Hello,
I am a happy owner of 99 cbr f4.Recently I have discovered that reserve coolant tank (the plastic one) was burnt. probably because of a collector being to close to it.I refurbished it , but after final examination before putting it back to bike i found the the ovefill outlet pipe (the one on the top near the cap) was stuck and it seemed like that was done deliberately.

As far as I know this tank should be atmospheric one, meaning it s not intended to hold the pressure, plus there should be a way out if it overfills in case of overheating engine and overfilling the tank itself.Plus there was already a hose on the outlet.After thinking for a while I installed a pipe in place of overfill tube (the plastic was badly bent and could not be repaired).

Now I am wondering whether I acted in a proper manner.As for now everything seems fine with engine temp, although temp rises a bit in city jams, but I think that's natural.

What I want to ask whether this pipe on your bike is hollow or is it stuck in that way and which way should it be?

Thanks for reading and commenting

this is the pipe I am talking about:

View image: coolant tank

 

If I understand your question correctly, the tube/hose should be open to vent and run away from or past the exhaust in case of overflow.

 

yeas that's how I thought it should be, thanks