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OK gents. Forgive my ignorance, but can someone please tell me if the cylinders + pistons from an R75/6 are a direct swap onto a /5?

So it turns out the right-hand cylinder head is corroded to a point where repairing it would be cost-prohibitive. I've found a head with a matching part number, so that's one problem solved. The next issue is that there is pitting within the cylinder that I can actually feel, so I'm thinking I will ...

My bike has no fuses, or holders for fuses, or evidence that fuses were ever present. This is odd to me, and my gut tells me that I should install some. What are your thoughts? If it is general wisdom to run fuses on these bikes, how should I proceed? I'm tearing the bike right down to the frame at ...

I've got 6432/9 & 10 mounted to my '71 R75, but they don't have vacuum ports - either on the side or underneath. I know I can get them from Bing and others. Is installing them simply a question of drilling into the carbs on the diamond shaped surface opposite the butterfly pivot? There are two i...

Well, I performed an additional compression test with the carb removed; lo and behold, the dial indicated 120 psi after 5 revolutions. I got about the same result when performing a leak-down test with the kick-start lever. Thanks everyone!

Thanks guys. I did indeed perform the test on a hot engine. This being said, should my next attempt show good compression, I'm still thinking of doing the rings because the cylinder base gaskets are leaking a fair bit, as is the oil pan gasket. I think the pushrod seals are a little sketchy too. So ...

I didn't. I just did it with wide open throttle. No good?

Hello everyone, I've recently purchased a '71 R75/5 with the short wheelbase. The bike has 57k mi on the odometer, so I'll be going over the whole thing. I'm a former aircraft maintainer in the RCAF, so I know my way around machines, but I've only ever worked on Japanese and Italian types. I look fo...