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Bikes, Hints'n'Tips => FZS600 Fazer => Topic started by: ChristoT on 29 January 2014, 11:31:02 pm

Title: Swingarm spacing?
Post by: ChristoT on 29 January 2014, 11:31:02 pm
Weird question I know, but here goes: What is the width of the swingarm at the pivot point? And how far out from the bike's centreline is the rear sprocket?

I ask because I'm making a detailled list of parts I want for a custom FZS600 I want to build when I have a bit more cash, and had a little idea I want to toy with.

Also, what are the negative effects of fitting a narrower wheel to the Fazer?
Title: Re: Swingarm spacing?
Post by: darrsi on 30 January 2014, 01:20:43 am
"...Also, what are the negative effects of fitting a narrower wheel to the Fazer?..."

Less "tyre" surface grip, there's no reason to do this at all, presuming your tyre size would change.......stop your thoughts at once!

They spend years testing this sort of stuff to get things right.......trust them, they have more time and money than us! ;)
Title: Re: Swingarm spacing?
Post by: ChristoT on 30 January 2014, 01:41:13 am
"...Also, what are the negative effects of fitting a narrower wheel to the Fazer?..."

Less "tyre" surface grip, there's no reason to do this at all, presuming your tyre size would change.......stop your thoughts at once!

They spend years testing this sort of stuff to get things right.......trust them, they have more time and money than us! ;)

That doesn't really answer the question though..  ;) The wheel I'm considering (for all sorts of reasons) takes a 150/60 R17. I'm a bit loath to fit an even wider wheel because I then have to worry about chain offset - easier to do on the back than the front.
Title: Re: Swingarm spacing?
Post by: Punkstig on 30 January 2014, 07:39:47 am
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
Title: Re: Swingarm spacing?
Post by: darrsi on 30 January 2014, 09:59:46 am
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!


That's what i was getting at.
Title: Re: Swingarm spacing?
Post by: Punkstig on 30 January 2014, 10:52:29 am
:rollin

You're the main tester - involved at all stages of this long, long project :thumbup

Cool, tonight I shall perform the "lying on the pub floor choking on my own vomit whilst logging into here on the fone" test. Always a winner. :lol
I know you was, I'm backing you up!
Title: Re: Swingarm spacing?
Post by: darrsi on 30 January 2014, 10:59:27 am
:rollin

You're the main tester - involved at all stages of this long, long project :thumbup

Cool, tonight I shall perform the "lying on the pub floor choking on my own vomit whilst logging into here on the fone" test. Always a winner. :lol
I know you was, I'm backing you up!


That's clever, how did you bring up that quote?  :lol
Title: Re: Swingarm spacing?
Post by: ChristoT on 30 January 2014, 11:08:18 am
And still no-one has replied to the OP!!  :lol :lol :lol

I'm asking because I have a bit of a thing for single sided swingarms, and I want to know what will fit. A Honda NT650 Bros sports a 150/60 R17, and I reckon it might do the job. A SSSA would also make life easier for the underseat exhaust.
Title: Re: Swingarm spacing?
Post by: Fazerider on 30 January 2014, 11:12:29 am

The swing arm pivot sleeve is 236mm long, allowing a millimetre at each end for the washer/end seal gives a total gap in the frame of 238mm.
I had to go out and top-up the chainlube, so poked around with a ruler for you: the centreline of tyre to centreline of chain measured 110mm with standard 9mm sprockets.
Title: Re: Swingarm spacing?
Post by: ChristoT on 30 January 2014, 11:20:41 am

The swing arm pivot sleeve is 236mm long, allowing a millimetre at each end for the washer/end seal gives a total gap in the frame of 238mm.
I had to go out and top-up the chainlube, so poked around with a ruler for you: the centreline of tyre to centreline of chain measured 110mm with standard 9mm sprockets.

Thanks, Fazerider!  :)
Title: Re: Swingarm spacing?
Post by: Fazerider on 30 January 2014, 11:53:28 am

Don't be too worried about the slightly narrower tyre, the reduction in contact patch won't be very significant. After all, the front copes with braking forces that are just as great as the rear gets from the engine.
There may even be a slight handling benefit: the contact patches of front and rear are out of line with each other when banked over… the more similar in width the tyres are, the less misalignment there will be.
Good luck with the project, I hope you can get things to fit.
Title: Re: Swingarm spacing?
Post by: ChristoT on 30 January 2014, 12:07:42 pm

Don't be too worried about the slightly narrower tyre, the reduction in contact patch won't be very significant. After all, the front copes with braking forces that are just as great as the rear gets from the engine.
There may even be a slight handling benefit: the contact patches of front and rear are out of line with each other when banked over… the more similar in width the tyres are, the less misalignment there will be.
Good luck with the project, I hope you can get things to fit.

First I need a bike to fit stuff to!  :rolleyes

This is an idea I've had kicking about for about a year. I've been working on details in my mind, I hope to get to build it!
Title: Re: Swingarm spacing?
Post by: Punkstig on 30 January 2014, 04:26:20 pm
:rollin

You're the main tester - involved at all stages of this long, long project :thumbup

Cool, tonight I shall perform the "lying on the pub floor choking on my own vomit whilst logging into here on the fone" test. Always a winner. :lol
I know you was, I'm backing you up!


