A pack of TY175's!

[John H]

Isn't the best handling when the handlebars are centered on the fork tubes?? What you see is the bar clamps sawed off and turned 180º. I know, it's just a thought. You mentioned before about cutting off the bar clamps and adding aftermarket dog bone risers. If I weld these on in the position shown it will be similar to the top tree you have ordered.

[Da Nag]

Now I see it! Very cool.

And, in addition to getting the bars forward - it will look very similar to stock at a glance.

[Lotus54]

Looks good.
  Many guys like the bar ends a little forward of centre for Trials- so your ‘180º’ setup would be easy to get right with proper bars.

Too thick of aluminum for my setup- but I’m sure Dan at Allform can fix those right up at a reasonable price.

[John H]

I didn't know Dan at Alform was still around, if we're referring to the same guy.
I get my new glasses today so no more excuses a bad welding job.
The modified tree turned out nice. It's a bit snug on the 34mm tubes but better tight than loose. The fork stops need to be built up on the frame and reinforced since they make contact on only 1/8" of the stop on the tree. I'll wait until the tapered bearing kit is installed just to be sure nothing changed.

IMG_4433.JPG (192.96 KiB) Viewed 46381 times

[Da Nag]

Looking good, John!

Here are the results of the flywheel lightening. Unfortunately, we didn't weigh it beforehand - but I'll try and remember to get a weight on one of the other stock ones to see how much was taken off.

Here are a couple pics of a stock TY175 flywheel.

tyfw-stock.jpg (155.19 KiB) Viewed 46376 times

tyfw-stock2.jpg (151.01 KiB) Viewed 46376 times

And, here's one after John did his magic. The face was turned down just a hair below the top of the rivets, and a fair amount more taken down outside the rivets.

PXL_20210624_204358815.jpg (76.01 KiB) Viewed 46376 times

PXL_20210624_204424496.jpg (106.53 KiB) Viewed 46376 times

[Da Nag]

The biggest bit o' bling arrived from the Netherlands today.

It's pretty amazing what is being produced for these old bikes.

PXL_20210624_195031441.jpg (131.84 KiB) Viewed 46375 times

PXL_20210624_214916476.jpg (109.25 KiB) Viewed 46375 times

PXL_20210624_214935803.jpg (106.77 KiB) Viewed 46375 times

[Lotus54]

Swingarm looks fabulous.
Interesting on lightening flywheel- I really like the heavy flywheel on my vintage OSSA. I wish my XTrainer had a heavier one, but I’ll have to make one myself since nobody makes one.

Is that a common complaint with those?
(Very nice work on turning it down)

[Da Nag]

On the 175, an awful lot of people seem to like the lighter flywheel. Evidently, it gives it a welcome zap off throttle without impacting control significantly. It also reportedly allows you to get the front end up quite a bit easier without popping the clutch - and spoiled as I am with modern clutches, the less I have to touch it on this bike the better.

But yes, it's an odd upgrade to me coming from modern bikes. Adding flywheel weight on the Vertigos - at least the 250/300 - smooths them out tremendously.

It's easy enough to swap back out to stock if need be.

[Da Nag]

I think I found our resident TY expert Steve over at trialscentral talking about TY175 flywheel weight. The post says stock is around 6.25 lbs., and two other reduced weights were tried - 4 and 5 lbs. The 4 lb' weight was preferred.

John almost got there with mine, losing almost 2 lbs. assuming the 6.25 number is correct. Just weighed it, it comes in at 4.3.

[John H]

It took some heat to finally get the flywheel off. Sounded like a firecracker.
That swingarm is a thing of beauty, I'm jealous but will just suffer with an extended version.
The top tree is finished unless I get ambitious and polish it. Looks weird like your eyes are playing tricks on you. May need heat treated again.

IMG_4440.JPG (278.37 KiB) Viewed 46370 times