After the test ride, just to Birchwood and back, at speed, on the motorway, I checked the front cylinder heads. Everything seemed to be fine. No oil showing, the exhausts are properly seated and sealed, the bike didn’t blow up so the valve timing and such must have all been right. I patted myself on the back thinking it was job done.
I rode to work, 12.5 miles, mostly motorway, and when I parked up a puff of smoke came up. I panicked. I had a look and there was a little bit of oil dripping from the back of the engine onto the exhaust. All I’d done at the back of the engine was take off the valve/ rocker box cover. So the floppy rubber seal mustn’t have sealed properly. I’ve ordered a new seal and taken the cover off again and cleaned and dried all the surfaces. When it arrives (hopefully tomorrow) I’ll clart it in silicone sealant and fit it. As it’s the rear cylinders I didn’t have to take much off. I should have it back up and running in an hour or two.
I initially had another problem as well. One of the cylinders wasn’t running on tickover. I think the pilot jet must have been blocked. I’ve ordered some Seafoam carb cleaner (just pour it in the tank and it de-gunks everything) and a new jet. I’ll use the Seafoam anyway (no harm in cleaning stuff out, seeing as I’ve already bought it) but the last time I started it it was firing on all four again. If the problem comes back I’ll strip and clean the carbs when I do the valve timing.
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