Author Topic: Frankenstein that baby!  (Read 1446 times)

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Offline eigenvector

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Frankenstein that baby!
« on: September 09, 2017, 02:39:46 PM »
Sorry - no pics, despite the title.  But for while I was wrestling with the petcock on my v45 Sabre.  Dang thing leaked and filled my entire engine crankcase with fuel.

After draining the oil/gas mixture off, I refilled it with oil, and now I'm using my new petcock - a BMW R75 petcock.  It just so happens that BMW used the same threads on the R75 that Honda did on this particular bike.  Weird too - they only used it for like 2 years on one model.  20mm with 1.0 pitch threads.  normal petcock - 20mm with 1.5 pitch threads.  Go figure.  Well - anyway, at least BMW came through for me, and it was NIB and 50 bucks cheaper than the Honda petcock. :D  Sweet!

So I filled the tank back up and took her for a ride today.

Scared the heck out of me - for the first 15 minutes or so it smoked like a demon, huge billowy clouds of white smoke poured from the mufflers.  Make me think that I blew the rings or something.

Must have just been residual fuel in the crankcase or something - after about a mile or so it stopped smoking and rode on like a champ.

BMW to the rescue!
Rob
--------------------------------
2018 HD Softail Heritage
1979 CB750K Limited Edition
1977 CB550K
1984 CB700SC Nighthawk
1983 VF750S Sabre

Offline ekpent

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Re: Frankenstein that baby!
« Reply #1 on: September 10, 2017, 05:52:22 AM »
 Eigenvector getting some of that extra gas out of his exhaust pipe  ;)    :D

Offline Stretch

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Re: Frankenstein that baby!
« Reply #2 on: September 10, 2017, 01:02:45 PM »
Was it leaking through the vacuum tube to the cylinder? +1 on the fix. Petcocks are pretty cheap on fleebay if you need it back for the Beemer.
'78 CB750K
An assortment of Hondas, mostly V4s

Offline eigenvector

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Re: Frankenstein that baby!
« Reply #3 on: September 10, 2017, 01:22:07 PM »
I couldn't figure out where it was leaking. 

I "fixed" it a few times, never took though.

Frankly I hate those overly complicated vacuum actuated petcocks - more trouble than they're worth in my opinion.
Rob
--------------------------------
2018 HD Softail Heritage
1979 CB750K Limited Edition
1977 CB550K
1984 CB700SC Nighthawk
1983 VF750S Sabre