-1 vs. +2
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-1 vs. +2 - 4/1/2008 1:29:29 PM
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f4iman
Posts: 71
Joined: 5/10/2007
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I wanna get more acceleration out of my bike. What would -1 off the front due compared to +2 on the back. Is that equal? Thanks for the info.
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RE: -1 vs. +2 - 4/1/2008 3:59:31 PM
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specializedfuji
Posts: 138
Joined: 2/27/2007
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it would be a plus 3 in the back
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2008 CBR600rr red/black
-J''''''''Neer hanger light
-Ezeran license plate bracket
-Watsen flushmounts
-Powder Coated (rearsets,pass pegs/sets,subframe)
-PitBull spools and front/back lifts
-Honda racing tank pad
2002 CBRF4i red/black
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RE: -1 vs. +2 - 4/1/2008 4:07:34 PM
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cobra671
Posts: 26
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I think it's more like, +2 and a half to 3 = -1 up front. Most guys I know gear the rear to lessen the chain bind up front, but for comparison purposes, the -1 has more accelleration than +2.
I tried that combo and didn't like it for the street, but for the drag racing, it was perfect.
JMO
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RE: -1 vs. +2 - 4/1/2008 5:36:30 PM
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f4iman
Posts: 71
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I have stock now. I would like to have the max acceleration considering I do a good bit a street riding.
< Message edited by f4iman -- 4/1/2008 6:44:28 PM >
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RE: -1 vs. +2 - 4/1/2008 7:32:17 PM
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roc87
Posts: 45
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I did a -1/+1, changed the final drive ratio from 2.875 to 3.13, may not seem like a lot, but it made a huge difference in acceleration.....also dropped my average MPG by at least 8 But don't know actual difference as I only got the speedohealer hooked up last night, which BTW, you don't need to remove the side fairing nor lift the tank (unless you have some HUGE hands). Using a GPS, the -1/+1 swap came out be -14% on the speedohealer.
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05 F4i, Minus One Fender Eliminator, LED Pegs Integrated w/ Brake, Greggs signals, Shortened Two Bros CF Slip-On, Pazzo Levers, -1 +1
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RE: -1 vs. +2 - 4/1/2008 8:36:29 PM
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be vertical
Posts: 621
Joined: 8/21/2007
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1 in the front is equal to three in the back, regardless of direction. Its however hard to set a standard on. Your stock gearing should be something like 16/42... Going down one in the front will in fact do more then two in the rear, but slightly less that three in the rear. I think the equivalency is like 2.72. The best combination for street I think is -1/+1, which comes out to a little less than +4 in the rear. You do have a couple of other things going on however... The first is that you should never go down to anything less than a 15 in the front (which is -1 on most bikes). Anything smaller then that and you risk binding up your chain, which can lead to a breakage of the master link, causing the chain to snap. If it snaps, it will take off your leg, crack your block, cause you to fall, or maybe all at the same time... this is not something you want to risk, EVER! If you go too large in the rear, you will have to get a new chain, because with the stock chain I think you can only go up like +3 before the chain is not big enough to get around the sprocket. When getting new sprockets, you want to make sure that your rear wheel centers up at basically the same spot along the tensioner guide. If you change that too much, you are offsetting the wheelbase, changing the ride and reaction of the bike.
Personally I have a 15 in the front, which is -1 for me, and then I have a 43 and a 41 for the rear. Most of the time I have the 43 in there, cause I ride street 90%. On long trips however it is nice to be able to do a 80+ mpg cruise without being in the power-band (above 10k on the tach). This is where the 41 comes in. It brings me almost back to stock, allowing me to coast along on the highway without screaming my rpm head off. My only complaint about this is that with the 15/41 setup I am overall down two teeth from stock, so my wheel sits back about 1/2 inch more then it should, it is however much easier then changing the chain, as that is a real pain and cannot be done in ten minutes like a sprocket swap can.
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07 600RR ...O^o''''''''''''''''
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RE: -1 vs. +2 - 4/1/2008 9:07:02 PM
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roc87
Posts: 45
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Dang man, a 10 minute sprocket swap?! I must be doing something wrong....LOL
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RE: -1 vs. +2 - 4/3/2008 10:31:32 PM
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slatherson
Posts: 64
Joined: 4/8/2007
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quote:
ORIGINAL: be vertical
"Anything smaller then that and you risk binding up your chain, which can lead to a breakage of the master link, causing the chain to snap. If it snaps, it will take off your leg, crack your block, cause you to fall, or maybe all at the same time... this is not something you want to risk, EVER!"
< Message edited by slatherson -- 4/3/2008 10:52:30 PM >
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RE: -1 vs. +2 - 4/3/2008 10:47:21 PM
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slatherson
Posts: 64
Joined: 4/8/2007
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^^^ I had this happen to me on my first bike at well over 100mph and all it did was scratch my tail fairing. Needless to say when I figured out what had happened as I stood on the side of the freeway at six in the morning I literally got on my knees, made the cross on my chest, and KISSED the ground!!! When I look back on that it makes me nervous, and it makes me second guess owning a bike today. 80 percent of the time it's the other guys fault, 19 percent of the time it's our own fault, but ONE percent of the time, or less, it's the equipment. TAKE CARE OF YOUR EQUIPMENT!!!
Sorry didn't mean to hijack.
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