That's clever, how did you bring up that quote?  :lol
No idea, lols!
Title: Re: Swingarm spacing?
Post by: darrsi on 31 January 2014, 09:03:31 am
And still no-one has replied to the OP!!  :lol :lol :lol

I'm asking because I have a bit of a thing for single sided swingarms, and I want to know what will fit. A Honda NT650 Bros sports a 150/60 R17, and I reckon it might do the job. A SSSA would also make life easier for the underseat exhaust.


Isn't that a shaft drive swing arm?


My previous bike was an NTV Revere 600 which is from the same family.
Title: Re: Swingarm spacing?
Post by: ChristoT on 31 January 2014, 01:37:11 pm
The 650 Bros isn't, but the Deauville (also called NT650) is a shafty.
Title: Re: Swingarm spacing?
Post by: darrsi on 31 January 2014, 02:16:26 pm
The 650 Bros isn't, but the Deauville (also called NT650) is a shafty.


I actually miss the shaft drive, the bike was so damn clean!
Title: Re: Swingarm spacing?
Post by: Lumpy on 03 February 2014, 08:15:21 am
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip, a fzs600 is never going to light the rear end up so there will be enough grip there anyways.


Try is Christo, even if it looks odd.
Title: Re: Swingarm spacing?
Post by: Punkstig on 03 February 2014, 08:37:23 am
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!
Title: Re: Swingarm spacing?
Post by: Lumpy on 03 February 2014, 11:02:49 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!
lots of kafas out there. Do what you want. Too many darrsi types out there trying to put imagination  off and stuff.
Title: Re: Swingarm spacing?
Post by: ChristoT on 03 February 2014, 11:07:26 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!
lots of kafas out there. Do what you want. Too many darrsi types out there trying to put imagination  off and stuff.

Well, when I get another Fazer, I intend to try! I just like to know what the pros and cons of each system are before I start.  :)

Hopefully, it'll be a reasonably simple task to swap everything over. Sooo, anyone want to give me a bike to try this on?  :D
Title: Re: Swingarm spacing?
Post by: His Dudeness on 06 February 2014, 08:58:28 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!
lots of kafas out there. Do what you want. Too many darrsi types out there trying to put imagination  off and stuff.

What does that mean? Got a problem with someone expressing their opinion?
Title: Re: Swingarm spacing?
Post by: Punkstig on 06 February 2014, 09:02:54 pm
I'd just like point out that's not my quote!
Title: Re: Swingarm spacing?
Post by: ChristoT on 06 February 2014, 09:07:51 pm
A bit defensive there, Stig!   :lol

It takes all sorts. Having a few sensible Darrsi types curbing my insanity is a good thing. I wish more had been around before that insane trailer idea!

By the way - who wants to buy a towbar?  :rollin :rollin
Title: Re: Swingarm spacing?
Post by: ChristoT on 11 February 2014, 01:49:06 pm
More good news!! Looks like I struck gold on that Bros: rough measurements poking around with calipers over lunch break have told me the swingarm width is about 235.25mm (not sure how accurate my measurements were) , and the wheel to centreline is roughly 115mm. Happy days.  :)

EDIT: Butter fingers! I mean sprocket to wheel centreline. Still happy days. :)
 
Title: Re: Swingarm spacing?
Post by: Deefer666 on 11 February 2014, 05:58:20 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!

Because you can?
Title: Re: Swingarm spacing?
Post by: darrsi on 11 February 2014, 08:10:53 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!
lots of kafas out there. Do what you want. Too many darrsi types out there trying to put imagination  off and stuff.


Only just seen this reply, not quite sure what you mean by that comment, just you being a miserable git as usual i s'pose?
Title: Re: Swingarm spacing?
Post by: Punkstig on 11 February 2014, 09:31:52 pm
As I said above- that's not my comment!!!
Title: Re: Swingarm spacing?
Post by: darrsi on 11 February 2014, 10:12:24 pm
As I said above- that's not my comment!!!


 :lol
Title: Re: Swingarm spacing?
Post by: paulchucky on 18 February 2014, 10:00:06 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!






fzs600 never gunna light the rear up ?????????????  wanna take a ride with me !!!!!!!!!!!!!





Title: Re: Swingarm spacing?
Post by: ChristoT on 18 February 2014, 10:03:14 pm
Knowing my fondness for the right wrist, maybe I should start researching traction control....  ;)
Title: Re: Swingarm spacing?
Post by: Punkstig on 18 February 2014, 11:21:42 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!






fzs600 never gunna light the rear up ?????????????  wanna take a ride with me !!!!!!!!!!!!!

Dear lord, can you at least put the right quote up to what you're responding to so I don't get pointless notifications saying I've been 'quoted'
Thankyou!
Title: Re: Swingarm spacing?
Post by: Lumpy on 19 February 2014, 01:40:45 pm
I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!






fzs600 never gunna light the rear up ?????????????  wanna take a ride with me !!!!!!!!!!!!!
no thanks, I'm straight.