cb650 engine rebuild Step 1 of 4
I’m rebuilding my 79 cb650 engine.
The engine leaked a shit ton of oil from the rubber o-rings around the head gasket. (Common 4cyl problem on old Hondas.)
My engine fins have always been completely covered with caked on oil, grease and dirt. If you didn’t already know, the engine fins are what cool your engine. So to say the least, my engine prolly wasn’t properly cooling itself as much as it should have been. No matter how much I cleaned it, 2 weeks later it was gross again.
In my plan to reduce overall engine temperatures, and efficiency, I’m doing a new gasket kit, having the cylinder jugs measured, and having the cylinder head pressure tested to see if everything is still within spec. Possibly installing a cb750 oil cooler.
Step 1 – Get the engine apart
Step 2 – Clean everything
Step 3 – Have cylinder jugs and cylinder head tested
Step 4 – Reassembly with new gaskets, new piston rings, possibly oil cooler
13 responses to “cb650 engine rebuild Step 1 of 4”
Published - Aug 3, 2015
PA trip was so much fun. Like we always say, getting out the old bikes to camping and checking things out is the best. We only had 5 days on the road and I think we made the most of it. Photos by Alex and myself. Day 1: Met up at Ben’s garage and then […]