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by cmattina
Mon Nov 23, 2020 10:16 pm
Forum: Four stroke
Topic: Engine Rebuild help
Replies: 5
Views: 159

Re: Engine Rebuild help

Thanks guys. Much appreciated. Might be a couple days yet before they come in, the mail has slowed down once a again.
by cmattina
Mon Nov 23, 2020 5:16 pm
Forum: Four stroke
Topic: Engine Rebuild help
Replies: 5
Views: 159

Engine Rebuild help

Hi guys! I am getting ready to rebuild the bottom end on my 1952(ish) nh350. I expect to receive new bearings and shims in the mail today. I have the cases split, crank is out. I have read that an efficient way to remove the bearings is to simply plop the cases in the oven (350F?) and let the bearin...
by cmattina
Sun Nov 01, 2020 2:00 pm
Forum: Four stroke
Topic: Piston ring gap placement
Replies: 4
Views: 228

Re: Piston ring gap placement

Paul_Linden wrote:Assuming this is a piston with three rings, then the gaps should be spaced equally apart at 120 degrees between them.


Thanks Paul. Yes it is the 3 ring piston.

And I guess it is okay for one of the gaps to be either facing directly front or back?
by cmattina
Sun Nov 01, 2020 1:19 pm
Forum: Four stroke
Topic: Piston ring gap placement
Replies: 4
Views: 228

Piston ring gap placement

Hi,

Just curious if there is a proper placement for the ring gaps when fitting the barrel ?

I presume evenly spaced, but beyond that, not sure.

Thanks
by cmattina
Sat Oct 31, 2020 5:30 pm
Forum: Four stroke
Topic: Vinegar to clean rusted tanks?
Replies: 16
Views: 524

Re: Vinegar to clean rusted tanks?

hi i know it is very good for cleaning and rust on parts and i have not had metal dissolved i have got lots of parts soaking in it at the moment, it cleans up brass and copper nice as well, :D if the bottom of you tanks are rotten it will make it leak like any cleaning products will do Do you dilut...
by cmattina
Sat Oct 31, 2020 3:55 pm
Forum: Four stroke
Topic: Vinegar to clean rusted tanks?
Replies: 16
Views: 524

Vinegar to clean rusted tanks?

Thinking about using some vinegar to get the rust out the oil tank and fuel tank on my 1952 NH. Are there any risks to this?

I have heard both great success and experiences where metal was dissolved by the vinegar...
by cmattina
Thu Oct 29, 2020 9:31 pm
Forum: Four stroke
Topic: Fitting new valves and guides
Replies: 26
Views: 1394

Re: Fitting new valves and guides

Thanks for everyone's comments. It is funny, when i was doing it, I totally presumed it was not the correct way and a "brutish" (in Canada we would say "get 'er done") way of doing it, but I also considered that the bike had likely seen it all and is about the furthest thing from...
by cmattina
Mon Oct 26, 2020 12:04 pm
Forum: Four stroke
Topic: Fitting new valves and guides
Replies: 26
Views: 1394

Re: Fitting new valves and guides

Julian Murphy wrote:Whereabouts are you located?

Maybe somebody on here lives nearby and could recommend a shop.

I'm using a shop in Ipswich. They offer a collection and delivery service. £35


there are a couple shops i can mail the head to. Won't be the end of the world if i go that route.
by cmattina
Mon Oct 26, 2020 11:57 am
Forum: Four stroke
Topic: Fitting new valves and guides
Replies: 26
Views: 1394

Re: Fitting new valves and guides

You certianly seem to live in a remote location. I can think of several advantages - Low risk of covid, hopefully no idiot car drivers and no noisey neighbours for a start! Very remote, I would wager one of the most remote members on the forum. Town is here because of a nearby gold mine. Then again...
by cmattina
Mon Oct 26, 2020 11:51 am
Forum: Four stroke
Topic: Fitting new valves and guides
Replies: 26
Views: 1394

Re: Fitting new valves and guides

A couple of adjustable reamers from China certainly wont break the bank.....All my singles have the same size guides and valves ,3/8",in the interest of uniformity.....Ariel is one of the few british singles that dont have 3/8 valves all round ......thats easily fixed,then you only need one ad...

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