Recently took my 90 flstc to my local Indy for a minor tuneup. Set timing and adjusted idle. Runs good now but was told I have a intake leak. Indy sprayed I think was brake fluid around intake area. Engine stalled then ran right again. Resprayed and same thing. Used this Indy many times and never had any issues. Was told something to care of soon but had seen worse cases. I do occasionally get a pop or semi backfire thru carb. Wondering what other symptoms ?

 

Intake leaks will make a lean condition in your motor.
Not a good thing.
Replace seals as soon as possible.

 

Thanks t.h.c. Will put in shop tomorrow .

 

A lean running engine causes other symptoms like, hotter that normal running temps which can actually affect oil viscosity and low oil pressure. Or if left to run lean too long it could actually burn an exhaust valve and not only an exhaust chirp but next thing you know a valve job. I know extreme but it can happen..... Get your intake seals replaced asap......

 

Thanks hot rod. Glad I posted now. Kinda thought might be a dumb question at first . Nay... Not so dumb!

 

Flip50,
I'm pretty sure the Indy did not spray brake fluid on your intake seals.
He might have used brake cleaner. Brake fluid would make a mess and smoke.
Brake cleaner will evaporate quickly and leave no residue but it will attack paint and even some powder coating.
Water can be sprayed to check the seals if you don't have anything else.

 

Is there any other symptoms for intake leak? Also as the bike is warmed up just spray some water around the intake as she is running. If they are bad you should notice loss of power or bogging correct thanks

 

Thanks megawatt it was brake cleaner spray. The only other symptoms is when I throttle up hard has a little hesitation then smoothes out. And every once in a while will quit running if I don't hit throttle a couple of times. Lean condition less fuel maybe why?

 

I want to check mine out before I go on my ride soon. My bike runs good no back fire no pinging but just want to make sure they are okay. Just want to know the symptoms of a lean motor.

 

Flip50,
If you believe the Indy is correct about the vacuum leak, that is the place to start.
Fix that first. Note that it can leak at the connections to the head, the carb to manifold or at any hose connection on the manifold (like for the VOES).
Once that has been corrected, the bike may perform well.
If there is still a hesitation when you open the throttle, the next suspect would be the accelerator pump.
I do not know what carb you have on the bike so I am guessing you have a CV.
With the bike not running and the air cleaner cover off so that you can look into the throat of the carb, twist your throttle and see if the accelerator pump squirts fuel.
It should do it immediately as you start to turn the throttle. It also should squirt straight down the throat, not to one side.
If it does not squirt straight into the throat of the carb you can grab the little nozzle with a pair of needle nose pliers and turn it.
Now, I ain't a carburetorologist so if that does not fix the hesitation you will need someone else with more experience to help you.
One word of caution. Don't have your face right there looking into the carb with the engine running and rev up the engine. If it "pops" through the carb, you will get an unpleasant surprise.
I only mention it in passing, you probably already know not to do that.