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CB750F2 .... silk purse from a sows ear.

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SumpMagnet:
maybe I could cut the frame in half...lift it over...and weld it back..... just a bit of touching up needed then.

Spitfire:
Now the fun begins !

Cheers

Dennis

SumpMagnet:
Today the fun does indeed begin.....after a break yesterday for a flight in a Tiger Moth...and the chance to stand next to a Spitfire.....

So today, I started to delve into the top end of the engine.

Turning the motor over on the crank end nut did not feel brilliant in terms of compression. So....it might be the rings, or it might be the bores. Will find out.

Got the cam cover off with not too much bother, and only one screw head showed previous damage, and needed the impact driver. All the others released nicely. The two bolts under the breather cover were unmarked and perfect...so I wonder if anyone had ever undone those before. The others someone had tried to undo...
Under the cover, things were better than I was fearing. I always expect the worst when opening up something like this. It's like a Christmas present from an elderly relative. You have no idea what is going to be in there....but it's usually a disappointment. Rarely do you find what you hope for under the wrapping.

thankfully....this was not bad at all.



First plus point was the cleaar evidence of old oil residue over everything. I had feared dry....rusty cams. What I can see of the cams looks nice and shiny, with no evidence of scoring or wear marks. I have seen much worse.....including a set of Z650 cams that looked like a ploughed field.... 'was a good runner' according to the seller. He was an idiot...according to the buyer. The camchain still has good tension, and was oily...so there has been oil around these here parts.....

Worryingly....it has a full set of brand new plugs. Not a hint of carbon on them. I suspect someone was trying to get this thing to start, and found the electrical issues I was told about. They gave up clearly.



On the plus side....there was no evidence on any of the head bolts, cam bolts or cam carrier bolts to show someone had tried to undo any of them. That is reassuring...as it means I am not going to find someone elses foul up lurkling in here. Just wear and tear. Please go easy on the tear...

I have popped a slug of oil down eacy barrel and given it a few cranks by hand....then ligtly dropped hte plugs back in to keep the spiders out. That can sit over night to seep down the rings and coat the bores a bit. I also need to read up the manual a bit for the correct dismantling sequence. If there is a correct sequence for torquing down bolts..... I want to undo them in the reverse order. It may not be necessary...but I reckon it to be good practice. Plus I want to get an idea of how it all should fit together before I take it apart.....

tomorrow....I have an appointment with the Spanish Inquisitions chief torturer....sorry....the Dental Hygenist....so a bit of light reading will take my mind off the horrors to come

Trigger:
That looks nice and clean inside, not even any burnt oil staining to the cam towers  :o

petermigreen:
Looks like a promising start John. Happy for you. At this stage I’d put the lid back on and leave it alone.
Welcome to my world of pain, I’m married to a Dental Hygienist!


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