MOTOBRICK.COM
MOTOBRICK MARKETPLACE => FS WTB WTT ~ Bikes ~ Parts ~ Gear => Topic started by: wmax351 on July 06, 2012, 09:09:40 AM
-
I'm interested in swapping my FD to the higher ratio Paralever model. (The 2.75:1 model, iirc)
I have a '91 K75, with a 32:10 FD. I keep wishing for a 6th gear, or some longer legs from the FD. I spend a lot of time at high speed cruise in California traffic. This translates to bad gas mileage, and some buzzing. It works out to 80 (calibrated) mph at 6000 rpm. I would like to get that closer to 5000.
The entire driveshaft system has been rebuilt. The shaft and final drive splines were rebuilt by Bruno, to aircraft tolerances (reduced wear), with high hardness steed (RwC 65, for further reduced wear). New U joints and FD bearing (shimmed by Bruno), A grease reservoir was added to the shaft. See www.brunos.us (http://www.brunos.us). I also have new swingarm bearings installed.
Also has a Works Performance shock, with a fresh rebuild and gas charge.
If you want the quickest possible K bike, this is your ticket. It will give the fastest acceleration of any BMW K bike configurations.
What I would need is the Final drive, Driveshaft, Paralever swingarm, Paralever rod, and Rear Shock.
I am mostly interested in trade, system for system. I don't really want to have to fidget more than necessary. If I would have to buy first, sell later, I would spend the money tweaking the fuel injection for better high RPM, mid throttle cruise.
-
32:10 is 32:10. Rebuilding the splines doesn't make it any faster than any other K75 with a 32:10.
-
32:10 is 32:10. Rebuilding the splines doesn't make it any faster than any other K75 with a 32:10.
But it does last longer :2thumbup:
-
You could also get a monolever final drive off an RS. I forget the ratio but it is taller (numerically smaller). Probably easier than finding someone who wants to trade and easy to install too.
Tom
-
How do you tell what your final drive ratio is?
-
On a K100 or K75 it is stamped on the flat surface just behind where the swingarm meets the final drive housing and on a paralever it's on the machined surface next to the breather.
-
Got it. Thanx. Now if someone will explain just what all those numbers mean...
-
The big number is the number of teeth on the crown gear and the small number teeth on the pinion gear.
32/11 means devide 32 by 11 and there is the ratio so this would be 2.90 ratio which is usually the ratio for the K100 RT/LT
-
The entire driveshaft system has been rebuilt. The shaft and final drive splines were rebuilt by Bruno, to aircraft tolerances (reduced wear), with high hardness steed (RwC 65, for further reduced wear). New U joints and FD bearing (shimmed by Bruno), A grease reservoir was added to the shaft. See www.brunos.us (http://www.brunos.us).
I'm curious what Bruno's charged for that. Couldn't find any pricing on their site.
-
Mine is 31/11. Is that better for cruising or better for acceleration?
-
32:10 - (3.2) most torque(what most K75s have to make up for the lower horsepower)
32:11 - (2.91) more torque and better acceleration
31:11 - (2.82) less torque, lower RPMs cruising and higher top speed
-
I'll take that! Thanks for he explanation, Duck.
-
The entire driveshaft system has been rebuilt. The shaft and final drive splines were rebuilt by Bruno, to aircraft tolerances (reduced wear), with high hardness steed (RwC 65, for further reduced wear). New U joints and FD bearing (shimmed by Bruno), A grease reservoir was added to the shaft. See www.brunos.us (http://www.brunos.us).
I'm curious what Bruno's charged for that. Couldn't find any pricing on their site.
Depends on the USD / CND exchange rate. Also what is needed. Mine came out to 900 dollars or so, and included a new final drive bearing.