RE: Sprocket/520 Change? Where to get? and Which?
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RE: Sprocket/520 Change? Where to get? and Which? - 6/28/2008 12:02:56 PM
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SpecR
Posts: 308
Joined: 10/19/2007
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-1 +2 is the equivalent of a +5 in the rear.
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RE: Sprocket/520 Change? Where to get? and Which? - 7/1/2008 12:27:09 AM
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lazer_fin
Posts: 7
Joined: 5/17/2006
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yes. -1 is equal to +3 in the rear according to a dealer.
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RE: Sprocket/520 Change? Where to get? and Which? - 7/1/2008 12:30:25 AM
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lazer_fin
Posts: 7
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I have the RK 520 conversion with -1 front and stock rear, I think its a perfect combination. Its not too low geared yet it wheelies very well. I max out first gear at 45 mph.
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RE: Sprocket/520 Change? Where to get? and Which? - 7/1/2008 3:26:27 AM
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SpecR
Posts: 308
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You''re better off with a stock front and +3 in the rear, because you gain effeciency (and more torque on the rear end) when you have bigger sprockets.
But I personally think +2 on the rear is too much unless you only do very hard riding (and no long trips at all). ~7,000 RPMs at highway speed is ridiculous...
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RE: Sprocket/520 Change? Where to get? and Which? - 7/7/2008 4:41:58 PM
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Mefloump
Posts: 18
Joined: 7/7/2008
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I am running -1 in the front and +4 out back and other than I can wheelie in about any gear, have had no problems with vibration. I can tell you though, it is a real rocket ship no matter what gear you are in. My engine is not stock, and may be the difference. 70mph buzzes about 7k rpm in 6th gear. The coolest thing about it is, the tach and speedo climb at the same rate.
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RE: Sprocket/520 Change? Where to get? and Which? - 7/10/2008 2:41:51 PM
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jnos17
Posts: 61
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From: G''Ville S.C.
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I was chhanging my sprockets and chain. i wanted to do the -1 in the front and stock in the rear. the guy told me if i did that my speedo would read 5mph off but if i did +3 in the back it would be fine. all i want is more acceleration not wheelies, so would 3 in the back be too much or should i do a 2 in the back. and is a 520 chain needed for +2 or 3+ in the back?
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RE: Sprocket/520 Change? Where to get? and Which? - 7/10/2008 3:24:06 PM
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elmer
Posts: 446
Joined: 12/9/2006
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When I first got my bike it had a -1/+2 kit on it. If you cranked on it the front end would want to power its way up, not enough to get much off the ground, but enough to make the front shake a little bit. I personally wasn''t a fan, and since I didn''t wheelie I just replaced them with stock all the way around. If you want to quicken things up, I''d say just the +2 in back is going to make a noticeable difference. I thought the -1/+2 made the bike twitchy on the street and I''d be cautious when getting on the gas hard. I''d consider going back to just the +2 in back if the chain and sprocket needed replaced, but since it doesn''t need it I won''t.
I also remember at some point it being explained to me that it was better to go up in the rear rather than going down on the front if you were only planning on doing one sprocket. Though the reasoning I was given was that the smaller sprocket on the front increased the degree in which the chain would have to fold and contribute to premature wear. No idea how much truth there is to that, but I can definitely see if someone was going down more than 1 tooth in the front.
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RE: Sprocket/520 Change? Where to get? and Which? - 7/11/2008 2:08:20 PM
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Mefloump
Posts: 18
Joined: 7/7/2008
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"quote:
I was chhanging my sprockets and chain. i wanted to do the -1 in the front and stock in the rear. the guy told me if i did that my speedo would read 5mph off but if i did +3 in the back it would be fine. all i want is more acceleration not wheelies, so would 3 in the back be too much or should i do a 2 in the back. and is a 520 chain needed for +2 or 3+ in the back?
The speedo on a F2 is run off the front tire and is not affected by changing your gear ratio. the speedo on a F3 is run off the transmission, so changing the sprockets will definitely affect how the speedo read. So if you have a F2, the "guy" was wrong either way you look at it.
Question 1=how much acceleration do you want? You would notice a change in acceleration going +3 in the rear.
Question 2= 520 chain and sprockets are not needed but much lighter, and affects the rolling mass. Less rolling mass helps put more power to the pavement.
_____________________________
You can always go faster!!
