the gas to like 5-7K, let off, get back on the gas when the forks rebound. NOTE: You can flip over backwards doing this!

(in reply to Stephens)

Post #: 11

RE: sprockets help - 7/1/2008 12:27:19 PM

rsracer

Posts: 44
Joined: 3/19/2006
Status: offline

7 or 8k''s is way to high. That thing will power up at 5k without any problem, just let chop the throttle when u get to 5k and then give it 3/4 throttle, should snap right up.

You can clutch it up anywhere from 3k-5k with ease. the higher hyou get the snappier your throttle will be in the wheelie. You''re better off getting up in the air with a lower rpm so you don''t wind out as fast.

(in reply to WOT)

Post #: 12

RE: sprockets help - 7/1/2008 1:17:02 PM

DatStuntinBlackMan

Posts: 2
Joined: 7/1/2008
Status: offline

I have the same bike with pretty much the same mods and it comes up fine...Do you not know how to ride or something? On a serious note, be careful...if this is your first bike you might want to get more expierence before you start "Wheelieing" around town.

(in reply to rsracer)

Post #: 13