GT380 Timing Gear

[Blake.80486]

I picked up a GT380 that needed a lot of work. Mostly as a project.
It needs a new timing gear (the plastic one).
No-one makes new ones, all the ones I could find where NOS, and nylon shrinks, causing it to crack.
I'm planning to machine a new one out of bronze.

I'm wondering if there's any interest in me selling them.

Thanks.

[Alan H]

They are plastic/nylon so they don't damage anything when they break.

[yeadon_m]

There was briefly a fashion to make them from metal but as Alan says, they're meant to be able to break.
Whether or not that makes sense (I'm never been convinced it does....it only turns the points cam so its hardly a loaded component) I've heard that a metal gear will be noisy. That might be true and might in fact be the real reason they're nylon!?
Cheers,
Mike

[Blake.80486]

I really don't see how anything in there could seize up enough to require a sacrificial gear.
As for noise. A bronze gear on steel won't be audible over the engine. Or the steel on steel gears right beside it (though those are helical).

[Drewski]

Some info from a couple of years ago here:-

viewtopic.php?f=2&t=10324" onclick="window.open(this.href);return false;

In the Suzuki Bulletin they say about the nylon gear ".....which is designed for silent operation........"

One way to find out I guess

[Zunspec4]

Hello Blake,

In the days when model airplane propellers were commonly made from nylon/plastic a tip was to soak the props in water overnight to replace the lost water if they had been stored for a while. This returned them to a good condition without the fear of one of the blades departing at 10,000 rpm. I would guess the same process would do the same for long unused plastic timing gears, hot water is even better.

Cheers Geoff

[CumbriaSuzuki]

Have you thought of making a few out of nylon. Cheaper and faster and easier.