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Re-Do's Shop 397 4-Mil Engine Build

This engine is in the process of being build in our shop now.

More info and videos coming soon! 

 

For more info on this build: 

  • Watch the video. 👀 
  • Scroll down ⬇️ for the link to watch the build's whole playlist on Youtube. 
  • Keep scrolling down ⬇️ to see the build specs below the video.
EMBED VIDEO HERE (coming soon!)
EMBED PLAYLIST BUTTON HERE (coming soon!)

 

Q- Have questions about selecting parts or getting help with your build? 
A- You can call 📞📱 or message us at 541-419-6054. 

We are flexible and will work with you. We can: 

  • Help you select the parts for your DIY build and ship them to you. - OR -
  • Build your engine and ship it to you to install. - OR -
  • Complete the whole build for you and install in your Banshee.

Engine Specs

  • BUILD NAME:  Shop 397 4-Mil Engine Build
  • EXPECTED RIDING CONDITIONS:  not sure - this engine is for sale
    • Recreational dirt trail riding
    • Recreational dune & trail riding
    • High performance dune riding
  • DISPLACEMENT:  397 cc 
  • CYLINDERS:  Stock - Bored to 66 mm
  • PORTED:  Dune Port
  • PISTONS:  Wiseco 66 mm - 573 Pro-Lite Blaster
  • CYLINDER HEAD:  NOSS Cool Head
  • DOMES:  18 cc 
  • CRANKSHAFT: HotRods 58 mm long rod (4 mm over stock), trued and welded
  • COMPRESSION:   (determines fuel recommendation)
  • REEDS / CAGE:  Moto Tassinari VForce4 Reed Valve System
  • CARBS: Stock Mikuni 
  • CARB JETTING:  Start with 360 mains & 32.5 pilot. This may change.
  • NEEDLES:  5N7U needles for Stock Mikuni
  • AIR SCREW ADJUSTMENT:  3/4 turn out
  • FUEL RECOMMENDATION: Race Gas (110 Octane minimum to 116 Octane) for 150-200 psi
  • WATER PUMP IMPELLER:  Stock
  • CLUTCH: (select any that apply)
    • Replaced Clutch Fibers & Steels
  • CLUTCH SPRINGS:  3 Stock & 3 HD
  • EXHAUST:  
  • STATOR:  Stock with adjustable timing plate - or - Ricky Stator Round Plug or Ricky Stator Square Plug
  • TIMING: Set to 5 degrees advanced

 

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References:

  • We calculate engine displacement based on the bore in the engine's cylinders and the stroke length of the crankshaft. Click here for more explanation in our Banshee Engine Displacement blog article. 
  • Click here for information about Banshee engine break-in procedures. This includes our recommendations for Fuel to Oil Ratios and Selecting the Correct Fuel.

About the Authors:

This project article was written by Janel with plenty of help from Virgil. Virgil is the Banshee mechanic, and I am the website mechanic. I do own and ride a Banshee, which helps. 

The Re-Do crew hopes sharing our project info and specs may help some with their own projects, or that you find it interesting. Writing and editing these articles helps me (Janel) make better sense of the parts, fitment, and what goes with what. I want our technical info to be accurate and helpful.

Please do let us know if you like our project articles, or if you think I need to correct something. You can send an email to info@redo-parts.com - and your comments will be passed along to me. 

Thanks ~Janel 😉👌

Email to: info@redo-parts.com