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Mild pinging under load @ low rpm. Cause?

  • Thread starter Thread starter GelandeStrasse
  • Start date Start date
And you don't have the low end torque in the GS as the other bike did..thats why it pings if the gear selection is too high for what your requiring of the engine.
 
Ok so it pings below 2000 loaded two up, that's good to know, I wonder if they all do that, the old twin didn't. Best I change down sooner". I'm actually mightily impressed with how low it can go!

No, they don't all do that, the GKs seem more prone to pinging for some reason. All of them do better when operated at a proper RPM.
 
I'm actually mightily impressed with how low it can go!
Yeah, I can do that at times, too. All of our 850s (we have had up to four here at one time) are surprisingly tractable down to about 1500 RPM, and will pull away from about 15 mph going around a street corner in fifth gear. We don't do that often, especially with any kind of a load (two-up, uphill :-\\\).


Stoopid! That's me :D
Flat twin not V ;)
Still a "V", just a 180-degree V.
icon_thumbsup.gif


.
 
And 2 up its gonna require more attention to gear selection and RPMS also...especially on the inclines and passing.
 
the pinging that I am getting is under normal "around town" acceleration, when it's fully warmed up, light throttle, 3-5k rpm. I don't lug it. So, that's why it is disturbing to me. Probably a lot of carbon build up from PO's who ran it pretty poorly & skipped a lot of msintenance (from what I can tell, valves were way out when I got it, etc.)
 
Carbs vacuum synced? Checked the timing? Where are the mixture screws at? Baseline starting point on CVs is 2 out from seated.
 
carbs thoroughly cleaned, new boot o-rings & vacuum synch'd. Haven't checked the timing (engine doesn't appear to have had much major maintenance. half of the valves were way out.) So, after water spray treatments & new intake boots, that'll be where I go. Boy, bringing back an old, unmaintained ujm sure is fun!!
 
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