Breather pipes to Air Box help required.

[andyuk454ltdbiker]

Looking for pictures of the breather pipes to breather air box.

I have had to buy a new reconditioned engine as my old one was damaged too much by Flywheel Rotor exploded as I was at speed. I had to travel over 400 miles to get home and did too much damage, but the new engine has the better flywheel rotor that does not explode.

What I am looking for, as my old engine did not have breather pipes rocker cover to allow the engine to breath, they were just plated off. The new engine on the other hand has breather pipe attachments for the breather pipes to be attached to then they lead off to the breather air box.

As I have no idea what should be there, as the old engine did not have these pieces on it, I need to find out what should be there.

The bike itself is a European model, unluckily, and parts are difficult to find, but not impossible.

If anybody has any idea what I am talking about and has a clue please provide me with a little help.


Thanks in advance. 

[bikeman]

what you are on about is the PAIR system and is just a emissions device for areas where there is a clean air laws. you don't need it on at all. it does nothing to loose it. 

as your bike doesn't have it fitted anyway just take off the vented covers and replace them with the blanking plates off the old engine. then trash all the stuff that the pipes join to.


I am assuming since your bike never had this on there your in a area where it is not required.

[knoizy]

Yep, PAIR rubbish no good to man or beast. There is a crankcase breather that goes into the airbox, short L shaped pipe that should still be in place and if the PAIR has been removed then make sure its original airbox hole is now blanked off.

[bikeman]

Oct 9, 2018 4:41:21 GMT -6 knoizy said:

Yep, PAIR rubbish no good to man or beast. There is a crankcase breather that goes into the airbox, short L shaped pipe that should still be in place and if the PAIR has been removed then make sure its original airbox hole is now blanked off.

I was assuming from the op's post the bike itself never had the pair system but the new engine has. in that case there will be no pair pipes attached to the air box. just the pipes on the engine cover if he has the old engine it's a simple job to remove these and replace with the original blanks. 

[9ballbilly]

For what it's worth I agree with what was already said.


One of the first things I did on my '85 was junk the PAIR system and install block-off plates on the reed valves.

I also junked the air box and replaced with pod filters. Lot easier to get to things now.

[andyuk454ltdbiker]

thanks guys. I have blocked off the breathers as has been stated with the blanks, but I do have a small problem left, which i will figure out eventually lol.

As for now the bike runs good, its just that 6k misfire problems you can get. As this new engine has different size spark plugs to it than my old engine i will have to find out what I need to use. I have a good shop close by which will type match the plugs but its just a pain to do.

once again ty for the info.

[eaglerider]

Different size plugs? You mean the numbers? Use NGK plugs (these engines like these best) and if I remember right DE 8 or 9 is the correct number.

[andyuk454ltdbiker]

well I have 2 types of spark plug, on the old bike I had the wider NGK plugs, but on this one it has the narrow NGK's. I am going to a dealer/shop to get the right plugs next week, and you are correct it should be DE 8 or 9, but i will go for the 9's if i can.

[andyuk454ltdbiker]

when I have a few mins spare I will take a photo of both the plugs, one from my old bike engine and one from my new engine.