On a strange impulse I bought this a couple of weeks ago....
Its an American import, and to my reading of the frame and engine number (CT1 - 120315) it is a CT3 175, circa 1973.
It starts, runs and selects all gears.
But...(there's always a but, isnt there?)
The kickstart flops about and doesnt engage unless you lean the bike to the right. Not ideal.
Most of the bike seems to be in reasonable order, and there are some common parts to the TY's I'm used to working with so I thought I'd investigate further.
Pulling the side case off showed the problem to be a little more serious than I expected.
Finding half of the broken spring clip was easy, but the other half needed some fishing with a magnet. I also dragged out a sizeable lump of casing...
Ho hum. Time to get creative. I pulled the other side case off in readiness for taking the engine out, and found damage there as well.
The U-shaped hole centre screen, above the clutch arm, is not how Mr Yamaha intended. And all the oil spread everywhere is from an ingenious chain oiling idea...
Put the sprocket nut on the wrong way, and you get a constant stream of oil direct to your chain, ingenious!
Not to worry, so far, nothing completely fubar. Yet.
Engine out. The pine needles are from "The big storm", blowing the buggers under my garage door.
And here's the empty frame. Some cleaning up to do while I decide how best to sort out these little problems. Helps that I've just picked up an AT 125 engine, same crankcases, to compare and contrast, and possibly steal from.
Mark

Its an American import, and to my reading of the frame and engine number (CT1 - 120315) it is a CT3 175, circa 1973.
It starts, runs and selects all gears.
But...(there's always a but, isnt there?)
The kickstart flops about and doesnt engage unless you lean the bike to the right. Not ideal.
Most of the bike seems to be in reasonable order, and there are some common parts to the TY's I'm used to working with so I thought I'd investigate further.

Pulling the side case off showed the problem to be a little more serious than I expected.

Finding half of the broken spring clip was easy, but the other half needed some fishing with a magnet. I also dragged out a sizeable lump of casing...

Ho hum. Time to get creative. I pulled the other side case off in readiness for taking the engine out, and found damage there as well.

The U-shaped hole centre screen, above the clutch arm, is not how Mr Yamaha intended. And all the oil spread everywhere is from an ingenious chain oiling idea...

Put the sprocket nut on the wrong way, and you get a constant stream of oil direct to your chain, ingenious!
Not to worry, so far, nothing completely fubar. Yet.

Engine out. The pine needles are from "The big storm", blowing the buggers under my garage door.

And here's the empty frame. Some cleaning up to do while I decide how best to sort out these little problems. Helps that I've just picked up an AT 125 engine, same crankcases, to compare and contrast, and possibly steal from.
Mark