WBR Yamaha YZ125 build

By April 15, 2021 June 7th, 2022 No Comments

We profile the bike the team built for Dylan Long to have some fun in the YZ125 cup.

Mission – build a rocket YZ125 that Dylan can have a heap of fun on and potentially win the 125 cup class at the Pro MX series. Dylan being 83kg it was important to have a strong and reliable engine. We wanted to bike to look good and go good. Below is a list of parts used, some costs involved and some reasons for the mods.

YZ125 2021 model $10,699rrp

Some of the parts used –

  • PC exhaust $459 and PC ti carbon muffler $549 RV spec (limited run PC did of RV spec pipes)
  • GYTR cylinder head and insert $800 (change the squish and volume also helps cooling)
  • GYTR ignition cover $350
  • DRC blue radiator hoses $95 (stronger than OEM)
  • V force 4 reeds $299 (better throttle response)
  • Zeta case saver $39 (clears mud from front sprocket better)
  • GET CDI ignition $680 (tunable ignition curve and map switch)
  • Pro Filter air filter $32
  • Dunlop tyres
  • MX Ink custom graphics $169
  • Strike seat cover $110
  • DID 520 race chain $149
  • JT sprocket 13, 50 gearing
  • Heavy duty clutch spring
  • GYTR jetting kit
  • DRC high pressure radiator cap
  • Still to add to the bike GYTR clutch cover (on back order)

Other work performed to bike that we have not listed costs –

  • 74 works coatings – Frame, engine brackets all powder coated in an awesome custom colour (contact 74 works for details and prices)
  • 74 works ceramic coated engine covers, water pump cover, blasted and cleared subframe
  • Engine built in house at WBR, crank removed and trued perfect, cases matched to the cylinder, cylinder ported, carb tuned on the in house dyno
  • Stock suspension with re spring and re valved, we used Q springs front and rear

Estimated retail cost of build $17699 which includes an estimated $7000 in parts and labour