Competition only stators

members own home-made or self sourced MT related items
Post Reply
Speedshop
Posts: 360
Joined: Tue Oct 13, 2009 5:57 pm

Competition only stators

Post by Speedshop » Sat Apr 25, 2015 1:15 pm

We now have available competition stators for the 604 engines. These give an extra 2-3 HP at the crank.

They are fully remanufactured; the old windings removed, the dried out insulation stripped off, a new base layer applied then rewound for competition use.

Note - there is no provision for charging a battery or lighting!

These are on an exchange basis or you can buy them out-right. The exchange option is considerably cheaper.

http://www.rexs-speedshop.com/epages/es ... /RTX-Gen-3

Image
0 x
www.rexs-speedshop.com
Classic Performance

User avatar
namtip
Posts: 516
Joined: Tue Aug 31, 2010 9:03 am
Location: Crawley

Re: Competition only stators

Post by namtip » Mon Apr 27, 2015 8:12 pm

Interesting. How do they produce more HP? Couldn't you just disconnect the battery-charge/lighting coils for the same effect (assuming the extra HP is gained by saving on the drag caused by inductance)?
0 x

User avatar
Minter
Posts: 4412
Joined: Sun May 30, 2010 7:42 pm
Location: Burlington , Shropshire

Re: Competition only stators

Post by Minter » Mon Apr 27, 2015 10:24 pm

namtip wrote:Interesting. How do they produce more HP? Couldn't you just disconnect the battery-charge/lighting coils for the same effect (assuming the extra HP is gained by saving on the drag caused by inductance)?
hi Colin it think its down to a reduction in magnetic field but I'm sure Marcus will be along to explain all the benefits.. Ill be testing one on the 405 very soon...
0 x
SPORTAX Racing ROTAX
http://www.sportaxracing.co.uk
MTRC Shopkeeper
http://sportaxracing.co.uk/product-category/mtrc-shop/
Manuals & Technical Publications on above MTRC shop link

Speedshop
Posts: 360
Joined: Tue Oct 13, 2009 5:57 pm

Re: Competition only stators

Post by Speedshop » Sat May 02, 2015 7:25 am

To completely off load the magnetic circuit you need to connect all the phase windings to the 'Y' joint, where all three connect. OK disconnecting the plug will reduce the drag but to get it down to just the power needed for the magneto you need to fully null off the charging coils as even unplugged they are sitting there with power on the terminals. Apart from connecting each end of the of the windings together so there is no output the other way to do this is to remove the windings altogether.

This stator has been developed purely for racing where having a newly rewound part on fresh insulation is considered important for reliability. Removing anything thats not needed gives simplicity of wiring and lower weight. With lighter wires, a smaller HT coil and few other parts we pared down we saved nearly 3/4 of a kilo on one rider's bike, he was dead chuffed and ordered 2 full sets of ignition parts from us.


So yes unplugging the generator will off load it but not fully and you are still dragging unwanted weight around. It depends on what you are looking for, some people want just an improvement, some want every last drop of power squeezed out of their bikes.

This is the HT coil we supplied, its a high output CDi type thats around half the weight (and size) of the Rotax one yet it gives bigger sparks. (We recommend the Rotax one for road bikes and only mildly tuned machines as it fits with no issues with wiring - this part doesn't fit straight on and the wiring is wrong - so you have to work all this out yourself)

Image
0 x
www.rexs-speedshop.com
Classic Performance

User avatar
namtip
Posts: 516
Joined: Tue Aug 31, 2010 9:03 am
Location: Crawley

Re: Competition only stators

Post by namtip » Sat May 02, 2015 10:24 am

Interesting. Thanks for the explanation.
0 x

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest