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1965 R60/2 Overhaul

pinbill
Posts: 38
Joined: Mon Aug 09, 2021 10:13 pm

Re: 1965 R60/2 Overhaul

Post by pinbill »

Here are some more pics.

Top end parts laid out for cleaning on Monday.

The driveshaft, swingarm, fender, wheel installed.

The motor went together well. Everything moves nice and smooth. Ready for the front cover when the breather plate gets fixed.

I got the flywheel runout set to within .0035 and the clutch installed.
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pinbill
Posts: 38
Joined: Mon Aug 09, 2021 10:13 pm

Re: 1965 R60/2 Overhaul

Post by pinbill »

Ok, here are a few more pictures and another update.

I cleaned the top end, hand lapped the valves, and picked up the breather plate from the welder yesterday.

I didn't expect the cylinders and pistons to be in spec, so the original plan was to put the top end back as it was and redo it later. Since it measured so well I am putting on new rings, honing the cylinder, and running it.

Today the pistons are getting cleaned, the valves are getting installed, along with the timing cover and electrics. I should be able to put the top end on this weekend.

Here is a question, the measurements for the rocker supports are between 87.95 and 88.25. I ordered a few shims to bring them up to height (88.3-88.5mm). I was able to set the valve lash and had no problems with the sunken rocker supports. I am wondering how far out of whack my supports are. Has anyone shimmed there rockers? What measurements did you come up with?
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pinbill
Posts: 38
Joined: Mon Aug 09, 2021 10:13 pm

Re: 1965 R60/2 Overhaul

Post by pinbill »

Here are the pistons. They are marked 71.95 with a 12/64 date stamped on them.
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pinbill
Posts: 38
Joined: Mon Aug 09, 2021 10:13 pm

Re: 1965 R60/2 Overhaul

Post by pinbill »

Installed the front cover and electrical. Set the static timing. Honing cylinders and installing motor tomorrow. If the rings come tomorrow I can do the top end this weekend.
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pinbill
Posts: 38
Joined: Mon Aug 09, 2021 10:13 pm

Re: 1965 R60/2 Overhaul

Post by pinbill »

Pistons installed, cylinders honed, heads on, valves adjusted, ect... Initial startup should be this afternoon.

I took the flange off the transmission as well. It was on there tight. Kind of scary. I temporarily put the trans in to do the initial break in runs. It is coming out for a rebuild sometime soon.
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808Airhead
Posts: 1146
Joined: Wed Aug 05, 2009 9:06 pm

Re: 1965 R60/2 Overhaul

Post by 808Airhead »

Looking good! My only critique is I would have never reused valves since they are relatively inexpensive and you don't know how long those are going to keep going. The heads can pop off from fatigue,but in reality these engines are low revving sloggers,so you will probably be fine.
Thomas M.
R69s - R60/2 - R67/2 - R51/3

pinbill
Posts: 38
Joined: Mon Aug 09, 2021 10:13 pm

Re: 1965 R60/2 Overhaul

Post by pinbill »

Ohh no!!! I didn't know the valves were trouble on these bikes. Hopefully they will last the 5k miles I put on them the next twenty years. LOL.

Here is a video of it running. No smoke or weird noises. The thing was pretty well jetted to begin with. With a little carb synching its good enough until the spring. The timing is a little advanced but I will knock it back tomorrow.

I have to sign off for about a month or so until I do the trans. I will post some pictures of the trans rebuild too.

https://www.youtube.com/shorts/eWmU1EsntAg

User avatar
skychs
Posts: 576
Joined: Fri Nov 25, 2016 2:12 pm
Location: Richmond VA

Re: 1965 R60/2 Overhaul

Post by skychs »

Thanks for posting. I'm enjoying the progression and seeing it all come together.

I noticed it still has one of the original coils. With the issue they have are you worried about it at all?
1966 R60/2, 1967 R69S, 1975 R90S, 2020 R1250GSA

sherman980
Posts: 103
Joined: Fri Oct 27, 2006 3:00 am

Re: 1965 R60/2 Overhaul

Post by sherman980 »

Pinbill,
I wouldn't worry about your valves popping their heads off!!! While you may occasionally see a catastrophic top end failure on a /2, they FAR AND FEW BETWEEN unless other things are not paid attention to. To plant a seed that says otherwise is just plain WRONG! An R60 engine is about as under stressed as an engine can be. In my experience, a new valve is just as likely to break (perhaps even MORE likely to break) than a used one that is still in good shape. Back in the day if a bike needed a "valve job" and the guides were still good, it was normal practice to just reface used valves as long as the edges where still "thick enough", recut the valve seats, and lap the valves/seats and reassemble. Have done many hundreds of heads that way with many hundreds of thousands of miles on them since with NO issues over the years. Today, the mentality is to just throw new parts at everything. Often, a good used part may be a better solution given you typically have no idea about the specs the new part was made to. Sorry for the rant, but rumors of heads breaking off /2 valves as a normal occurrence just need to be stopped in their tracks!
Thanks.
Chuck S

User avatar
vechorik1373
Posts: 182
Joined: Fri Oct 27, 2006 3:00 am

Re: 1965 R60/2 Overhaul Rocker tower specification

Post by vechorik1373 »

According to the archive drawings the tower height, (that the rocker arms sit on) is 88.324 to 88.5 mm, measured by putting the head on a flat surface, and doing a depth measurement from the top of the tower to the surface the head is sitting on.

Many times, during my active work @ Bench Mark Works, I shimmed out rocker arms by placing a shim washer under the rocker block, with no ill effects.
Vech
Technical Adviser, Former owner, Bench Mark Works
662 312 2838 cell 9 am to 4pm CST PLEASE!

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