Loss of compression on B44

[KiwiB44]

Cruising along at 100kmph and the bike suddenly slowed to 80 and would not go any faster, I thought blocked main jet and carried on for 10km to a scheduled stop on the rally I was taking part in. I could not see any smoke from exhaust etc. The engine cut out when I slowed to turn off into the cafe.

When stopped it was obvious something major had occurred, bad oil leaks in various places and engine VERY hot. Plug looked normal and main jet was not blocked. I noticed during kickstarting it had virtually no compression, and it would not start, so onto the trailer of shame it went. 400km from home which was not particularly convenient

Today (a week later) I begin the strip down

[Godoh]

Sorry to hear your tales of woe. Have you found the problem with the bike.
It sounds like a burnt valve, that would be a nice easy fix.
I have a 1970 victor special, single seat bike put together as an enduro I guess. it has 21 inch front wheel and 18 inch rear.
hope you got it going
Oh I am just over the ditch in Tasmania
Pete

[minetymenace]

to the forum Godoh


KiwiB44...just a guess, did you buy a cheap piston?

[Godoh]

Thankyou for the welcome Minetymenace. I am still finding my way around the site.
I will put some photos of my B44 VS up when i figure out how.
Pete

[KiwiB44]

Sorry to hear your tales of woe. Have you found the problem with the bike.
It sounds like a burnt valve, that would be a nice easy fix.
I have a 1970 victor special, single seat bike put together as an enduro I guess. it has 21 inch front wheel and 18 inch rear.
hope you got it going
Oh I am just over the ditch in Tasmania
Pete

Sorry for delay, a small hole had developed in the piston. Hopefully its just a hone and new piston to fix this.

[KiwiB44]

to the forum Godoh


KiwiB44...just a guess, did you buy a cheap piston?

The prior owner may have done, but the replacement I bought is a PES forged jobbie