Misfire/brapping? Under heaven acceleration
I have a Duc DS 1100 engine in my s2r.
Just had it tuned, dyno'ed and thoroughly checked out.
Rode 300 miles Monday with no issues.
Tonight, while riding it started sort of slipping / missing / misfiring?
This happened under hard acceleration above 4K rpm.
Clutch plates are new enough <500 miles. - coils are new - ignition cables are unlikely. Plugs are less than 1k miles and gapped at 40. Given that it's a dual spark and that each plug has its own coil, I am doubtful that there's an issue here - timing was set and custom mapped by Rexxer - I think this would have shown as an issue during Dyno as well.
I'm thinking valves or chain/sprockets. I'll check those out tomorrow, but anyone with other ideas or similar experiences?
I was surprised to find little doing a search.