Do you have a compression testing tool? The plan to borrow one fell through, so my next plan was to take it in to bikeworx in onekawa to get them to do it. I order a lot of parts through them, but haven't given them much busniess, I feel like I owe them.
My other plan was to buy one from SCA and then return it after I'd used it ($60 for a gauge and a check valve? no thanks.) but the girlfriend wasn't so happy with that plan.
Oh man, look what I found, and example of an engine with return springs on the rocker arms! (Image attached)
If you like, you can check out the original article talking about this
Note also in the picture the rocker spring. I put them on that way round to keep the cam follower train protected from any shock loading caused by uptake of the rocker clearance on valve opening. Moto Parilla left them off race engines & I've seen them fitted the other way round too.
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