News:

         
Welcome to FJowners.com


It is the members who make this best place for FJ related content on the internet.

Main Menu

GSXR back rim.

Started by Paul.1478, November 05, 2018, 11:11:59 AM

Previous topic - Next topic

TexasDave

The stock gearing on my 84 was 17 and 41. I changed to 18 and 40. It made slightly more than a 500 rpm difference at highway speed. Most of the guys that do a lot of highway riding go to a 18 and 39. Pat was running 18 and 40 on his 84 with the 17 inch rear tire mod. Riding beside him our speed and rpms where the same as the 17 inch tire has about the same profile as the 16 inch stock. 17 just gives you a wider selection of rubber with a wider tire.

Dave
A pistol is like a parachute, if you need one and don't have one you will never need one again.

Paul.1478

I do not want the 42 that's the issue.
89 gsxr 750 (the rim I will have )  smallert soroket is 42. I have to have one made.
Agree 62 is high compared to off the shelf but not bad for "custom" made.
2006 GL1800
2009 KLR650
1976 RD400
1993 FJ 1200 ABS

Millietant

That's cool Paul, I understand re the cost  :smile:

I was just thinking that as standard is 40 teeth on the rear, anything more than that on your GSXR wheel will mean that your bike is revving higher than standard (and if you went for the 18 tooth front, the 41 rear will be negating some of the benefit of the front change)   :good2:
Dean

'89 FJ 1200 3CV - owned from new.
'89 FJ 1200 3CV - no engine, tank, seat....parts bike for the future.
'88 FJ 1200 3CV - complete runner 2024 resto project
'88 FJ 1200 3CV - became a race bike, no longer with us.
'86 FJ 1200 1TX - sold to my boss to finance the '89 3CV I still own.

ZOA NOM

I found a 40T GSXR sprocket on eBay.

Rick

Current:
2010 Honda VFR1200 DCT (Full Auto!)
1993 FJ/GSXR 1200 (-ABS)
1987 Porsche 911 Carrera (Race)
1988 Porsche Carrera (Street)
Previous:
1993 FJ1200 (FIREBALL)
1993 FJ1200ABS (RIP my collar bone)
1986 FZ750
1984 FJ600
1982 Seca

RPM - Robert

The 750 wheel has a 5 bolt sprocket not the 6 bolt like yours Rick. The 6 bolt sprocket will not fit.


ZOA NOM

Quote from: RPM - Robert on November 15, 2018, 10:39:55 AM
The 750 wheel has a 5 bolt sprocket not the 6 bolt like yours Rick. The 6 bolt sprocket will not fit.



Well, that's just stupid. Will the cush drive with six bolts fit the 750 hub?
Rick

Current:
2010 Honda VFR1200 DCT (Full Auto!)
1993 FJ/GSXR 1200 (-ABS)
1987 Porsche 911 Carrera (Race)
1988 Porsche Carrera (Street)
Previous:
1993 FJ1200 (FIREBALL)
1993 FJ1200ABS (RIP my collar bone)
1986 FZ750
1984 FJ600
1982 Seca

RPM - Robert

That I do not know. I actually thought they were all the same yesterday until Paul contacted me and said our sprocket would not work. Upon further investigation, our supplier only stocks 42T-48T sprockets for the 1989 GSXR750.

Guess he could ride wheelies everywhere if he wanted a cheaper sprocket.


Bones

I've got an 88 gsxr 1100 4.5in wheel that's got the six stud sprocket fitted. Strange how they went smaller for the 750 as it wouldn't exactly be lacking in power itself. Not sure if the Sprocket drive is interchangeable, I'm assuming it is and might be something to look out for as smaller sprockets are easily available for the six stud. I found a 38t sprocket for mine on EBay no problem at all.
93 fj1200
79 suzuki gt250x7


Too young to be old but old enough to know better.

Pat Conlon

An 18t/42t is not a bad combo. That would at least get Paul on the road until a custom sprocket can be made.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Millietant

True Pat, I agree.

18:42 is as near as makes no difference to the stock 17:40 sprockets.
Dean

'89 FJ 1200 3CV - owned from new.
'89 FJ 1200 3CV - no engine, tank, seat....parts bike for the future.
'88 FJ 1200 3CV - complete runner 2024 resto project
'88 FJ 1200 3CV - became a race bike, no longer with us.
'86 FJ 1200 1TX - sold to my boss to finance the '89 3CV I still own.

Paul.1478

It only 4 days from order to delivery.
I'm not going to do it for a few months. I just got new tires installed.
Need to burn off the back ASAP.

Thank again guys. Great helpful group.
2006 GL1800
2009 KLR650
1976 RD400
1993 FJ 1200 ABS

T Legg

 My 84 fj1100 came with 17/42 sprockets and i still have those sizes on.I do admit I try to shift to sixth often on open roads but I've yet to top it out in fifth and i love the gearing when driving sporty through the mountains or when passing.I've never ridden another fj so I don't know what I,m missing. 
T Legg

Pat Conlon

Hey Travis, yea, same here, I remember the 17/42 combo on my bike. That was a looong time ago.
The easiest way I have found to experiment on my '84, is to try a 18t counter shaft sprocket. See if you like it (you will) Your chain will like it for sure.

Changing the front sprocket is a snap, much easier (and cheaper) than the back sprocket.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Firehawk068

Just before my big trip with Cap'n Ron this past summer, I installed brand new chain and sprockets. I went with 18/38
After riding that whole trip with those (6,000+miles) I am switching back to 18/40..............I may even try to find a 41, if anybody makes one?

The 18/38 combo is too tall for my liking. The FJ has no trouble pulling away from stops with these, and has plenty of torque to accelerate with them even in the higher gears.
Although I liked how this combo put the revs down in a lower range, I felt that it caused the engine to be "working" slightly harder during the kind of riding I like to do.
I noticed my fuel mileage to be slightly worse than with the 18/40 combo, due to me having to use a bit more throttle to maintain speeds, either on the Interstate, or into the wind.................especially loaded with gear.  I feel that it puts the revs below the "sweet-spot"

Anyway, that's just my findings. YMMV  :drinks:

ps:  I'll probably have a slightly-used (only just over 6,000 miles) 38-tooth rear sprocket for sale shortly.............
Alan H.
Denver, CO
'90 FJ1200

ribbert

Quote from: Firehawk068 on November 15, 2018, 07:28:02 PM

I am switching back to 18/40..............I may even try to find a 41, if anybody makes one?


I switched to 18/41 about 80,000km ago. It was one of those changes that I never gave another moments thought to, it was just right. As many here know, my riding covers a bit of everything from crawling along bush tracks in first gear to big, fast days and everything in between.

I can't imagine going a whisker either way being an improvement as an allrounder best option.

There is however no right or wrong with gearing, within reason it is entirely personal choice.

Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"