I tore into the primary side of my bike this weekend to change to a 30 tooth front pulley and add my chrome inner primary that has been lying around since August. The job went well with no problems, although time consuming. At 6:00 PM on Saturday night when the damn Harley shop closes, I had everything back together and pulled the drain plug out of my old inner primary to install it in the new one. The old plug is the standard 1/2-20 plug and is a little too small for the hole on the new one. The new one almost looks like pipe thread? The cover part number is Harley 60794-06B.
Does anyone know what drain plug I need to buy?
Thanks in advance!

 

I'll say up front, I don't know what drain plug that primary cover part # uses.... you say the hole is too big for the standard 1/2-20 drain plug.....

I am unfamiliar with any primary drain plug that is larger than the 1/2-20 standard drain plug...... I know of two smaller sized primary drain plugs dating back into the EVO years, but no OEM plugs bigger than the current 1/2-20 drain plugs

Was that primary cover you bought a used part? If so, maybe the drain plug was stripped and retapped...

I have heard of "oversized" drain plugs for use when the OEM plug is stripped, and new threads are tapped into the old drain plug holes...... I believe those are usually 9/16-18 ...

You may want to search for "oversized harley drain plugs" and see what you can figure out, or try a 9/16-18 oversized drain plug...

Good luck with your drian plug search

 

Thanks for the reply, I will order one this morning and give it a try.

 

Post a picture of what you have and what the problem is

 

Before you order something, go to the hardware store and buy a 9/16-18 bolt and see if it threads in.

 

I have a 9/16-18 tap I will try on it tonight and find out. I can try to take a picture while I am under it.

 

There was a video about the primary oil change. IIRR some do use a pipe thread. Maybe 1/4" pipe?

Tom

 

I will know tonight, Thanks for the info.

 

My 04 Softail has a 1/4 -18 NPT -(National Pipe Tapered). However, don't think the cover is original since manual says it should be the MS fitting (washer face with a steep bevel for o-ring with the 1/2-20 NF straight.

 

Early primaries used a 1/8 inch pipe plug. The 6 speeds are different. You want a 1/2-20 drain plug.. HD should be able to supply you with one..