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Thankyou sir, i emailed rw to find out what they have on offer for the zx an am waiting to hear back..I will strip car once i gather sum bits an see what is happening with the drivetrain thanks... Kyosho fan 2 any idea on drive ratio so i can work out what spurs an pinions i might need? Thanks again mate very helpful...

Wahey, finally managed to get the user name i use everywhere else so goodbye kyosho fan2.

Ive done a complete ratio with a site, i will find it for you and post the link. Fyi all but one kyosho driver used a 100 tooth spur gear, Bob Gammon liked the 99 tooth on carpet.

Heres what i wrote on Oople forum.

Ok ive worked out the internal ratio and have an exact ratio chart to the Kyosho manual and is 2.214:1 and used a 100t spur and 17t pinion so gives you a range from pinion size 10 to 25 for a cariety of spur sizes so should be enough for all.

So if you use a gear ratio chart like this you have all the info you need to make it. http://www.gearchart.com/index.cfm?f...n=chart.create

bully wrote:Thankyou sir, i emailed rw to find out what they have on offer for the zx an am waiting to hear back..I will strip car once i gather sum bits an see what is happening with the drivetrain thanks... Kyosho fan 2 any idea on drive ratio so i can work out what spurs an pinions i might need? Thanks again mate very helpful...

It also depends on the tire diameter of the tires you plan to use, that's another important factor in the rollout equation.

Assuming you're using tires with a "typical" 2.2" wheel size & diameter--say about 88 or so millimeters--and a 100T spur, you might want to consider trying a 20 or 21T pinion gear. What is the stock spur gear size on a Lazer ZX, and what are you planning to use?

All sorted guys thanks,i worked back from the manuals gear chart an figured the ratio out so i can sort the rest by myself now thanks alot kyosho fans..

100t is the only spur gear made by Kyosho. Having proline tyres or schumacher the car goes well with the same ratio.

bully wrote:All sorted guys thanks,i worked back from the manuals gear chart an figured the ratio out so i can sort the rest by myself now thanks alot kyosho fans..

Let us know what you're going with. Helps out future members with the same question and all.

Easy

5.5 use 21
6.5 use 22 and so on

Be warned youll snap the rear belt as no tensioners were designed in the rear gearbox. I have however done a proto type rear carbon fibre gearbox with tensioners and can handle easily a 4.5 so will use the proto as a template to get a new gearbox designed and will be available to buy. You will need a front belt tensioner and that I have no idea what youll want to use but have designed a cf L plate for use with a tensioner.

I think std spur is 84t,,It will prob be stock motor just easy cruisey kind of runs on practice day or 10.5.. Be a while i gotta save up some more an give her the once over,need turnbuckles,undertray ,body an the dbl wing +6061ky wheels +tyres. Got some 6063ky wheels an RW 100t spurs on the way to use at the track..Cheers for all the help an patience guys

bully wrote:I think std spur is 84t,,It will prob be stock motor just easy cruisey kind of runs on practice day or 10.5.. Be a while i gotta save up some more an give her the once over,need turnbuckles,undertray ,body an the dbl wing +6061ky wheels +tyres. Got some 6063ky wheels an RW 100t spurs on the way to use at the track..Cheers for all the help an patience guys

What was the stock pinion gear size for the Lazer ZX? It's for a spreadsheet gear ratio/rollout ratio calculator I'm compiling. Thanks!

Coelacanth wrote:What was the stock pinion gear size for the Lazer ZX? It's for a spreadsheet gear ratio/rollout ratio calculator I'm compiling. Thanks!

Standard pinion is 20T for the ZX with 88T spur, 0.6 module gears.
Standard pinion for ZX-R is 22T with 100T spur, 48dp gears.

terry.sc wrote:

Coelacanth wrote:What was the stock pinion gear size for the Lazer ZX? It's for a spreadsheet gear ratio/rollout ratio calculator I'm compiling. Thanks!

Standard pinion is 20T for the ZX with 88T spur, 0.6 module gears.
Standard pinion for ZX-R is 22T with 100T spur, 48dp gears.

Thank you very much, Terry. The actual transmission ratio on the Lazers is indeed 2.214:1? And lastly, I'd appreciate to confirm the tire diameter of the Lazer tires. I imagine they're in the neighborhood of 90mm?

Doh!!! I forgot about the Lazer ZX .6 gears. Sorry.

Coelacanth wrote:Thank you very much, Terry. The actual transmission ratio on the Lazers is indeed 2.214:1? And lastly, I'd appreciate to confirm the tire diameter of the Lazer tires. I imagine they're in the neighborhood of 90mm?

The pulley sizes are 31/14, which is 2.2143. Can't help with original tyre sizes though, mine aren't as easy to get at as my Lazer spares.

Awesome. If anybody can measure the diameter of a new Lazer ZX or ZX-R tire, from the tip of one spike to the tip of an opposite spike, that would be greatly appreciated.

I measured a slighty worn set of original zx fronts an they are just under 80mm,new prob 81mm or maybe 82mm max mate..