Are the FJ 1100/1200 transmissions interchangeable between all models/years?
Thanks
The gear ratios are the same. The later model bikes got strengthened shift forks, and maybe slightly wider gears with slight undercutting of the engagement dogs.
So, I can take a complete transmission from a late 1200 and drop in my 1100?
I'm pretty certain that you can, but I've not done it.
Ask Randy, I'm sure he'd know for sure.
Arnie
Sorry, I missed this thread.
As long as the transmission is from an FJ then you are good to go, they are all identical.
Now, if you are attempting to change out a transmission from a xjr1200/1300 then the output shaft is 8mm longer and they will not interchange.
Randy - RPM
Thanks a lot.
I can get a '93 low mileage FJ1200 complete transmission for little money, so that will go into the FJ1100 this winter :good2:
Yes, the 93 trans will work. My only recommendation is upgrading to the current shift forks and installing the detent shift kit to ensure you don't have future problems.
http://rpmracingca.com/proddetail.asp?prod=Engine%3AS%2FFcenter (http://rpmracingca.com/proddetail.asp?prod=Engine%3AS%2FFcenter)
http://rpmracingca.com/proddetail.asp?prod=Engine%3AS%2FFleft (http://rpmracingca.com/proddetail.asp?prod=Engine%3AS%2FFleft)
http://rpmracingca.com/proddetail.asp?prod=ENgine%3AS%2FFright (http://rpmracingca.com/proddetail.asp?prod=ENgine%3AS%2FFright)
http://rpmracingca.com/proddetail.asp?prod=engine%3AShiftKit (http://rpmracingca.com/proddetail.asp?prod=engine%3AShiftKit)
Randy - RPM
Being one of the last years, wouldn't a '93 have the current shift forks? Did Yamaha make further improvements after '93?
Yes, the shift kit will be ordered :good2:
Yes, the 93 was the last year of the FJ but the XJR1300 is still a current production engine/motorcycle. The shift forks I sell, is what is currently supplied by Yamaha for the XJR1300.
Randy - RPM
There were 4 generations of FJ's in the USA:
1st - '84/85
2nd - '86/87
3rd - '89/90
4th - '91-93
My understanding was that Yamaha beefed up the shift forks starting with the Gen 4 bikes (or was it the Gen 3's?)
So Randy, the question is: Are the current XJR shift forks improved beyond the late model Gen 4 shift forks?
Quote from: Pat Conlon on October 05, 2015, 03:55:21 PM
So Randy, the question is: Are the current XJR shift forks improved beyond the late model Gen 4 shift forks?
Yes, all FJ forks were shorter than currently supplied.
But when he gets it all apart he can look at the photos of each fork and compare, or he can send me a photos and I can tell him if they are the same as the current supplied forks.
Randy - RPM
Have the donor trans inspected by a professional... I got burned buying one for my 86.
If you are rider who hits the rev limiter, I would urge you to get your gears undercut and use the new beefy shift forks from an xjr along with a shift kit.
If a less spirited rider , a stock trans with beefy shift forks and shift kit will be plenty strong.
Quote from: Mark Olson on October 06, 2015, 11:01:03 PM
Have the donor trans inspected by a professional... I got burned buying one for my 86.
If you are rider who hits the rev limiter, I would urge you to get your gears undercut and use the new beefy shift forks from an xjr along with a shift kit.
If a less spirited rider , a stock trans with beefy shift forks and shift kit will be plenty strong.
Thanks. I am probably a less spirited rider, rarely going above 6000 rpm :biggrin: so I am sure a standard transmission from a late FJ will be sufficient :yes:
Maybe I missed something, but unless there is a problem with your existing trans, why change? There is no benefit from a later trans, unless you go to an undercut gear set. If you're not a "spirited rider", then there may not even be a benefit from an undercut trans!
I can sure see the reason for upgraded forks, having bent a few myself. But change just for change's sake is just busy work IMHO.
Quote from: simi_ed on October 07, 2015, 12:03:10 PM
Maybe I missed something, but unless there is a problem with your existing trans, why change? There is no benefit from a later trans, unless you go to an undercut gear set. If you're not a "spirited rider", then there may not even be a benefit from an undercut trans!
I can sure see the reason for upgraded forks, having bent a few myself. But change just for change's sake is just busy work IMHO.
Well, I am not changing it for the fun of it :nea:
I have the infamous second gear problem, so it would be a cheap fix and I have never heard about any one having problems with the pre ´91 transmissions.
Ok, I now get it. I developed the 2nd gear problem on my '89, perhaps during some 'spirited riding'. I will add that the trans job is a LOT of work to go through, so I recommend doing it right initially by getting the undercut trans. You may be OK ... Maybe not though! Imagine having to do that job again because you tried to save a few bucks.
Again, IMHO. YMMV.
Ed
Quote from: simi_ed on October 07, 2015, 01:10:50 PM
Ok, I now get it. I developed the 2nd gear problem on my '89, perhaps during some 'spirited riding'. I will add that the trans job is a LOT of work to go through, so I recommend doing it right initially by getting the undercut trans. You may be OK ... Maybe not though! Imagine having to do that job again because you tried to save a few bucks.
Again, IMHO. YMMV.
Ed
Appreciate the input. Thanks :good2:
Quote from: 4everFJ on October 07, 2015, 03:21:02 AM
Quote from: Mark Olson on October 06, 2015, 11:01:03 PM
Have the donor trans inspected by a professional... I got burned buying one for my 86.
If you are rider who hits the rev limiter, I would urge you to get your gears undercut and use the new beefy shift forks from an xjr along with a shift kit.
If a less spirited rider , a stock trans with beefy shift forks and shift kit will be plenty strong.
Thanks. I am probably a less spirited rider, rarely going above 6000 rpm :biggrin: so I am sure a standard transmission from a late FJ will be sufficient :yes:
getting into the trans is a big deal with splitting the cases and all the little things that go with it . If you stay below the fun zone (6k rpm) then you will most likely be ok with stock parts from a latter model fj. The forks were strengthened for 89-and newer ... getting the shift detent kit will keep the missed shifts out of the picture and keep you from bending forks which causes the problem in the first place.
I took the other path and replaced the trans with a full undercut set of gears , beefy forks and the detent kit. My reasoning was I only wanted to do it once and not worry. It was worth it for me, for the piece of mind.
Check out the Rpm webpage and see what you wanna do . You know the saying " as long as you have it apart , might as well ......"
I know the 'replace all parts' fever you get when opening an engine :biggrin:, but since my FJ1100 doesn't use any oil at all, I will only do the transmission swap and not even look at other parts.... ( I won't).
I can get a complete transmission from a ´93 FJ1200 that has done 6000 miles for USD 120,00. Putting in an undercut trans from RPM would be nice, but I simply can't justify the price difference, knowing that late FJ's have a history of trouble free transmissions.
I will put in the shift kit though, to get more positive gear shifts.
Sounds good :good: