Clunk, clunk

[planedick]

Well, now I know why the 750 final started making noises.



I guess it just isn't strong enough for the 1100 and the way I ride...

[motoman]

That's fugly..............imagine the housing flexing around oinion area didn't help it any. U gonna try the 850diff. since the casting is gusseted a bit heavier Richard?

[natemoen]

Ouch! That looks nasty!

[planedick]

Maybe

I'm thinking about putting on an 850 as I really do miss that upper gear. Now I'm always feeling the shifter to make sure I'm in the top one as it always seems the rpm's are too high. Also, I did get a lot of hard miles on that one. I'm not sure how I could tell if it was an 850 being sold and so many of the sellers aren't sure or don't know the differance.

[BA80]

I've had my 850 FD in mine for over 2 years and many, many miles now and it's still going strong.


And I'm about as NOT nice to it as you can imagine.

[planedick]

Ok

I just ordered a XS850 final with 14K miles on it for $56 including shipping.

[soccer4m]

easy final drive

Howdy Planedick,,,,,I still wonder why all the xs folks are using the 750 and 850 final drives when just popping on a xs750 rear rim, which is a direct fit, does the same thing with a lot less worry and hassle.
Had one on the midnight special and it really drops the revs, and didnt have to worry if the drive was going to die on the road. Good luck with the other drive,,,,,if all else fails,,,,pop on the xs750 rim and get the same thing. I dont think there are too many final drives that can hold up to the high speeds and abuse you do to these machines,,,,,last time I saw you riding it was a blur going by. Mike in Sun Diego

[jwhughes3]

+1

Planedick you were a blur going by in Utah at over 100mph after the Durango Rally last year.


Keep on going fast....


John

[jjz28]

i was thinking my xs750 rim was the same size as my xs1100.

[Eveready1100]

No, they are 18 inchers as opposed to your 16 on your Special. Just watch the width as they are a fair bit skinnier. You may have issues if you try to fit a 130/90 - 18 on it as it will make the sidewalls tuck in a lot.

[jayel]

interesting, as you say the down side would be the smaller cross section of the tire but bikes with 18 inch rears generally handle better in the corners than 16's which are better for straight line cruising... did a search and found this.....
According to the formula for a circle, the circumference of the circle is Pi times the diameter. In this case, multiply 16 times 3.14 to get 50.24 inches. Increasing the wheel size to 18 inches makes the circumference 56.52 inches, so the tire travels about 6 inches further to complete each revolution. The difference is about 11 percent

[fredintoon]

interesting, as you say the down side would be the smaller cross section of the tire but bikes with 18 inch rears generally handle better in the corners than 16's which are better for straight line cruising... did a search and found this.....
The difference is about 11 percent

Hi jayel,
you gotta use the tire ODs not the rim sizes.
Say the fattest tire that'll ride nice on the XS750s narrower rim is a 120/90-18,
that puts the OD at ~26.45"
Comparing that to the Special's 130/90-16 tire OD of ~25.2" gives a ~5% increase.
BTW, my son's XS750 recently fragged itself and I think it's rear wheel & FD are still available.

[soccer4m]

old rim thread versus swapping mids

Hi, I started a rim thread a couple years back when I bought a xs1100 midnite and it had the 18 inch rim on it and wondered what it was and why the former owner did it. For those interested, go through the old threads,,,,anyway, it had a Bridgestone Spitfire s11 on it,,,,130'90-18 and it was great for dropping the revs down. It did sit one inch higher but I never noticed the diff.with my fat axx sinking the shocks.
bridgestone spitfire 18 "tire circumference.= 86 inches versus
dunlop d401 16" tire circumference. = 79.7 inches for the reg. rim...around 9.3% drop in revs. throughout the riding range.

so it gives better engine rev savings as dropping in a 750 or 850 drive. I still wonder why so many have replaced their mid drives with all the complaints and heartache instead of an easy to replace rim If you ride like a manic, I dont, I guess the larger tire sidewall could flex a bit more, but at speeds under 125 and some severe curve riding I never had a problem......whatever members want to do. Only default is starting in 1st requires a bit more rev to get going.Its great to see members experimenting and trying all the variables to save some revving, but for me, the rim swap is the way to go...Mike in Sun Diego.

[bikerphil]

Mike, I'm interested in how the 18" rim looks on the Special, could you post a pic when you have a chance?

Edit: Ok I found your old thread with a pic.

http://www.xs11.com/forum/showthread.php?t=17688&highlight=rear+wheel&page=3

[soccer4m]

18 rim

Hi Bikerphil, glad you found the thread, the tire is the old one and was replaced with a 130 size. The overall look is the same, the 130 is a bit wider but rides better with more road contact. The rim is the same spoke as the 1100 xs, I have an xj I would love to put on but the rims on the xj are the swirly ones and it would look strange with straight spoke and swirly on the same unless I swap out both front and back,,,,anyway its an easy upgrade to really drop the rpms without all the hassle of switching gear drives...............Mike in SUn DIego