motovita

That is definitely an enduro seat, brake pedal too, looks odd with the Trials peg position (your pegs look good though). That low profile rear tire won't do you any favors when jumping logs. Bar risers with the forks slid up like that seems counterproductive.

It sounds like yourTY has been converted for trail use, Yamaha offered a large optional seat, I don't recall ever seeing one, how about a photo of your bike? A used Trials seat should be fairly easy to find. The help for your suspension is easy to find in the last 40 years of motorcycle developement, as in a newer bike. There is a Trial next month in Newman Lake, WA, about 46 miles from you.

Jumping logs is a technique issue rather than a power issue. I suggest you ride some Trials events and work on learning good technique. Handguards are invaluable if you need to plow through brush.

From memory (gawd I'm old) that's a Pacifico universal plastic tank, haven't seen one in decades.

What did you figure out about your gearbox drag?

MT43 is a horrible choice for your 175. You will feel like you've got a new bike!

1 1/4" will probably work too.

It might only last another 40 years.

If you call Chapparral I imagine they can drop ship you one.

The TR11 tube type is a better bet, it's also a radial and is the same size as the Dunlop you have. Dunlop does make tube type Trials tires but the D908 has always been tubeless only.

Does it behave the same in both directions? If you rotate it until it binds does it rotate freely the other direction then bind up again in the same spot every time? If you loosen the sprocket nut does it change? Is the shoulder on the sprocket on the inside? How did you come to notice this?

The newest TRS sidestand is greatly improved (larger and stronger) over yours. I would guess it will fit your 2017 but check with your dealer. Get both the stand and mounting bracket.

I don't know where you found an article recommending O Neal boots for Trials but I'll say they have no idea what they're talking about.

Did you get two?

The front fender mount and plastic guards were an option, it's missing the fork brace to mount the fender. I don't remember Akront rims on my 2000, was Akront still in existence then?

Is it printed on the seal holder? Look like Paioli off a Beta.

Nice, bonus points for the color matched tie down strap.

That's good to know, I suppose the real challenge is to find an Akront rim that's still straight enough to work with the Tubliss system.

I currently have 11/43 on my 199A, 42 is probably easier to find and should work fine.

It sounds like you're successfully using the Tubliss system on the original 1.85X18 Akront rim on your Bultaco, is that correct?

The 4.00R-18 rear tire is the most important component of a Trials bike. Try to modify your bike to accept one.

I would use the chrome lined hub until the chrome starts peeling off, it can work pretty well as long as the other components are in good shape. I use Domino throttle and levers and much prefer them to the original Amal components. .

Any news?

Alpina was essentially a Trials bike modified for trail riding. The true, and superior, Trials model is the Sherpa T.