Here are the before and after pictures of my TY175

It is now a TY200

Before

And the after

It's took almost year and lots of new and rebuilt parts. But I'm glad I did, it's a great bike to ride.

Edited September 17, 201015 yr by bestrcpilot

i like it, reminds me of my first yellow TY80, who made the clutch cover?

The Clutch Cover is a Yamaha part. It came off a 1975 YZ125 Bolts right on with the only change being the rod for the Kick starter spring needs to be shorten by 0.400 inches. It is also 2 1/2 pounds lighter then the stock set-up with the oil pump. The newer air-cooled (76 to 79 I think) YZ cases will fit with a little more work there are a couple of spots on the case that need to be filled in order to work. If anyone want's or need pic for this mod let me know. I have done a couple already for friends

Is that a Yamaha fork brace/ fender mount?

No Sorry it's not a Yamaha fork brace. It's a home made one. Just trying to take some of the flex out of the stock forks, Still looking for a good set of TY250 forks for it. Hard to find a good set on this side of the pond.

Is the exhaust a WES as it looks like one which i had on me TY175 back in 83. I drilled and tapped the WES and refitted the exhaust guard on which would look better. Brings back fond memories like points condensors and no brakes after going through deep water. Nice job

The Clutch Cover is a Yamaha part. It came off a 1975 YZ125 Bolts right on with the only change being the rod for the Kick starter spring needs to be shorten by 0.400 inches. It is also 2 1/2 pounds lighter then the stock set-up with the oil pump. The newer air-cooled (76 to 79 I think) YZ cases will fit with a little more work there are a couple of spots on the case that need to be filled in order to work. If anyone want's or need pic for this mod let me know. I have done a couple already for friends

yes please

The exhaust is a WES From Sammy Miller.

As people are asking about the YZ case on the TY here are the Mods that need to be made to the

YZ125 case to make it work on a TY

This Picture shows the Hole that needs to be moved. The Gasket is from a YZ125 layed over a Stock TY Case

I find that it is easier to grind away the front side of the hole first. Then build back up with the JB weld

and then to re drill the hole in the right place

This Picture shows the three places that needs to be filled in the YZ case to fit

And here is the spot to be filled at the top of the case

And here are the two places that need to be filled on the Bottom and back edge

I use JB weld to fill in the spots that need it and the Hole that gets moved. I use clear tape to the edge of the case to build a Dam so the JB weld flows and stays where it is needed. Be sure to roughen up the case first in order to get a good bond .I use a small grinding wheel in my drill. JB weld take about 24 hour to really set-up hard so take your time. After the JB weld is hard use a file to flatten out and you may need to add more JB weld in order to get things nice and flat

JB weld is a epoxy that when hard can be drilled or machined, So any epoxy that can be drilled and machined and will hold to metal should work.

Lay a TY175 gasket over the YZ125 case in order to see if the fitment is good.

If your TY175 has the foot peg mounts under the engine then you need to grind away the bump on the bottom edge of the YZ case that you filled in, you do not need to grind away all of the metal from the bump just enough to clear the foot peg mount.

The Rod for the kick starter return spring needs to be shorten by 0.400 inches in order for the YZ case to fit sorry no pictures of this. I use a cut off wheel in a small hand grinder to do this, just cover the clutch and kick start gears first so no grinding dust gets where it should not.

All mentions of top, bottom, front or back are for when the case is mounted to the engine and not for the orientation in the Pictures

The YZ 125 clutch cover from a 1974 is the same as the TY175, Both have a oil pump.

The 1975 YZ 125 clutch cover bolts right on with only the mod to the kick start return spring rod.

The 1976 to 1979 YZ 125 clutch cover will work with the above mods.

Now this is info for the US models but as all TY 175 engines are the same it should work on all the other as well

No Sorry it's not a Yamaha fork brace. It's a home made one. Just trying to take some of the flex out of the stock forks, Still looking for a good set of TY250 forks for it. Hard to find a good set on this side of the pond.

Did the brace help? Is it steel? What diameter is the rod? I need to make a brace for something similar.

Good Job done on that bike.I did the same with my TY 175 and put the Clutchcover of a YZ 125 on,also the alloy petroltank of a TY 250.

Have a look:

http://www.trialscentral.com/forums/index....showtopic=28719

Chrs:Mike

I found these two 1w1 covers, just in case anyone is looking for one. I have one already for my TY175 and it's all shiny!!!