final drive swap

[3Phase]

Cy, the later late-model Type II 850 ring gear might work a little better but the problem is that the side cover on the 750/850 final drive is not as stout as the one on the 1100.

The 750/850 side cover flexes and balloons a few thousandths under load, loading and unloading the carrier bearing and changing the lash and pinion contact as the ring gear tries to crawl away from the pinion. I'd post some pictures of the cracking and checking in the aluminum side cover on the bad 750 drive but I'm sure you've (all) seen small fatigue and stress cracks in aluminum before and I'm not really in the mood. It would be an anticlimactic end to a beautiful weekend and a total buzzkill.

I've been cutting trees; fixing the tach and speedometer on my '79 Special; dating a couple of chicks; making a few mods on Columbo and generally having a really good time this weekend. I have a pretty thick skin and I'm not made out of sugar but having Randy call me a crazy liar again to my face and then crack some more tasteless jokes all over the forum after I posted more pictures showing more damage to the final drive will have to wait until a certain hot place freezes over or after I finish my beer. (burp)

[cywelchjr]

Cy, the later late-model Type II 850 ring gear might work a little better but the problem is that the side cover on the 750/850 final drive is not as stout as the one on the 1100.

The 750/850 side cover flexes and balloons a few thousandths under load, loading and unloading the carrier bearing and changing the lash and pinion contact as the ring gear tries to crawl away from the pinion. I'd post some pictures of the cracking and checking in the aluminum side cover on the bad 750 drive but I'm sure you've (all) seen small fatigue and stress cracks in aluminum before and I'm not really in the mood. It would be an anticlimactic end to a beautiful weekend and a total buzzkill.

I've been cutting trees; fixing the tach and speedometer on my '79 Special; dating a couple of chicks; making a few mods on Columbo and generally having a really good time this weekend. I have a pretty thick skin and I'm not made out of sugar but having Randy call me a crazy liar again to my face and then crack some more tasteless jokes all over the forum after I posted more pictures showing more damage to the final drive will have to wait until a certain hot place freezes over or after I finish my beer. (burp)

Point. However, that visible difference may not be the only one. The 850 drive was made for the 850, a stronger engine than the 750, even if only by a bit, so it may have other structural enhancements as well that are not visible without a teardown. I'm sure it's still a weaker drive than the 1100 drive of course, but it may well not flex near as much as the older type II and type I drives. For that matter, without evaluating it, we all know that the collar might make more difference than anybody realizes. Without setting up some sort of high speed camera setup to film what is happening down there with each drive type under load, we can only surmise what is happening based on the evidence left behind on the gears as wear patterns. That would be cool to get the timewarp guys to do, film what the FD does under load, so you could actually see the flex in realtime .

[3Phase]

My sincere apologies to the OP of this badly sidetracked thread!

When I get my mitts on one of the improved Type II 750/850 final drives it's getting the full treatment before installation including: dye penetrant testing of the housing, side cover, bearing races and gears; full dimension and wear checks; bearing peloads checked; ring and pinion lash and contact pattern checked; you get the idea.


Launching headlong into archaic sciolism, here's an XS11 with a non-exploding stock final drive:





There might be a few almost imperceptible performance changes to an XS11 and some riders after the 750/850 final drive mod:

http://twitpic.com/5n6gbl

[DAVINCI]

further adventures of the thread that wouldn't die.....

I do believe that those of us with the final drive conversion were just referred to as GIRLIE-MEN.

OOOH...I'm gonna tell T.C.!! nyaah, nyaah

[cywelchjr]

Then I guess he just referred to himself as a girlie man, since he's going to be putting another 750 FD on Columbo. Frankly, I could think of worse company to be in. Maybe we can get the Govenator (former) to ride and XS11 in his next terminator movie .

[planedick]

Hardley's

Hardleys are easy. I even dusted one of them Hardly water cooled (V-rod)drag bikes. He got me off the line, but when we went accross the crosswalk on the other side of the intersection, we were even and I was going faster than he was. From that point on all he saw was tailights and license plate as I dissapeared. First gear gets me 60 mph at 9,000 rpm somewhere around 2.5-3 secs.

[TopCatGr58]

Hey Fellas,

Apologies weren't expected or requested. I'm not trying to be an overbearing MOD. As was stated, it's been difficult to distinquish some of the "negative" comments as being merely "ribbing" vs. other intentions!

I and the other mods, as well as probably the rest of the membership would like to see the "fun" return to the postings, tongue in cheek remarks, good witted humorous jabs, etc.!

I think quite a bit of good information has resulted from this thread, and looks like more will be coming.
Scott, that picture I think is from the fellow that reported TWISTING driveshafts....it's TURBOED, so yeah, no exploding going on there, but that sorta shows how strong the OEM FD was built, to be able to withstand those types of forces/loads without failing, yet the driveshafts failed/twisted!

Carry on!

PS, Randy, you're not a Girlie-Man...you've got a Standard....now those with
those "swirly/girlie" spoked wheels.....hmmm

[DAVINCI]

Whew! That's a relief, T.C. For a while there, I thought the fun had completely dried up here. Looking forward to seeing you and all my friends at the next XSEast.

[xsroadrunner]

Hey Fellas,

Apologies weren't expected or requested. I'm not trying to be an overbearing MOD. As was stated, it's been difficult to distinquish some of the "negative" comments as being merely "ribbing" vs. other intentions!

I and the other mods, as well as probably the rest of the membership would like to see the "fun" return to the postings, tongue in cheek remarks, good witted humorous jabs, etc.!

I think quite a bit of good information has resulted from this thread, and looks like more will be coming.
Scott, that picture I think is from the fellow that reported TWISTING driveshafts....it's TURBOED, so yeah, no exploding going on there, but that sorta shows how strong the OEM FD was built, to be able to withstand those types of forces/loads without failing, yet the driveshafts failed/twisted!

Carry on!

PS, Randy, you're not a Girlie-Man...you've got a Standard....now those with
those "swirly/girlie" spoked wheels.....hmmm

Dang..i got them swirly wheels

[Bonz]

I thought guys with the FD swap were considered "thinking men", "sophisticated", "not afraid to step outside the box" and most importantly "not using their bike as an, uh, extension of themselves" whatever that may be they are extending...

But definitely not Girlie Men!

[jwhughes3]

swirly wheels

Howard,
I think TC referred to those with the "swirly wheels" as "Girlie Men" and those with straight spokes as more "Straight-Laced" (pun intended)

But while I don't have the swirly wheels, I don't think there is anything wrong with that (Seinfeld fans inset snicker here) and feel like in the vein of Rodney King maybe we could all just "get along" swirlies and non-swirlies

John

[Bonz]

I kinda caught that, just thought I'd stir the pot...

[motoman]

Dang..i got them swirly wheels
Ben, fortunately, yours don't swirl much settin'...........too much devotion to the ST..........

[xsroadrunner]

Dang..i got them swirly wheels
Ben, fortunately, yours don't swirl much settin'...........too much devotion to the ST..........

1982 XJ 1100 orig owner 29 yrs old with 33k orig miles
2001 Honda ST1100...Bought with 94k and currently 115k going and going and going..........

[motoman]

2001 Honda ST1100...Bought with 94k and currently 115k going and going and going..........
Dat's what they do best!