classic motorcycle forum

Sorry I can not be specific as to your 350, but normal crankshaft preparation of crack detection (x ray, magnaflux, etc), balance and surface finishing should help.

Very remiss of them 33d6.
Have purchased some tube locally from Metaland, and I had a piece here for the seat to gearbox piece. Top tube was 1 1/4" x 16ga with doublers inside. I have used 32mm x 2mm with skimming a bit on ends back to 31.75mm to fit castings. The front down tubes were 7/8" x 12ga, and I have used 22mm x 2.5mm. So far so good.

Yes 33d6, fun indeed.
I heated the top frame tube to melt the braze, but what I didn't know was that the top tube was 'double tubed' and fractured around the joint. It came away in my hand once the brass was soft and I had to heat and chisel out the bits left in the head casting. Am going to attempt the seat mount end tomorrow now that I know what to expect.

Thank you Gents for the help.
I had a bit of time today so checked the valve clearances, all good, the compressions are 150 psi in both cylinders, new plugs, checked coils and leads/caps, all good. So I started it up (first kick too) and it would miss on the right cylinder up to 3,000 rpm when it would pick up and run good. I thought it may be an air leak so I pushed the tickler down while idleing as instantly it picked up on the right cylinder. Removing the intake manifold revealed two parts of the gasket missing. Think I found the problem. I cut two new gaskets, a wipe of sealer and put back together. Running lovely now. Time for a road test before tea.

If anybody can tell me the clearances for the valves, I will do a compression test and leak down test to confirm that all is well mechanically. If all that ok, then I will have to look at maybe changing the ignition system.

One of my local club members has been having his 500cc Triumph Daytona repaired by an older gentleman who has sadly passed away. It is a very nice bike with only 9,000 miles on the clock. The bike has developed a slight miss on the right cylinder and he has asked me to have a look at what maybe wrong. It has a single carb, electronic ignition with good spark to both plugs and swapping coils makes no difference. I am thinking that it may be valve trouble and was wondering what I should set the clearances to before I do a compression test. Any advise would be very helpful as I have never worked on a Triumph twin before.

The mechanical bits would be the same I would think, just the body bits like seat, mufflers, handlebars, etc.
Wait till the bike arrives and check with the manual then.

White vinegar from the supermarket works well if not too rusty. Need to leave it in for a couple of days.