View Full Version : Calling Jonboy!
Sorry mate, couldnt work out how to private message you and if anyone else has an opinion please feel free to post it!
Im off to get me a new chain and sprocket set tomorrow and ive heard you proudly going on about your one for quite some time, so I thought id get me one of whatever it is you have on yours!
Can you tell me the spec of it? i think its less teeth, more torque and wheelies from 3000 rpm?
Sign me up 8)
what bike model do you have?
Usaly the guide is up +1 or +2 on the rear when you are going for new sets.
I've got a 46 tooth on the rear that's all (with a 110 link chain). Try it, you'll probably like it (and yes, in first, my SV will wheelie at 3k revs if you snap open the throttle - but I do have the ignition advanced 4 degrees which supposedly makes the torque lower down).
Don't expect 30 extra BHP, just snappier acceleration - particularly in first and second.
.
I know its irresponsible but I just want my sv ( pointy 04 ) to wheelie a bit easier but not be soooo out of control
So any suggestions are welcome, I rarely do over 100mph so top end isnt an issue
Go +2 +3 on the rear or +1 on the front which is roughly equal to +3 on the rear but will wear out the chain faster.
Filipe M.
04-05-06, 03:24 PM
Go +2 +3 on the rear or +1 on the front which is roughly equal to +3 on the rear but will wear out the chain faster.
TSM, typo... it's -1 on the front.
Sid Squid
04-05-06, 03:26 PM
Go +2 +3 on the rear or +1 on the front which is roughly equal to +3 on the rear but will wear out the chain faster.
Err...no. +3 on the rear is very approximately -1 on the front.
Woops typo, thats what i ment, -1 not +1.
so I want to drop 1 tooth on the front correct? How many teeth does the standard sprocket have?
Sorry slightly confused
so I want to drop 1 tooth on the front correct? How many teeth does the standard sprocket have?
Sorry slightly confused
Standard sprockets on the SV are 15 teeth on the front and then 44/45 teeth on the back depending on whether you have the S/N version of the SV.
-1 on the front is approximately +3 on the back, which Sid Squid posted above, but going up on the back is, as far as I'm aware, better if you want the chain/sprockets to last longer compared to going down on the front, and you'll be able to use the standard Suzuki front sprocket with the rubber damper on it which takes out some of the vibes and will probably last longer than most other brands.
I personally find the 47t sprocket very controllable, I was even disappointed to start with as I thought it would make the SV wilder than it did, so anything less isn't worth it IMHO as you'll just regret it the minute you ride away after having the chain/sprockets fitted.
Flamin_Squirrel
04-05-06, 05:13 PM
Although I cant imagine it would be a good idea to get a 14t front or a 47t rear if you ever go near the motorway.
Although I cant imagine it would be a good idea to get a 14t front or a 47t rear if you ever go near the motorway.
Why? :?
Flamin_Squirrel
04-05-06, 05:17 PM
Higher revs resulting in reduced fuel economy and more vibes, obviously.
Higher revs resulting in reduced fuel economy and more vibes, obviously.
I've not noticed much of a difference in fuel economy, maybe 1-2mpg if that and that's thrashing it between lights all the time, and definitely not much more vibes either, but then I do have the Suzuki sprocket with the rubber damper on it.
Sid Squid
04-05-06, 06:06 PM
...not much more vibes either, but then I do have the Suzuki sprocket with the rubber damper on it.
The rubbery bits on the standard sprocket are to reduce noise, not vibes.
FS has a point though, if you lower the gearing, at any given speed the revs go up, (yes, you know this I know), whether the revs rise as far as being a problem depends on the amount of change, and how the individual feels about it, I suspect a difference of a few hundred wouldn't be a problem - but it depends on the specific use to which you put the bike, and how hard you are :lol:
Tahir's fookin 'ard.
Flamin_Squirrel
04-05-06, 06:36 PM
Higher revs resulting in reduced fuel economy and more vibes, obviously.
I've not noticed much of a difference in fuel economy, maybe 1-2mpg if that and that's thrashing it between lights all the time, and definitely not much more vibes either, but then I do have the Suzuki sprocket with the rubber damper on it.
