What is this hole?

[Storm Trooper]

Guys, I have been overhauling the bike and found this small hole at the front of the clutch side housing at the front of the water pump impeller. I have a spare old engine casing which seems to have a right angled nipple on it so was wandering what it is for and what should be correct. The hole, or the nipple and what should be attached?

Currently my bike?



Spare cover with nipple?



Help?

Cheers

[AMCQ46]

It's a drain for the chamber behind the water pump seal. Newer engines have the nipple, old ones just the hole.

[agentpineapple]

see you don't get these answers on the facebook sites, you should have asked here first trooper....

[Storm Trooper]

Never quite as easy posting on here with an Android phone till I get home and get on the Laptop.

[Storm Trooper]

Is it worth tapping a nipple into the hole to divert it downwards? More preventative to stop cr*p getting in directly?

[lloydie]

No just leave it be .

[Storm Trooper]

worth a squirt of spray grease or WD-40 in there?

[E.Marquez]

see you don't get these answers on the facebook sites, you should have asked here first trooper....

Sure he did ,, and yes Im sure, as Im the one that answered...LOL

[Wicky]

worth a squirt of spray grease or WD-40 in there?

It's an external pathway outlet to allow coolant to run out from behind the clutch if there's a gasket failure, rather than allowing fluid busting through into the engine oil.

As mentioned before just leave be (don't shove anything up like you don;t for no good reason poke stuff up your 'jap's eye', carefully follow manual instructions as to where to apply gasket sealant if you ever take off and put back on the clutch cover / water pump to ensure nothing can block this important design feature.

[Storm Trooper]

worth a squirt of spray grease or WD-40 in there?

It's an external pathway outlet to allow coolant to run out from behind the clutch if there's a gasket failure, rather than allowing fluid busting through into the engine oil.

As mentioned before just leave be (don't shove anything up like you don;t for no good reason poke stuff up your 'jap's eye', carefully follow manual instructions as to where to apply gasket sealant if you ever take off and put back on the clutch cover / water pump to ensure nothing can block this important design feature.