xs1100 junkie

[BA80]

like the 4/11 compared to the 5/12 ratio... at the diff... are they doing something in the gear case? what could one dig in to in a case of re-engineering the complete drive for the 5 speed verse the 6 speed out drive to ground effects... less bottom but much more top at cruiser speeds... just a thought...

No room. This 5 speed transmission is already almost as beefy as one in your Civic.

[RichW1064]

I get it...

No, I said it's LIKE having a 6th gear. Your bike will STILL have 5 gears but the taller rear gear lowers the engine RPMs about 8 - 9 hundred RPMs in 5th gear. Instead of 5K on the tach at 60 MPH it's 5K at 70MPH. It's virtually unnoticeable in the lower gears.

It doesn't install another gear in the transmission.

like the 4/11 compared to the 5/12 ratio... at the diff... are they doing something in the gear case? what could one dig in to in a case of re-engineering the complete drive for the 5 speed verse the 6 speed out drive to ground effects... less bottom but much more top at cruiser speeds... just a thought...

[BA80]

4-500 at the same highway speed.

T.C.

Closer to 8 - 900 rpm TC. Almost a thousand.

[BA80]

I am so junkified with taming Molly RPM's at express speeds that I went to the sister .org site looking for an FD series 850, when you get around to picking yourself up off the floor, you can laugh again... lol... so the 850 all have 6 speeds... and all the same rear diff's... is there something going on in the rear drive unit? now I am really curious... gotta have one just to know... Man... I am so glad that I have friends like you guy's around... lmao...

No, I said it's LIKE having a 6th gear. Your bike will STILL have 5 gears but the taller rear gear lowers the engine RPMs about 8 - 9 hundred RPMs in 5th gear. Instead of 5K on the tach at 60 MPH it's 5K at 70MPH. It's virtually unnoticeable in the lower gears.

It doesn't install another gear in the transmission.

[TopCatGr58]

Rich,

The 850's only have 5 gears also. The Final Drive ratio is taller on the 850s, so the driveshaft turns fewer rpms for the rear wheel to turn. The 1100's is slightly shorter, so it takes a little more rpms to make the rear wheel travel the same distance.

SO...putting the 850 Final Drive unit on the 1100 allows the crank to turn less rpms while still spinning the rear wheel fast enough to maintain the same road speed. The 850FDs are built better/stronger than the early 750s', and that's why they are preferred to perform the swap on our bikes.

People just say that putting the 850 FD on the 11 is LIKE getting a 6th gear because it lowers the rpms by ~4-500 at the same highway speed.

T.C.

[TopCatGr58]

about the RPM's on the express... Molly is only a five speed and as you know 70mph is around 5grand... been staying off the express with her, she wants it though... lol...

I will need to look into this Greg... lets see, gear lube with labor plus diff... could prove to be well worth the cost...

Hey Rich,

Don't be afraid of the Express.....these bikes will run 5-6K rpms ALL DAY LONG and ask for more.....they are engineered to like that. They aren't Hardley's, and won't shake you to death or themselves at that speed/rpm. Lots of folks have done the Final Drive swap and enjoy it. I don't do as much extreme highway speed so I don't care to swap, I like running and revving it up in the upper power bands! YMMV.

T.C.

[RichW1064]

silly me

I am so junkified with taming Molly RPM's at express speeds that I went to the sister .org site looking for an FD series 850, when you get around to picking yourself up off the floor, you can laugh again... lol... so the 850 all have 6 speeds... and all the same rear diff's... is there something going on in the rear drive unit? now I am really curious... gotta have one just to know... Man... I am so glad that I have friends like you guy's around... lmao...

[BA80]

the gear case? its all in the final drive assembly? if I had one of them both yep, I would be counting the rev's... so I need to go there to get the head around it I see... lol...

At the rear wheel Rich. The FINAL DRIVE......the differential......the REAR END.

The part that takes the place of the rear sprocket on a chain driven bike.

Click on the link I provided in post #25.

[RichW1064]

its nothing in

the gear case? its all in the final drive assembly? if I had one of them both yep, I would be counting the rev's... so I need to go there to get the head around it I see... lol...

[RichW1064]

I'm a lookin...

but I guess I need a touch more understandin of just what an FD is..? goodgreif...

[BA80]

Just installed one on ambisinister's G last weekend. Took about an hour. Those 850 FDs are only $20 - $30 on ebay.

[RichW1064]

I was concerned

Yeah, the 750/850 FD is a little taller gear. Like having a 6th gear and lowers highway RPMs. I prefer the 850 because all 850 FDs are type 2 and much easier to work with.

http://hitechkc.dyndns.org:78/phpbb3...4a831b3ed3c39d

about the RPM's on the express... Molly is only a five speed and as you know 70mph is around 5grand... been staying off the express with her, she wants it though... lol...

I will need to look into this Greg... lets see, gear lube with labor plus diff... could prove to be well worth the cost...

[BA80]

Yeah, the 750/850 FD is a little taller gear. Like having a 6th gear and lowers highway RPMs. I prefer the 850 because all 850 FDs are type 2 and much easier to work with.

http://hitechkc.dyndns.org:78/phpbb3/viewtopic.php?f=5&t=108&sid=1411b3b30ee8abae3c4a831b3ed3c39d

[RichW1064]

the final drive

Crazy thing is, the parking lot was full of Hardleys .

on your bike is from an 850? is there a ratio difference compared to the 1100 final drive Greg?

[BA80]

Crazy thing is, the parking lot was full of Hardleys .