1990 fj 1200 increasing revs ? And noisy top end ?

[homer1200]

Just purchased an fj12 which has been stood quite awhile and it starts up ok but then the revs increase on their own and i have to turn off as they won't come down { Odd times they do though but then increase again }and also misfires untill fully warm. The bike has had new plugs and i'm told a service. Are these a bit of a noisy engine as it seems to be rather rattly at tickover but fades when revved up. Seems to be top end scource ? Would a carb problem cause these symptoms ?
Thanks

[craigo]

First off, Welcome Homer,

The reving issue sounds like a carb problem, but mostly like there is an air leak somewhere. Other's here who are more knowledgeable about this will no doubt chime in on that.

The FJ motor is a noisy beast. The ticking you hear in the top end is all normal. Most likely coming from the area of the #3 and 4 cylinder top end. The clutch makes a racket also till warm.

Once you get the idle issue fixed, you are going to love your new FJ as all of us do.

CraigO

[homer1200]

Gratefull Will check it out.

[srutherford]

also after you clean and inspect carbs cable ect. Be sure you throttle cable push/pull is adjusted properly mine did the same thing after i reinstalled the carbs. that was the problem. As said before you will love this bike. promise 

cheers
silas

[homer1200]

Thanks for that Silas will strip her down and have look see. Still worried about the noises as its not exactly a ticking noise more of a rattle sound but as i said if i rev her it gos away. Its only at tickover even when warm i find. Only got two owners and done 27000 but been stood 8 years. hmmmm anyway time will tell.
Thanks again 

[srutherford]

Welcome I sent u a pm. Noisy valves are happy. Starter chain makes a racket as well if it were a serious as a rod knock or anything like that I would imagine it would do it in all rpm getting louder as they rise. I learned if the see guys say it believe them. They know. The fj engine is damn near bullet proof they don't make em like this no moe

[Yamifj1200]

Whats your idle set to? 1,100 rpms is about right, less than 1,000 makes for a noisy top end..


Eric M

[homer1200]

Thanks for the replies.
Difficult to set tickover speed due to carb fault { rising revs and misfire etc } but relieved to know the engine should be sound and nothing serious. Probably been spoilt owning a BM RS1000RR too which is deathly quiet at tickover. Will make a lovely bike i feel when sorted and always wanted one since i remember them coming out new. { Also remember the yds7, h1 kwak , honda cb750 and all the rest from the late sixties early seventies }.
Great forum
Thanks again to everyone.  Ian