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Honda CB750K5 Restoration by Royhall
Johnny4428:
I agree, they look the part.
McCabe-Thiele (Ted):
Those carbs look fantastic - I like the fact you can see the frame number as well - my powder coater asked me if I wanted to have the frame number masked off - I said yes but he forgot so you can't see it anymore you have to rely on the plate. grrrr
Laverdaroo:
lovely set of carbatooters they look fantastic :)
royhall:
After James's triumph with the police bike in what appears to be such a short time, this 750 is crawling along at a snails pace. I really don't know how James has the time and energy to achieve what he does, probably doubles his day by not sleeping. ;D
Anyway, as you know from previous posts this one came with chain break damage to the crankcases and I bought a seized spare engine off James for the cases. That meant I had two engines to take apart and the spare engine was a royal pain in the arse to strip. I think it has been sat in a damp atmosphere for a very very long time. As it turned out, it was a good buy as it's given me the parts I required to replace the damaged parts in mine.
The chain break had been filled with clear silicone which had layers of old black chain lube and crap over it. I assume from the grease that the PO carried on using the bike after the cases got smashed. The gears have milled the insides of the cases and oily swarf is filling the bottom case, there was way more in the sump pan.
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The spare engine finally came apart after lots of PlusGas and heat, I was careful to make sure that if there was damage it wasn't to the crankcases. The only issue was one broken 6mm bolt at the front of the case that was rusted so tight I had to drill it out. I was expecting to have to use an insert to repair it but managed to drill it bang on centre and clean out the thread (that's probably a first for me). It is very slightly loose but I think it will be okay.
Although the original engine turned okay, there appears to be some damage to the crank. The damage actually feels very smooth so I'm wondering if it was caused by soft aluminium swarf or it's a surface problem on the crank itself. Possibly some white metal from the shell due to not being turned for years, I may try to polish it off. Anyway, the crank from the spare engine is in good condition although the alternator rotor was as good as welded onto its taper. It took heat, easing oil, and a sacrificial bolt and heavy hammer to get it off. Bloody thing has ruined my removal tool. At one point I had the removal tool, heat, oil, and a three legged puller on it and it still didn't budge. At least it's off now with no damage done. Long ago someone took the cover off the left side and it had all gone very rusty.
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Both the engines are now apart and the cases are nearly ready for vapour blasting. At some point I will have to go though all the parts and pick the best of the two for the engine rebuild. The parts that made it to the scrap pile were the top and bottom damaged crankcases, the cylinder block-pistons-conrods from the spare seized engine (again they are welded in there) the cylinder head from the spare engine (broken fins and two broken spark plugs plus all valve seized that tight they cant be hammered out). Shame about the scrap bits as I was hoping to sell the bits on to offset the cost of the spare engine. If it was a Brough Superior I would have salvaged the parts, but they were far too damaged to be worth it on a Honda. Anybody wants them there yours for the price of the postage. I am keeping the damaged top case until it's registered with DVLA as it is proof of the original engine number.
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There are lots of other bits done that I haven't covered yet. I really must try to keep up with the build thread, but it's a choice between being in the garage doing the bike or sitting at a desk typing. A clear winner there. Plus I keep doing things and forgetting to take photo's. Must try harder.
royhall:
The postman has just called with my V5C from DVLA. Not too shabby, it's taken 2 weeks and 5 days including post time. Thanks to James for the V55/5 form that he pre-annotated with all the correct details. If anyone wants a copy of that just ask. I have checked all the numbers on the V5C and everything is correct first time out, including the change of engine number. She is now LFM 992N, and I have even remembered to declare it SORN as it's not insured yet.
Edit: I don't need to keep the upper crankcase for it's number now the V5C has arrived.
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