new owner fj1200 how fast are these bikes?

[motoman44]

Ok so I introduced myself ,
And have been working on my 93 fj1200

Stock

So hear is my question. Bike idles great runs down the road .
I just thought it would be faster. 


Are these bikes fast. I has a xj1100 when you got on it  would suck you back.
I am just wondering if these bikes are fat stock or maybe I have carb issues.

I know it had aftermarket exhaust and the carb was  rejected. Then a guy bought it and dint want aftermarket exhaust so it was removed and they left jets in. That was in Arizona . I guess he drove it back here to WA state, then had the carbs tuned for lower elevation, but jets were still never Changed.


He sold it to the guy I just purchased it from who used it has a commuter, said it always ran great.

So I have it and it   purrrrrs  but  when I get on it just seams like it should pull harder I did notice a kinda flat spot mid acceleration  and its smooth but I wouldn't call it fast.


So do these bike pull stock?
I drove a gpz 1100 it was scary fast.

[Pat Conlon]

In expert hands, properly tuned, these heavy bikes will turn a high 10 second quarter mile.
Even by today's standards, the FJ has a very respectable 60-80mph roll on time.

If you suspect your engine is soft, do the basics, check your valves, replace shims as needed, then check your compression, then sync your carbs and adjust the idle..

Get your bike to a dyno and see what kind of numbers your engine is turning.
This will also allow you to see what your fuel/air ratio is.

FJ's seem to run forever, even when the engine does not reach it's full power potential.

A proper running stock FJ will pull the wings off a stock GPZ. It happened in '84 and will do so today.

[motoman44]

No its upper clean with only 25,000 I doubt it has engine problems.

[Pat Conlon]

No its upper clean with only 25,000 I doubt it has engine problems.

Have you or the previous owners, checked the valve clearances?

[Maticuno]

do the basics, check your valves, replace shims as needed, ... , then sync your carbs and adjust the idle..

All of these are things that can work themselves out of adjustment over time, even with a bike as low mileage as yours.  Also, if the bike was rejetted for a certain set up, and that set up no longer exists, it's possible that you are now running too rich which would certainly decrease performance.  Does the exhaust pop at all when engine braking?  Do you have aftermarket pod air filters?

[motoman44]

Ok
So today I took it for a good ride.
Got on the freeway, and sure enough I had to ease the throttle.
I rode it through some twisties then got on it and it sputtered and took off.
It seam lieu could gas it more.

So I got on it again and it sputtered again and took off . The acceleration got better and better.
I used up the gas and Putney gas in and got on the freeway home.

Wow now that's what I am talking about 65-75 just like that.
Running great .
Must of had some crap from sitting in the carbs, and new gas helped.

[spsmith_fj1200]

I saved the Performance Index page from the March, 1993 issue of Motorcyclist.  This is what was obtained from their testing

1992 FJ1200A     tested 7/72  quarter mile 11.17 seconds, 120.4 MPH   top speed 140
1991 FJ1200       tested 6/91  quarter mile 11.05 seconds, 122.9 MPH   top speed 146

[Maticuno]

Draining old fuel out of the carbs, then flushing with fresh, high quality fuel is the laziest (but often the most successful) way to fix rough running issues.

[movenon]

Don't forget to change your fuel filter under the tank. It seems to be a neglected item sometimes
George