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Chasing down rough running on R69S
- schrader7032
- Posts: 9057
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
- Has thanked: 3 times
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Re: Chasing down rough running on R69S
There was one thing, though. The air screw was set at 1-1/2 turns out on the left side but was 2-1/2 turns out on the right side. Hmmm...wonder how/why it got that way. I did use the EMPI vacuum gages the last time I was synching things. But if the right air screw was a full turn out more than the other side, that might make it run a little leaner which could lead to pinging. I know that there are separate regimes of carburation depending on throttle position, but even the idle circuit is contributing all the time, although maybe to lesser amounts with more throttle. Hmmm...
Anyway, I took the bike out and...wait for it...no pinging!! I kept listening for it in the situations it happened last time. I didn't push the bike any harder than normal. So I'm cautiously optimistic that I took care of something during the cleaning. I'm still scratching my head on the air screw differences, so I might need to revisit that and/or resynch the carbs.
So, thanks for the carb suggestion. That might have been the ticket!!
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: Chasing down rough running on R69S
But you seem to have it pretty close now. Glad you found it!
Dave
- schrader7032
- Posts: 9057
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
- Has thanked: 3 times
- Been thanked: 36 times
Re: Chasing down rough running on R69S
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.