2 holes what r they for

[polly]

i have an fzr400r 3en2
and on the engine block are 2 holes ether side of the engine situated inbetween the fins, and when bike gets warm coolant comes out if them. i can not see any threads in them and do not know what they are for. my engine has been rebuilt so i am a bit concerned as to why this is happening.
any help gratefully recived

[Pete.]

The holes are probably to drain water out of the plug cavities for when the bike either gets washed, rained on, or develops a leak/blows it's head-gasket. I would look for a leak in the radiator hoses around the top of the engine. Not ever having worked on a FZR engine I couldn't be more specific sorry.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Whosthedaddy]

[stinkwheel]

I can tell you the exact problem.

Whoever rebuilt your engine re-used two rubber o-rings on the coolant pipes that pass down through the rocker cover. If you don't use a brand new o-ring every time you remove these, they are pretty much garaunteed to leak.

The bike is leaking coolant past these o-rings and into the sparkplug recess, it is then draining out of those two holes which are there for that express purpose. The holes do not lead into any internal parts of the engine, they are for draining fluid off the top of the cylinder head.

What needs to be done is to remove the tank, drain the coolant, undo the two screws that hold those coolant pipes in place and pull them out of the rocker cover. Throw the old o-rings away and fit new ones (they are an odd size, you'll need to get proper kawasaki ones). Refit the pipes and refill the coolant system.

The o-rings cost about 50p each. If you paid someone to rebuild the engine, I would make them sort it out because pound to a penny they re-used the old o-rings in the first place. I bet they've clarted them in silicone too, it doesn't work.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Finglonga]

[Whosthedaddy]

[polly]

YES whosthedaddy
thats the holes i mean, and that appears to be where the water is comming from, so should they have anything in them or do they act like an overflow, as like you said it only leaks when you lean the bike or put it on side stand.
do i need to worry or can i ignore it.
thanks god someone knows what i mean as i did not know how to add a pic thanks.

[Finglonga]

Stinkwheel has summed up the problem and cure.
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Andy Sez....
F.Y.Y.F.F.

[polly]

thanks for all your help i will look into the problem when i get a chance and let you know the out come

[willi]

they are drain holes from the spark plug cavities.so condensation can escape. my fzr1000 has them also
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wat goes around comes around.

[fuzz]

[stinkwheel]

[polly]

thanks guys will srip off tank and air box and check for leaks on my hoses as that must be where its comming from.

[polly]

found the problem water was coming from my water hoses and resting in plugs water then drains out these holes.all i have to do now is get the dam air box back on as its a nightmare even soaking it in boiling water dont help LOL

[Whosthedaddy]

I found this a little tiresome and damn fiddly.

Tilt the airbox at a slight angle so that the rubbers meet the carbs and making sure that they are lined up correctly give them a Hulk style forearm It may be easier to start from one side then continue to 'tap' the remaining rubbers home as you go. Once you get one done, the rest soon follow
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Current : MSX 125 Past : CBR 900RR Monkeybike : c50 LAC : ZXR750 H2 : FZR600 : ZX7R P3 : YW100 : TRX850: Trophy 900 T309 : GSXR 600 L0: Monkeybike : XJ6S Whosthedaddy