Since when where there traffic lights on the motorways?
Scooby Drew
04-05-06, 07:03 PM
If the speedo is driven off the gearbox, it will also give false readings. You will need one of these (http://www.speedohealer.com/eng/intro.htm) if this is the case.
So what should I expect from the 47 tooth rear sprocket, my SV happens to be exactly like yours - is it even worth it?
Since when where there traffic lights on the motorways?
I never said there were, but in your first post you wrote "although I cant imagine it would be a good idea to get a 14t front or a 47t rear if you ever go near the motorway." , which I think is very different to saying if you're a regular motorway user, as what you said includes those who occasionally or very rarely use them, like myself. Hence riding in the city would have a far greater affect on fuel economy than riding on the motorway because of all the stop-start riding and the mini races between traffic lights instead of the smooth riding at a constant velocity that you would be doing on motorways, and I was pointing out how it doesn't make that much of a difference.
If you are a regular motorway user then yes you are making a good point, but this has been discussed in the past so anyone who frequently uses the motorway should be thinking about increasing rather than reducing the gear ratio anyway as acceleration wouldn't be that important.
The rubbery bits on the standard sprocket are to reduce noise, not vibes.
Ah, thanks for clearing that up. :oops:
...whether the revs rise as far as being a problem depends on the amount of change, and how the individual feels about it, I suspect a difference of a few hundred wouldn't be a problem - but it depends on the specific use to which you put the bike, and how hard you are
Tahir's fookin 'ard.
Yeah right :D. I just think on a standard bike it's not a huge change, and if you work out the ratio it's actually a very small change in ratios, so you don't have to be hard, you just have to get over the placebo affect of thinking it's a lot better than it really is.
So what should I expect from the 47 tooth rear sprocket, my SV happens to be exactly like yours - is it even worth it?
If you need to change your chain/sprockets then, as long as you're not regularly using motorways, you might as well do it as it's not going to cost you more really, but I wouldn't spend the money getting the chain/sprockets changed just because you want to try and get better acceleration.
paulthewitt
05-05-06, 06:09 PM
on a K3 where is the speedo readout from?
is it from the front wheel or the gearbox?
and wold it affect the read out if oyu changed the cog size?
The speedo is driven is off the front wheel on the SV650 so changing sprockets will not affect it and therefore a speedo healer is not needed.
paulthewitt
08-05-06, 06:49 AM
The speedo is driven is off the front wheel on the SV650 so changing sprockets will not affect it and therefore a speedo healer is not needed.
thanks. may look into it when changing c&s next.
on a K3 where is the speedo readout from?
is it from the front wheel or the gearbox?
and wold it affect the read out if oyu changed the cog size?
Yes it would.
The SV takes the drive from the front wheel as has been stated. Larger rear sprocket means better acceleration. This may cause the front wheel to lose contact with the road surface. Without this traction on the front wheel, it will start to spin slower hence false readings on the speedo.
:wink:
Filipe M.
08-05-06, 07:36 AM
on a K3 where is the speedo readout from?
is it from the front wheel or the gearbox?
and wold it affect the read out if oyu changed the cog size?
Yes it would.
The SV takes the drive from the front wheel as has been stated. Larger rear sprocket means better acceleration. This may cause the front wheel to lose contact with the road surface. Without this traction on the front wheel, it will start to spin slower hence false readings on the speedo.
:wink:
Quite right.
Moving it to the back wheel / gearbox won't help that much either when you actually spin up the rear tire due to the shorter gearing, giving you again a false reading.
:wink:
So I'd say you'd be better off with 2 or 3 sensors (front & back wheel + gearbox) connected to a computer, which would instantly average them and give a somewhat more precise reading.
Or get a yourself a f'in GPS. :wink:
Higher revs resulting in reduced fuel economy and more vibes, obviously.
I used to run a 14t front sprocket. On the motorway it was terrible. The bike revving around 1000rpm more than normal, resulting in higher fuel consumption and a really stessfull motorway journey...however, around town, it was fantastic :D
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