Will somebody take a look?

[Bill_Van]

I was just going over my 250cfx and comparing notes on the original stock setup. If someone gets the chance, please count the teeth on the main motor pinion.

Here's why:
HH does not show a 9 tooth but that's what mine came with. They start with a 10T in replacement parts but don't even list a 9T.

Might realize some performance gains if I went with a 10 or 11T or even a 12.

[Tande]

Originally Posted by Bill_Van

I was just going over my 250cfx and comparing notes on the original stock setup. If someone gets the chance, please count the teeth on the main motor pinion.

Here's why:
HH does not show a 9 tooth but that's what mine came with. They start with a 10T in replacement parts but don't even list a 9T.

Might realize some performance gains if I went with a 10 or 11T or even a 12.

Hi Bill.....mine came with a 9t.....switched to a 10t shortly after.....

[Bill_Van]

Did you notice much difference in response and/or noise?

[Tande]

Originally Posted by Bill_Van

Did you notice much difference in response and/or noise?

To be honest, it's been so long ago, I don't remember much about the 9t.....except, I felt that the head/speed was a little slow......FWIW, I'm happy with the 10t.....I know, not much help...

[Bill_Van]

Any help is better than none!
I have always felt like it's a little slow. I've got pinions all the way up to 14T so I'll give a few a try.

Also got the MicroHeli CF tail rotor coming today so I'll test with it first since I already have a baseline on performance. Who knows, the right combo might help with the slight tail blow-out I have under full positive after full negative!

Thanks again,
Bill