Idler Gear Size

[B&H Racing]

As my car currently sounds like a jet fighter I thought I would put everyone out there misery and order a new Idler Gear and Layshaft gear for my SX.

Does anyone know what the standard size is for both ???

Sorry i`m at work just about to place an order and the car is at home.

Cheers Brett

[stegger]

33 Tooth upper U3346 and 23 Tooth layshaft gear U3343
All of the top of my head.

[B&H Racing]

Correct ! that was what was on the car.

Top marks for Steggers

[stegger]

Originally Posted by B&H Racing

Correct ! that was what was on the car.

Top marks for Steggers

I haven't heard that since 1st year primary school

[geerno]

Are the gears supposed to be lubed. I'm on my third set, and want to increase the life of them (tricky when running 5.5).

[stefke]

I ran through my first set of gears in 2 races.

After that, I lubed them with some high speed grease and now they seem to last forever.

[stegger]

Mine are dry and have been since the car has been out, no problems at all. Have your cars got the covers on and the slipper cover ?

[geerno]

My idler gears have the cover over. But I am guessing other people may not race as much as I do. Every weekend, I am racing, and with a 5.5.

I am on my 4th front belt in 6 months. That gives you an idea.

I like the sound of the high speed grease. Let me know more... brand etc.

[stefke]

Originally Posted by geerno

My idler gears have the cover over. But I am guessing other people may not race as much as I do. Every weekend, I am racing, and with a 5.5.

I am on my 4th front belt in 6 months. That gives you an idea.

I like the sound of the high speed grease. Let me know more... brand etc.

I wasn't the only one experiencing rapid gear wear, but a little bit of grease solved the problem completely.

I doubt you'll find the brand I use in the UK (Protech High speed grease)

It's red coloured and very sticky. I bought it a long time ago to lube the gears on my 200mm NTC3 nitro TC (yes, I've turned to the dark side years ago but have seen the light now ).

[geerno]

Yes, the dark side. Better to be electric and muddy

Thanks for the info, I will check it out, see if I can find an equivalent.

[discostu]

you could use the tamiya anti wear greese its simular to the red sticky stuff.

stu

[stegger]

Thinking about it geerno are you racing on dirt tracks in australia ? that stuff gets everywhere so if you are going to use grease of some kind it may attract it more.

[bender]

Use Tamiya ceramic grease - it's the best stuff for these gears.

I run on dusty tracks every week and my gears still look like new

[geerno]

Originally Posted by stegger

Thinking about it geerno are you racing on dirt tracks in australia ? that stuff gets everywhere so if you are going to use grease of some kind it may attract it more.

Yeah, running on dirt tracks, one dusty and one less so. I can't see any dirt in the idler case, so should be alright as Bender said.

My gears are presently lasting about 8 race meets. So it's not as bad as others, like stefke, that is intense 2 races!

[stefke]

Originally Posted by geerno

My gears are presently lasting about 8 race meets. So it's not as bad as others, like stefke, that is intense 2 races!

Racing a lot on astro is a true drivetrain killer. and it's not that they were broken. They were razor-sharp and noisy and I didn't like that.

[DCM]

Sounds like there is the wrong material choice, and hardenning procedure going on, also, the gears should also be teflon coated too, to aid gear meshing.

As for belts, they should, in theory, last for ages, unless there is debris caught, or too high a belt tension to stop belt skipping on small idler pulleys.

[geerno]

I have chewed through more front belts then idler gears. I'm on my 5th front belt, 4th mid belt and still running my original rear belt.

I guessed this just comes with regular racing. Would love to hear any tips on keeping belts alive a bit longer.

[DCM]

do the belts snap, or just wear out, or lose teeth?

[geerno]

They fray on the sides after a few meets then snap, or on one occasion just became super stretchy at one point and unusable.

[MattADH]

I think that the edges fray from running against the guides on the pulleys.

I have only changed my gears once since running the car and it makes it a lot quieter. I also noticed that the gear wear is tapered toards the inside. I dont run any lube and change both the metal and plastic gears at the same time.