FJ1200 running problems

[Mr.Freeze16]

Hello, I'm new to all this so bare with me. I bought a 1990 FJ1200, it sat for 2yrs before I bought it and would start and run with choke so I thought I'd just have to clean carbs up. Well I cleaned carbs all out but it ran a little better and would idle without choke but when you wanted to go and you gave it gas it seemed like it had maybe 50hp not 145 like it should. I did a finger compression check and it seemed like it had good compression. I put the carb sync gauges on it and all sat at the same spot in the red where it says ignition timing off, heat riser, and intake manifold bad. I really need some help because this is a beautiful bike and I'm dying to ride it. Can anyone please help.

[jscgdunn]

Hi and welcome,
A few questions:
Please describe how you cleaned the carbs.  Have you ever cleaned motorcycle CV carbs before? 
Have you confirmed spark at all cylinders?

There will be a lot of help for you here.  Just hang in there...

Jeff

[simi_ed]

Welcome Freeze, you are the proud owner of a set of clogged pilot jets!  I'd recommend to order a set (or even 2 sets) of #40 pilots   <http://www.rpmracingca.com/proddetail.asp?prod=Carb%3APilotjet&cat=24> and  set of Stainless Steel screws <http://www.rpmracingca.com/proddetail.asp?prod=carbkit&cat=24> from Randy.  Follow the "simple' rebuild instructions here <http://www.fjowners.com/index.php?topic=655.0> & you'll be styln'

Feel free to drop by the Introductions page & tell us a bit about yourself & your New FJ

[Mr.Freeze16]

I will try that I was hoping it was something like that instead of a valve problem or something like that. I appreciate the help.

[Pat Conlon]

....I put the carb sync gauges on it and all sat at the same spot in the red where it says ignition timing off, heat riser, and intake manifold bad......

I have no clue what this ^^^ means. Anyone?

[oldktmdude]

....I put the carb sync gauges on it and all sat at the same spot in the red where it says ignition timing off, heat riser, and intake manifold bad......

I have no clue what this ^^^ means. Anyone?

Pat, I have seen car specific vacuum gauges with that type of diagnostic terminology on the dials. I have never seen this on any carb sync gauges that I can recall. Would disregard any such information and just make sure the vacuum numbers are similar. My guess is that the idle circuits have not been cleaned properly ; float bowl housing jets.  Pete.

[Mr.Freeze16]

I cleaned the carbs with carb & choke cleaner and shot it into all holes I could find, lol. Then I gave it new gas and it started running a little better. It'll climb in speed slow, pops thru exhaust when I full throttle a little.

[Pat Conlon]

Got it...thanks Pete

[Mr.Freeze16]

Hi and welcome,
A few questions:
Please describe how you cleaned the carbs.  Have you ever cleaned motorcycle CV carbs before? 
Have you confirmed spark at all cylinders?

There will be a lot of help for you here.  Just hang in there...

Jeff


I cleaned with carb & choke cleaner and yea getting spark. #2 sparkplug is turning
black all others fine

[ribbert]

I put the carb sync gauges on it and all sat at the same spot in the red where it says ignition timing off, heat riser, and intake manifold bad.

Mr Freeze, what you are using is an automotive diagnostic vacuum gauge, like this:



Those markings have no relevance to what you are trying to achieve.

With a carb sync, you are not chasing a number but comparing (and matching) one to the other. You want all 4 reading the same, that's it.
For the purpose of carb synching, the faces of the gauges may as well be blank.

Noel

[Mr.Freeze16]

Hi and welcome,
A few questions:
Please describe how you cleaned the carbs.  Have you ever cleaned motorcycle CV carbs before? 
Have you confirmed spark at all cylinders?

There will be a lot of help for you here.  Just hang in there...

Jeff

Sorry if I already did a reply I'm using a phone to do this and it didn't show the one before. Anyway. I've rebuilt carbs before these had something that's greenish and dry looks like oxydisation on it. there's spark.

[FJ_Hooligan]

If you didn't take EVERYTHING off/out of the carbs (jets, mixture screws, choke plungers) then they are not clean.  You symptom is indicative of clogged idle jets/circuit.

[simi_ed]

Spoken like the man that knows FJ carbs.    Listen to what he says.  BTDT, finally read the book.

[Pat Conlon]

Spoken like the man that knows FJ carbs.    Listen to what he says.  BTDT, finally read the book.

I was thinking the same thing Ed....this Hooligan guy sounds soooo familiar....so strange....

[movenon]

Spoken like the man that knows FJ carbs.    Listen to what he says.  BTDT, finally read the book.

I was thinking the same thing Ed....this Hooligan guy sounds soooo familiar....so strange....

+1