[woodcote]

The first class I'm suggesting is the very simple and accessible Micro Scalextric Street Stock...

   

Here are some regs...

Class 1: Micro Scalextric Street Stock

• Chassis: Micro Scalextric 1995-2018 version with braids. May be ‘narrow’ or ‘wide’ versions, depending on body fitted. No cutting, drilling or any other modification to chassis. Components cannot be glued.
  
• Motor: Unmodified standard Micro Scalextric motor with ‘flywheel’ between commutator and armature stacks. Minimum 6 ohm armature (no low-ohm 'My First Scalextric' battery set cars). Original resistors and capacitor must remain fitted between pick-ups and motor.
  
• Traction magnets: Two original Micro Scalextric magnets in original position, flush with bottom of chassis. Orientation may be changed (magnets can be flipped).
  
• Braid plate and guide: Any 1995-2018 Micro Scalextric braid plate with either plastic guide flag or metal pin.
  
• Braids: Any braids – steel, copper or plated. Must not be soldered to chassis components.
  
• Axles, wheels & gears: Standard Micro Scalextric front axle and wheels. Standard Micro Scalextric rear axle, wheels and Micro Scalextric 7T pinion + Micro Scalextric 25T crown gear.
  
• Tyres: Any single compound tyre. Maximum diameter on wheel is 0.476” or 12.09mm.
  
• Body: Any Micro Scalextric closed wheel saloon or GT body – street-style or tuners liveries please. Re-paints most welcome. No cutting or sanding of wheel arches or of any other external surface.
  
• Maximum width: 35mm or 1.378”.
  
• Weight: Minimum weight of entire car 23g. Ballast may be added to body only.
  
• Wheelie bars: not permitted.
  

Here are two of the filthiest Micro Scalextric chassis I could find (I was after the bodies, no doubt)...

   

It shows the layout, the very nice and smooth gearing (older versions have black gears, newer ones are a white translucent shade), the resistors (blue, red or black coloured) and ceramic capacitor attached to the front of the motor. The armature windings have been red, gold or green. Here's a close-up of the all important 'fly-wheel' between the stacks and the commutator - something that identifies the slightly under-powered Micro can motor...

   

Not a lot you can do to the car, apart from clean it, get it running smoothly and fit it with some silicone Supertires (from SlotCarsDirect in the UK: https://www.slotcarsdirect.com/shop#!/si...ual/page/2) and probably some new braids. There are some Micro braid-tweaking tips here: http://www.whoracing.org.uk/microtuning.html

In terms of bodies, there have been some nice street cars made for Micro Scalextric, plus race and rally cars you could re-livery into a drag strip monster. Andrew put together this excellent resource so you know what you're looking for on eBay: www.microscalextric.wickedlemon.co.uk