one down ?? up

dagdowell · 03-03-2007, 01:10 AM

Hey all, I've decided to lose a tooth on the front and add one maybe two on the rear. Pretty much come to the conclusion that I don't need to be pushing the ol' girl to 160ish anymore. However, I am curious for any of you who have already changed sprockets, how much did you lose on the top end and at what gear did you feel it begin to lack ( just in case the voice comes back while I'm on I84!!)? Also, can anyone suggest a site that has some sick rear sp... I like the Vortex but wondering if that's as good as it gets?

I thought I would edit this post because while I was looking for sprockets, 520 conversions caught my eye, specifically this one...

http://www.sumofallparts.net/product...0-ad0778e4c2d9

- any thoughts would be appreciated as I am experienced enough to admit that I am not too experienced at all.

bigsissy33064 · 03-03-2007, 09:28 AM

I must have missed your point? What are wanting to gain from this? Stonger chain? Bigger burn outs? Longer wheelies? What the hell are talking about? My bike is stock, so I really don't know what those changes are gonna do for you. Better MPG? Lower RPM's? WTF?

rennsport · 03-03-2007, 09:55 AM

Quote:

Originally Posted by bigsissy33064

I must have missed your point? What are wanting to gain from this? Stonger chain? Bigger burn outs? Longer wheelies? What the hell are talking about? My bike is stock, so I really don't know what those changes are gonna do for you. Better MPG? Lower RPM's? WTF?

dropping a tooth at the front sprocket will lower your top end speed but, give you better acceleration, and at the expense of decreased fuel mileage. This is because the engine is running at a higher RPM.

bigsissy33064 · 03-03-2007, 01:15 PM

You are wise my son.........

rennsport · 03-03-2007, 07:39 PM

Quote:

Originally Posted by bigsissy33064

You are wise my son.........

Loks to me like he might want a wheelie bike...

dagdowell · 03-03-2007, 09:27 PM

Not necessarily a wheelie bike but quicker off the line and in traffic. The motorists here in Idaho suck and I'd like to know that I could blow by the idiot that wants to race me in his geo metro if I had to! Will I need a new chain if I go one down or one down two up?

mcgradypilot · 03-03-2007, 09:34 PM

Quote:

Originally Posted by dagdowell

N The motorists here in Idaho suck and I'd like to know that I could blow by the idiot that wants to race me in his geo metro if I had to!

What kind of metros do you have out there? ones with blown 454 chevys burning nitro-metane? Your FZ6 should rape anything off the line except maybe a 911 turbo or really really really suped up v-8

rennsport · 03-03-2007, 10:46 PM

Quote:

Originally Posted by dagdowell

Not necessarily a wheelie bike but quicker off the line and in traffic. The motorists here in Idaho suck and I'd like to know that I could blow by the idiot that wants to race me in his geo metro if I had to! Will I need a new chain if I go one down or one down two up?

A stock FZ6 will do a real good job of that, as long as you keep the revs up.

Tour Guide · 03-03-2007, 10:57 PM

rennsport - don't forget cut the life of the engine due to higher revs. kinda like the older cars w/o overdrive.

koozi · 03-04-2007, 07:41 AM

You guys are pretty funny

Renn says rev it up and it will run better and Tour Guide says the extra revs of a re-gear will shorten the engine life.

Does dropping to a 15/50 from a 16/48 really make that much difference in engine life? I kinda doubt it with an engine designed to run 12k rpm.

I already have the Speed Healer and am about to do the same sprocket kit that dagdowell linked to. It is the best package deal I have seen so far.
The way I see it I have never gone over 100 on this thing yet and it is likely I never will. Why keep it geared to do 140+?
I have never intentionally wheelied and don't plan to either, but it would be nice to be able to get the rush of hitting the powerband before hitting the speed limit.
More revs and less economy, from memory I think 60 in 6th is around 5k on the tach. What will it be with the sprockets? 6k? I can live with that.
I get just less than 50mpg on every tank. How much will it drop? Everything else is bone stock so I bet still in the forties someplace, not too bad.

