[Daimler-Maybach]

who has gone down in sprocket size? just wondering how the bike's torque is effected. want a little more top speed out of my bike, but if it totally kills the torque then f it

 

[enrico vespa]

down in the front or rear?

If you go down a tooth in the front, you'll have more pull down low, but loose some at the top.

 

[dan46n2]

If you have stock gearing, which IIRC is a 44T rear and you go down a few teeth I dont think you'll really gain all that much on the top end... The SV is really speed-limited by its power and its ability to overcome the drag created at those speeds.

 

[bpage08]

I have a s model and had a almost new naked front and rear which is geared higher if I remember right. Top speed isn't much higher or any but interstate RPM is a bit lower.

 

[doxiedog]

A 16 in front only drops rpm on hyway 400rpm,but makes the gears longer. Performance doesn't suffer very much. If you didn't know,you wouldn't notice.

 

[Bob_M]

I've gone 2+ in the front and -1 in the rear and like it. (17/43) At 5000 rpm, I'm doing an indicated 80 mph in 6th gear with the stock front tire 120/60/17. I've only had the bike up to 130+, but ran out of clear road.

 

[weasel]

i'm -2 in the rear on my nekkid, helps on the long slab rides, i haven't really noticed any loss of 'takeoff' power, just a couple hundo rpm lower...

 

[LSCYCLING]

I have a naked so stock was 15x45 I liked it. switched to a 15x47 it topped out on the highway at like 100 or something and at cruising speed it was just rev'ed so high. I then switched to a 16x47 (from my understanding is close to a 15x44) and liked it a lot. Currently I'm switching to a 15x41 but have to get a master link. I'll let you know when I've ridden a bit.

 

[Jawn]

I wanted more tork so I filed off one of the teeth on my front sproket. I haven't noticed any difference. :dontknow:

Trying to figure out how I can add some teeth to the rear, maybe that will help.

 

[wacky_woodchuck]

I wanted more tork so I filed off one of the teeth on my front sproket. I haven't noticed any difference. :dontknow:

Trying to figure out how I can add some teeth to the rear, maybe that will help.

JB Weld? :dontknow:

 

[Lost1888]

JB Weld? :dontknow:

Mighty Puddy?:dontknow:

 

[RandyO]

I've gone 2+ in the front and -1 in the rear and like it. (17/43) At 5000 rpm, I'm doing an indicated 80 mph in 6th gear with the stock front tire 120/60/17. I've only had the bike up to 130+, but ran out of clear road.

you also ran out of HP, the 650 can't push any more air out of the way

I found my best gearing at 16/46, went up one in front, I liked it but lost a bit more zap than I wanted to so I went up one in rear too, that gearing puts you on the borderline of needing a longer chain as well, never attempted a top speed run with that gearing but with stock 15/45 gearing, I was able to go faster in 5th (128.6 on calibrated sigma/135+ observed) than in 6th (only 125 or so)

 

[HispanicPanic]

If 130 is about the max an sv can go due to power, then what would be the optimal gearing that would max out at 130?

 

[Bob_M]

This is a chart that was posted by another member here a while back.

 

[RichDesmond]

If 130 is about the max an sv can go due to power, then what would be the optimal gearing that would max out at 130?

Impossible to say for certain without a dyno chart for your bike. You need to gear so that it just barely pulls up to the power peak, so you need to know exactly where that is.

There's enough bike-to-bike variation that a tooth on the rear more or less may be needed.