Forum

[David]

Hi everyone

I am trying to trace a course of a problem with my 1998 500cc Royal Enfield Bullet. I have recently fitted Hitchcocks breather kit to my bike, which was the last change I made before this problem appeared to manifest itself, and logically this could be the course of the problem.

I have a quick quest for other riders that have fitted the Hitchcocks Breather kit to there bikes.

When the bike is started at idle, does the duckbill open and close and potentially make a sound? ( let the pressure out of the crankcase )

This is all for now.

Dave

[Wheaters]

I wouldn't worry about this unless the bike is low on compression (then it probably wouldn't idle well), or is burning oil.

There is almost bound to be some piston ring blow-by and this will cause "pulsing" in the breather at idle.

But then, what do I know - I'm only a "quack"...

[David]

Wheaters, I wouldn't of posted unless there was a more serious reason for me to post! haha...I'm not going to post for the heck of it.


I'm using the original question as a form of diagnostics, because if the duckbill isn't letting the pressure out of the crank cases (engine), it could course other problems. Like the one I have, which could also have two other courses.

So I say again, can somebody that has a Hitchcocks breather kit fitted to a RE 500 upto 2003, please confirm whether or not the duckbill, should pulsate and or quack? Because at the moment mine isn't.

[Barry_Q]

I've got the breather kit fitted to my Lightning. All I know is: My chain gets oiled!

[PeteF]

My experiance is that you won't get a sound and they don't pass that much air on tickover. It should probably be detectable though. Try holding it under water.

[Wheaters]

David, read your first post again. You didn't actually state whether your duckbill was "quacking" or not! I wrongly assumed that it was and that you were concerned about that.

[Adrian]

There was a recommendation, possibly as far back as Redditch days, to trim the end of the duckbill. How effective it was I couldn't tell you! Frankly I wouldn't use one, I'd just have a mechanical non-return valve (with not too strong a spring in it) in the pipe between the breather exit under the l/h side of the cylinder and the input stub to the breather tower, and plain tubing from the breather tower to wherever you want it to vent. With a duckbill fitted downstream of the breather tower some of the breather gases will escape from the oil tank filler cap vent hole and possibly around the cap itself.



A.

[Colin F]

My experience with duckbills is they only quack when warmed up,and they seem to work
perfectly on the Bullet.