1st gen/2nd gen trans swap, the saga continues

[Venturous Randy]

After setting the 2nd gen gear set in the 83 engine bottom half, I realized that there was an alignment problem. After I aligned everything, I believe that two of the three forks are exactly where they need to be. the problem is the one that controls 1st and 3rd gear. Yamaha increased the width of the teeth on that gear slide and with the slide not engaged, it made the 1st gear dogs too close and the 3rd gear dogs too far away.

The next step would be to get the correct fork and see if that solved the problem. But that was a problem in itself. According to two different dealers, there was not a new fork available anywhere in the US and the only place to get one was Japan. I then went online and checked with any salvage yards and anywhere else that might have a 2nd gen engine that was being parted out. I had just about given up when my son Brian, who had just stopped by, suggested I check my paypal history in trying to find where I had bought the 2nd gen gear set . Not only did I find the purchase, which was Feb 24, 2010, but the purchase had a phone number listed. I called it and not only did I get an answer, but he told me where to look and the forks and tumbler were still available on an ebay - buy it now listing, where I rarely look. The price was $25 with about $12 for shipping and I have already purchased and paid for it.

So, now I am in great anticipation on this being a viable option, not only for solving the 83/85 trans problem, but for any 1st genner that wants to upgrade their trans to the slightly wider spaced gearing that the 2nd gens have. For those interested, I will keep you upgraded on how this progresses.

RandyA

[flb_78]

Could a 2nd gen engine be fitted in a first gen if the heads were swapped?

[dingy]

Could a 2nd gen engine be fitted in a first gen if the heads were swapped?

 

 

OK, I am not trying to be snippy here, but...

 

Why in God's name would someone want to do that., That is one of the good things about the 1st gens. The motor has some get up and go.

 

On a less snippy note. Due to the finned side covers on the 2nd gen, I don't think the motor would look good in a 1st gen. Saying this because due to head change, these don't seem like they would work. And without them, the block would look less finished.

 

Gary

[flb_78]

OK, I am not trying to be snippy here, but...

 

Why in God's name would someone want to do that., That is one of the good things about the 1st gens. The motor has some get up and go.

 

On a less snippy note. Due to the finned side covers on the 2nd gen, I don't think the motor would look good in a 1st gen. Saying this because due to head change, these don't seem like they would work. And without them, the block would look less finished.

 

Gary

 

I was just postulating.

 

What makes the first gens have so much more power over the 2nd gens? I thought it was the head design and the cams?

 

I would think that one may want to do it for the wider spread transmission range.

[Yammer Dan]

Could you put a Hardley engine in a 2nd Gen to pep it up???

[skydoc_17]

The Second Gen. motor is NOT a direct swap for a First Gen. Motor because the front of the Second Gen. motor uses Mounts connected directly to the Cylinder Head instead of the motor mounts in the Crankcase of the First Gen. motor. The Jug/Crankcase area of the First Gen. that has the stock motor mounts will not bolt up to the Crankcase of the Second Gen. motor. The Cylinder Heads from the First Gen. OR the VMAX will not bolt to the Second Gen. motor and fit in the Second Gen. Frame. Just a general FYI. Now as we all know, ANYTHING can be "Custom Fabbed" to fit, but to answer your question, this is not a swap that can be done just by unbolting some parts and installing them in another bike.

Earl

[flb_78]

The Second Gen. motor is NOT a direct swap for a First Gen. Motor because the front of the Second Gen. motor uses Mounts connected directly to the Cylinder Head instead of the motor mounts in the Crankcase of the First Gen. motor. The Jug/Crankcase area of the First Gen. that has the stock motor mounts will not bolt up to the Crankcase of the Second Gen. motor.

Earl

 

I did not know that, Im not familiar with 1st gens, that's why I was asking.