Does anybody who has done the conversion have any real world numbers I can see to compare to my speculation. I am going to do it anyway, it is easy enough to change back if I really don't like it.

rennsport · 03-04-2007, 07:43 AM

Quote:

Originally Posted by Tour Guide

rennsport - don't forget cut the life of the engine due to higher revs. kinda like the older cars w/o overdrive.

That is an apples to oranges comparison but, how much shorter? Higher revs have not hurt Miata owners, who routinely shift at 6k, cruise in town at 4k. My Miata has 104,000 miles on it and there are some with 250,000 miles on the original engines.

A bike that has a 13.5k redline cruising at 7k, I don't think that is going to significantly shorten the life of the engine.

rennsport · 03-04-2007, 07:54 AM

Quote:

Originally Posted by koozi

You guys are pretty funny

The way I see it I have never gone over 100 on this thing yet and it is likely I never will. Why keep it geared to do 140+?

Because there are places that 140 is doable...

Quote:

I have never intentionally wheelied and don't plan to either, but it would be nice to be able to get the rush of hitting the powerband before hitting the speed limit.

Everyone aroud where I live is already going OVER the speed limit, so for me that is a moot point.

Quote:

More revs and less economy, from memory I think 60 in 6th is around 5k on the tach. What will it be with the sprockets? 6k? I can live with that.
I get just less than 50mpg on every tank. How much will it drop? Everything else is bone stock so I bet still in the forties someplace, not too bad.

Well I do not worry about fuel economy. My only concern is that I can go a minimum of 200 miles to a tank while touring.

I keep the revs up and I accomplish the same as a sprocket change, for the most part. Now on my Ducati S2R, I want to drop one tooth on the front sprocket but, that is because the bike is geared too tall from the factory for emissions/mileage reasons.

dagdowell · 03-05-2007, 10:13 PM

165 is very doable in Idaho; however, back to my original question... what are thoughts on Vortex sprockets and is there any real long term draw back from doing a 520 conversion. only reason I feel I should ask is that it seems to me if 520 should be on the bike, manufacturers would have made it stock. maybe I'm wrong, nonetheless I would like to be able to blow away at the light or peel off in traffic without the current hesitation. I was kidding, by the way, about the Metro!!

rennsport · 03-06-2007, 06:34 AM

Quote:

Originally Posted by dagdowell

165 is very doable in Idaho; however, back to my original question... what are thoughts on Vortex sprockets and is there any real long term draw back from doing a 520 conversion. only reason I feel I should ask is that it seems to me if 520 should be on the bike, manufacturers would have made it stock. maybe I'm wrong, nonetheless I would like to be able to blow away at the light or peel off in traffic without the current hesitation. I was kidding, by the way, about the Metro!!

Some manufacturers do use 520 chains as stock equipment. My S2R has a 520 chain and I think they did it to save weight, however small amount that may be. Yamaha probably chose the 530 chain for the added strength.

koozi · 03-06-2007, 07:11 AM

Vortex is a well known, quality brand of sprockets. Very popular among the dirt bike crowd. I have run them on my KTM for years because they make the only 54T I can find.
The tensile strength of the chain that comes with the Sum Of All Parts kit is supposed to be equal or higher than the stock Yamaha 530 chain. There is quite a bit of info on their ebay web store site. The only negative they wrote was about the stock chain, and even that was calling it a cost saver. I hate it when vendors run down manufacturers or their compitition, so I was glad to see that was all.

I will know all about it soon (I hope) because I ordered the 15/50 package yesterday. My only reservation right now is the rubber isolation of the stock cs sprocket does not come on the new one. I think it will be slightly noisier. I thought it might be jerkier too at first, but after some thought I think the extra pulling power will offset that.

A write up coming...