Back from the dyno and disappointed - ZR-1 Net Registry Forums

Billy Mild · 06-30-2016

My secondary vacuum doesn't run very when the isn't running. Once a minute or so.

My top end is stock. No porting of any kind. I would be shocked if the cam timing has been changed. Records that came with the car made no reference to that. If my secondaries weren't opening all the way is there a way to check that without pulling the plenum?

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06-30-2016	#33
Billy Mild Join Date: Aug 2014 Location: Kansas City, MO Posts: 838	Re: Back from the dyno and disappointed. Something wrong? My secondary vacuum doesn't run very when the isn't running. Once a minute or so. My top end is stock. No porting of any kind. I would be shocked if the cam timing has been changed. Records that came with the car made no reference to that. If my secondaries weren't opening all the way is there a way to check that without pulling the plenum? Sent from my Nexus 6 using ZR-1 Net Registry mobile app __________________ Looking for a ZR-1 1985 Yamaha RZ350-NOT STOCK 1971 Yamaha AT1-Middle of a restoration