DIRTY S 170cc

Thumpstar is back, fitted with a 170cc Detroit engine. The ultimate brand from back in the day is once again on point doing what it does best! Loud isn’t the word, if you are looking to stand out, the Dirty S smashes it. Everywhere you look the Thumpstar Dirty S is dripping with attention to detail & quality.

Light weight brake rotors, HSK racing callipers, forged brake & clutch levers, brake snake, rear rim lock, forged triple clamps, motocross kick start etc etc. This bike has been designed to mean business straight out of the crate and all for a very low price, as the Dirty S is only available online & direct from WPB.


TTR style plastics
Stomp Detroit 170 roller rocker high performance race engine with Mikuni 26mm carb N1234 gear box style kickstart
Chromolly double tubed cradle frame with powder coated finish
Anodised black swing arm
17/14 SDG wheels with black hubs and black rims
Rear rim lock
Thumpstar 17/14 MX tyres
USD front forks anodised gold with chromed stanchions
Forged alloy yokes with Thumpstar logo
290mm racing rear shock with 800lbs spring
Stainless steel big bore exhaust with polished race muffler
MX kick start
Black anodised alloy gear shifter
Braided brake hoses with big 1 pot race calipers
Forged alloy brake and clutch levers
KMC 420 gold chain
Reinforced poly-resin tank with black CNC alloy filler cap
High impact polymer plastics with Dirty S 3m quality graphics
Thumpstar race foot pegs
Brake snake
6061 alloy bars with powder coated finish
Thick foam bar pad with Dirty S cover
Pro Taper style grips
Two tone gripper seat with logo