Removing & plugging the Pulse Air and Evaporative

[montmil]

Only caution I can think of, is that the metal part that is threaded into the head, may not want to come out after 26 years.

I don't know how common it is to strip the threads out on the head trying to remove this part.

That was a very real concern of mine when I made the decision to dump the system.

I placed some cardboard on the floor, under the heads, and did two days of frequent shots with PB Blaster. Kept the union damp for 48 hours. Slight tug on the socket wrench and away we go with no problems. Both R65s got the same procedure. Same results. YMMV

[Speyman]

I've been telling the kids at the bike shop who drool over the old girl that the PAIR system is a proto-type injection system, sorta like an after burner on a jet fighter. They think its cool.  

[bubby-joe]

If you want it off, take it off .

Only caution I can think of, is that the metal part that is threaded into the head, may not want to come out after 26 years .

I don't know how common it is to strip the threads out on the head trying to remove this part . You just need to plug the holes in the head and airbox and cap the ports on the carbs .

Threads coming with the old parts is very common because of galling, mine went 2 for 2 and left me stuck but a 3/8ths NPT -18 saved the day, cut new threads in the head no drilling necessary, tape up and install 2 tapered pipe plugs not to tight to break the head castings, and off you go no replacing the heads for this now minor problem.

[jakebass12]

i ordered the drain plugs off of motobins and they said that all the drain plugs are the same size. but the hole in the head is 16mm and the plugs they sent me are 18mm. so now i have 2 stainless plugs that i cant use. why wouldn't it fit. what are your sizes?

[Bob_Roller]

What part number did you order ?

[jakebass12]

 the part number i ordered is 80041S. i contacted motobins asking if 18mm plugs was standard on all airhead models and they said yes.

What part number did you order ?

[Bob_Roller]

I think I have your problem solved .

Here's the link to Snowbums airhead tech site .

http://bmwmotorcycletech.info/pulseair.htm

If you read the article, it states you need the drain plugs from an R11XX series bike, oilheads, not airhead bikes .

The oilhead bikes have a 16X1.5 mm drainplug .

The airheads have 18X1.5 mm drainplugs .

[jakebass12]

ok thanks i guess im going to order another set of plugs.

I think I have your problem solved .

Here's the link to Snowbums airhead tech site .

http://bmwmotorcycletech.info/pulseair.htm

If you read the article, it states you need the drain plugs from an R11XX series bike, oilheads, not airhead bikes .

The oilhead bikes have a 16X1.5 mm drainplug .

The airheads have 18X1.5 mm drainplugs .

[wa1udg]

   Another good solution is a pipe cap which fits the threads on the cylinder head fitting  the injection pipe connector screwed on to.  "Some say" you can get them in the proper metric size, but I'll be darned if I can find any.  16 X 1.5 "not tapered " is what Snow Bum suggests.  Tried all manor of websites.  Be nice not to have to worry about getting the cylinder head fitting out.   I would pay DEARLY...

[EGRG]

This is what I did to plug the hole on the head. It is the original adapter with the hose end cut off, sealing it off with a neat brazing job that a local shop did for me. The holes in the air box where plugged with  stainless steel bolts and nuts. Vacuum at the air box and carbs where capped off with rubber auto zone plugs.

[montmil]

Check the hardware aisle at  the big box home improvement stores for a bin labeled "hole plugs / grommets". Plastic or metal, there's one to fit the air box hole after the pulse air system is dumped. Black looks best with a dab of sealer on the inside to keep dust out. Looks factory.

Of course, there's always the BMW timing port rubber plugs but there goes your lunch money.

[wa1udg]

   OK, anybody looking for 16x1.5  pipe caps try the BATINC website  and look for their part number 929 - M16.  BATINC.net    

[jakebass12]

i already bought some timing hole plugs. XD but i still have enogh money for lunch.  

Check the hardware aisle at  the big box home improvement stores for a bin labeled "hole plugs / grommets". Plastic or metal, there's one to fit the air box hole after the pulse air system is dumped. Black looks best with a dab of sealer on the inside to keep dust out. Looks factory.

Of course, there's always the BMW timing port rubber plugs but there goes your lunch money.