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RE: Sprocket/520 Change? Where to get? and Which? - 7/12/2008 7:37:02 PM
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jnos17
Posts: 61
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From: G''Ville S.C.
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Mefloump;
1. As far as acceleration, I have to change the chain and sprockets anyways...I feel that the bike could be alot more responsive for a 600. I might be wrong but thats what i feel.
2. I met a guy that was a crew guy for motorcycle team and he said that i should leave the gear ratio the same but to still change the sprockets. He said to take the stock rear size (43) and divide it by the front (15) which equals out to be a ratio of 2.86. So that meant the if I took the rear sprocket down to a 40 and made the front a 14 that would make the same ratio but had less teeth and the bike would accel better.
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RE: Sprocket/520 Change? Where to get? and Which? - 7/28/2008 8:47:32 PM
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Mefloump
Posts: 18
Joined: 7/7/2008
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jnos17;
I just changed my rear sprocket again. I am now running -1/+7 (14/50) making it a ratio of 3.57. This thing is a rocket ship and will hang with 1000cc''s. The crew guy might be right but if you go too small, the chain will wear through the plastic guide on the swing arm. If you want to accelerate faster, start with -1/+3. If that is not enough, go bigger in the rear. Just remember that the more teeth you add in the rear requires a longer chain. Take the number of teeth change, divide by 3, then add 1 link.
If that is still not enough, I would consider doing some engine work and carb work.
_____________________________
You can always go faster!!
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RE: Sprocket/520 Change? Where to get? and Which? - 7/30/2008 7:37:42 PM
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jnos17
Posts: 61
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From: G''Ville S.C.
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Mefloump; -1/+7 (14/50) making it a ratio of 3.57..
Doesnt that mean that the front sprocket has to spin three almost four times before the rear spins once? You said that the acceleration is awesome and you can keep up with 1000cc bikes. I''m new to bikes and that seems really hard to beleive, but not saying that it wasnt done.
1. Why bring the front down at all?
2. Have you checked the top speed on the bike after the install?
3. How well can you keep up with 1000cc bikes?
4. Keeping up with them in what aspect? accel,corners or all of the above?
5.I still can''t beleive you can keep up and if it is possible i want to know how because im tired of being called the slow 600 infront of the 1000rr, zx10r and the r1...I''m the little guy :(
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RE: Sprocket/520 Change? Where to get? and Which? - 7/31/2008 9:09:43 PM
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Mefloump
Posts: 18
Joined: 7/7/2008
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First you need new friends if they make fun of you for riding a 600, second you are correct is saying the front sprocket spins 3.57 times to 1 revolution of the rear sprocket. Third acceleration wise it will hang right next to a 1000cc. Keep in mind that I have extensive engine, carb, and suspension work done. I am riding a retired race bike that has been put back on the street. I have dyno proven 105hp at the rear wheel. That is almost the most you can get out of a F2 motor with out playing with nitrous or turbo.
1. I needed to change sprockets anyways and wanted to try it.
2. Top speed is estimated around 135mph. Baised on how the speedo chases the tach, 7,000=70mph=redlines at 13,500=135mph
3. Head to head, all of the above.
4. see above answer
5. Put 2mil over pistons in, degree the cams, full exhaust, port and polish the head, and change the gearing, your friends wont believe how fast you little 600 is.
Perspective: My good friend rides a 04 ZX636, even with stock front and +3 rear, my bike is faster, now it is no contest. Another friend that still races has a 04 R1 (bone stock) with my current setup we are neck and neck until I run out of rpm.
The point I am trying to make is play around with it until you have fun riding it. It doesn''t matter what other people say or do.
_____________________________
You can always go faster!!
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RE: Sprocket/520 Change? Where to get? and Which? - 8/10/2008 5:38:11 AM
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jnos17
Posts: 61
Joined: 7/5/2008
From: G''Ville S.C.
Status: offline
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As far as making fun of me, it''''s not because they want to make fun of a 600 but its the fact that they told me that i would get tired of a 600 and now that i am getting tired of the acceleration, they said that they told me so.
"5. Put 2mil over pistons in, degree the cams, full exhaust, port and polish the head, and change the gearing, your friends wont believe how fast you little 600 is. "
How much will that cost me? I''''m not worried about the port and polish but the pistons i cant find. any special place to get them?
< Message edited by jnos17 -- 8/10/2008 5:40:01 AM >
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