hello gurus!
A bit of necessary maintainance on the DR. Single pipe, 4v head.
The old pipe finally gave up the ghost such that no amount of GunGum would keep the gas going down the pipe. I had previously purchased a 2nd hand pipe (aus Deutschland).
Aber! Ich habe ein frage: wenn habe ich der auspuf.....
Ok, ok! I ground off the remnants of the nuts, removed the pipe, and prepared to mole-grip out the studs. Plenty of WD40, and, thinks I, a bit of heat.
Noisy heat! Just run it! I didnt expect it to run, but actually it was ok. Its lumpy as hell anyway!
I noticed that with each ignition stroke, and the exhaust valves opening, you could actually see blue flames in the exhaust ports. Almost exiting to atmosphere but not quite. I suspect, were there a pipe on there, it would be going down it...
Is this normal? Will I be burning my exhaust valves? The usual white deposits on the stems, but otherwise, just carbon present. The old pipe never got cherry-red or anything like that, but could this explain the pinhole (it was very close to the head). The old pipe (admittedly almost 20 years old) was very thin at that point.I am presuming it must be as the cam cannot really be out, ditto the timing (all CDI etc).
Anyway, just an observation. I've never run a motor without any kind of header before.
cheers all
a
