thanks spiderman.....
FXR2....
I'll be interested in seeing how this plays out, but me, I like the idea of loafing along at cruising speeds more than increased acceleration. I got the acceleration and torque increase from the motor mods. To each their own. If anything I've actually pondered increasing the ratio of 4th and 5th gears or maybe going to a six-speed set in my stock trans case for lower RPM's at highway speeds. But when it comes right down to it, before I'd do all that to my FXR2, I'd probably buy a second bike (bagger) with tall gearing for the road.
Well since I originally posted this thread I have discovered more information.....just waiting to collect more as well...but did you guys know that all of the 1993 FXR's ie: FXR Super Glide, FXRS-Sport, FXLR Low Rider Custom, FXLR Low Rider Custom 90th Anniversary Editon, & FXRS-CONV actually had 3.37 gearing as stock.....In 1994 HD changed the gearing of the inner primary to where it became 3.15. Now our FXR2's and FXR3's have 2.925 gearing....that's pretty tall already FXR2.
At 55 mph in 5th gear we couldn't be running more than 2290 rpms since at 3.15 gearing one would be running 2330 so hopefully you are running in 4th gear with your bike at this speed.
At 70 mph in 5th gear we couldn't be running more than 2925 rpms since at 3.15 gearin one would be running at 2970 rpms which in my opinion would never signify a need for an over drive yet.....at this speed.
At 75 mph in 5th gear we couldn't be running more than 3125 rpms since at 3.15 gearing one would be running 3180 rpms....still this is barely getting into the sweet spot of the engine....where it should be running very happy....I just don't see the need for a higher 5th gear or the need for a 6th gear at all.
At 80 mph in 5th gear we couldn't be running more than 3325 rpms since at 3.15 gearing one would be running at 3400 rpms.....still in the sweet spot....but yes it's getting a bit higher....but spending any time at 80 miles an hour is illegal anyway and now you are looking over your shoulder which takes the fun out of everything....so while I see 80 mph it's only in brief spurts or when passing....but I just don't cruise at this speed....besides the type of riding I enjoy doing would be more on the "county" highways where one's max speed might be what 60 miles an hour....when going cross country I spend very little time (as little as possible) on our interstate highways....
at 85 mph in 5th gear we couldn't be running more than 3550 rpms since at 3.15 gearing one would be running at 3600 rpms same explaination as for the 80 mph speed....just not an issue....
FXR2 lol, I do have a bagger....and I am getting ready to pull the gears down....to 3.37 from the taller gearing of 3.15....I feel the fun is in the mountains, light to light, and anywhere from 0 - 40 or 50 as quick as you can get there legally type of fun.....so I am looking for more torque even in my bagger....lol
Coming back to the FXR2 however I haven't convinced myself of the need to do this.....I am merely creating some dialogue on the topic....what others are thinking ie: like yourself....all opinions are valid and greatful of course.....
I just found it interesting that HD in 1993 for the FXR models:
FXR Super Glide (silver engine)
FXRS-SP Sport somewhat like the FXDX of today....
FXLR Low Rider Custom
FXRS-Conv
that they were running 3.37 gearing...and the FXRS-CONV was considered a "touring bike"......
Interesting stuff when you start to research......I actually didn't know this information when I began doing this......but find it quite interesting....I haven't gone back to 1992, 1991, 1990 or further back to see what gearing was being ran in those FXR's....
While I don't have the part numbers to confirm or deny yet the 1994 FXRs (which were only two models the FXR Super Glide and the FXLR Low Rider Custom) they ahad a final gearing of 3.15 just as my 2002 Road King Classic...I wouldn't be surprised if all of the part numbers for the primary were matching.
I will say this also that the 1999 FXR2 and FXR3 models run the exact same parts ie: outer primary, compensating sprocket, clutch shell basket with ring gear, primary chain, transmission sprocket as my 2002 Road King Classic...the only difference is that the FXR2's and FXR3's runs a 65 tooth rear wheel sprocket vs a 70 tooth rear wheel sprocket on the 2002 Road King Classic making the difference between 2.925 for the FXR2 and FXR3 (I am not entirely sure what the FXR4's are running) and 3.15 gearing for the 2002 Road King Classic ( I am singling out the RKC as I own this bike so other touring models would also fit the description as well....)
I would also make this comment, gearing is a fascinating way to modify your engine, sport bike riders, dirt bike riders are always messing with gearing and counting teeth....it's just not that widely practiced in the HD world.....and I feel it can only compliment what you have already gained with other engine mods....whether that might be, cams, pistons, heads, etc....
Now I have to go figure out what Spiderman is trying to tell me....lol
All comments welcome....that's why I through out the topic.......
Regards,
FXR2evo99
Author
Topic: Would Changing Gearing Create Any "Fun" Torque Benefits For Our FXR's (Read 11185 times)