1974 Yamaha TX 750

Re: 1974 Yamaha TX 750

Postby Larsbud64 » Thu Sep 29, 2011 1:18 pm

IT’S A LIVE!!!!!!
:139
Well I got her to fire up and keep running for the first time since I bought her. Man does that feel good!
Still idles high and blows smoke, but I’ll work on that next. Just felt good taking the old girl around the block a few times.
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Re: 1974 Yamaha TX 750

Postby GNC » Thu Sep 29, 2011 5:15 pm

:151 :123

she looking very trim round the rear end

nice work
T140E
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Re: 1974 Yamaha TX 750

Postby Tman » Thu Sep 29, 2011 8:51 pm

Looks good to me..... :29
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Re: 1974 Yamaha TX 750

Postby Larsbud64 » Fri Sep 30, 2011 1:09 pm

Thanks, still a way to go before she's finished (if ever!!)

A pic of me heading out, sorry the pic is poor, but it was already getting dark.
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Re: 1974 Yamaha TX 750

Postby MOUSE » Sat Oct 01, 2011 10:00 am

:39 :39 :123
"My arthritis has gotten so bad I can hardly grip anything, my cataracts seem to get worse every day, I have gout in my right leg and can't bend my knee and I can't hear anything.
But thank God I can still ride
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Re: 1974 Yamaha TX 750

Postby Larsbud64 » Mon Oct 24, 2011 1:08 pm

Well finally had a brake in the weather and the sun came out this weekend. I pulled the bike out of the garage and took her around the block a few times to warm her up for a compression test. Well the results were pretty well what I had expected. The left cylinder is running as 150psi, but the right one is only at 60psi. I guess the next thing for me is to pull the engine out of the bike and start the tare down.
Here’s question: should I replace both piston rings or just the cylinder that bad? The odometer it only reading 5800 miles, but I have no real history on this bike.
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Re: 1974 Yamaha TX 750

Postby Welsh Wizard » Mon Oct 24, 2011 11:44 pm

best to keep things balanced, until you get the head off no way of telling, it might just be the valves, have you tried putting a bit of oil down te offending cylinder and check compression to see if it comes up yet?
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Re: 1974 Yamaha TX 750

Postby Larsbud64 » Tue Oct 25, 2011 12:54 pm

No I hadn’t put any oil into the cylinder head, because I have oil running out the exhaust, header and out around the gaskets on the right hand side. The plug is also wet with oil. No I think adding oil is already being done for me :)
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Re: 1974 Yamaha TX 750

Postby Barrett » Tue Oct 01, 2013 2:32 am

The bike looks great! I figure while questions are being thrown around about TX750s I'd give it a go as well:

I've got a '73 TX750 that won't start. It's got spark and compression, but whenever I go to kick it (the electric starter doesn't work), the thing tends to kick back. Felt like I almost broke my ankle on the thing. What could be causing it to do that? I reset the point gaps and it seemed to do better, but it still kicks back pretty hard. Thought I'd adjust the cam chain tensioner, but I'm a bit puzzled by the configuration. It's not like on a CB. Any and all advice would be most welcome!
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