Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I'd use tape for the internal threads, and the rubber plugs. If you are on good terms with a machinist, he could make a couple plugs out of hard plastic that would do the job matching the diameter and thread pitch.Thanx John.
My monkey wrench with numbers (aka caliper) reads just short of 12mm. My thread gauge shows 1.0 mm/t.
This is an odd combination, so I thought I'd ask if anyone KNEW what the spec was.
As far as I can tell the standards are 1.75 mm/t , 1.5 mm/t, and 1.25mm/t for M12 bolts.
Maybe I'll just make a couple rubber plugs ...
I think I'll reassemble and reinstall as is.
The original symptom was stalling after 5 or so highway miles. The left shut of valve's internal rubber seal had rotated causing very limited flow in Open position. No flow in the Reserve position.
The engine would resume running when the right reserve valve was opened.
I've seen this before, long ago, and now we'll see if the correction of that internal seal's seating "fixes" the symptoms.
If any fuel related symptoms recur, I will look into the Caswell stuff.
I've sealed gas tanks before (V7 Sport etc.) and it can be a bit of a job. So using the right chemicals is mandatory. Caswell looks like the stuff to use.
Thanks for the info's.
~Alex
Being the owner of an XT 500 I agree !The new production "sugar cube" petcocks aren't made correctly and the rubber seal inside rotating is a common issue. I don't buy them for that reason. A better idea is the kit that MG Cycle sells - adapters with later "diamond" shaped petcocks.
The first tank I ever sealed with Caswell was the one on my vintage Gravely garden tractor. It had pinholes, but no rust. That was 15 years ago. Sits year round with E10 gasoline in it. That old tractor vibrates more than any motorcycle I've ridden (except maybe the Yamaha XT500). The Caswell still looks like the day after it was done - no change in color, no cracking, flaking, etc.