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Jarret's 364 Stocker Rebuild - Completed June 2026

Jarret's 364 Stocker Rebuild - Completed June 2026

This Banshee had a CATASTROPHIC engine failure. A failed connecting rod means this engine needs some major work before it’s ready to hit the dunes and trails again. The crankshaft and piston were destroyed. 

In mid-May 2026, Jarret brought this Banshee into the shop with the engine already apart - along with another Banshee. Jarret wanted engine work for both. For Jarret's main Banshee that he rides most often, he upgraded to a 4-mil stroker crank. We recycled the stock crank and Pro Design Cool Head from his 4-mil build over into this stocker engine rebuild. Jarret wanted to run race gas for both Banshees. Brand new Wiseco pistons went into this engine, and it got 18cc domes from Cameron at Redline Racing.

Almost every project has a few surprises. For this one they were:

Broken connecting rod.

Very dirty Pingel valve.

Broken front shock.

The engine went together and passed the leak down test in early June 2026. Then Virgil got to work putting the engine back in the chassis. 

Jarret picked up both Banshees from our shop in mid June 2026. He has since let us know this Banshee is running great and he is very happy. 

Watch the Build

Want to watch how this project came together?

  • 👀 Watch the video below. 
  • ⬇️Scroll down for the link to watch the project's whole playlist on Youtube. 
  • ⬇️Keep scrolling to see the Project Specs below the video.

 

Q- QUESTIONS About Your Project?
A- You can call 📞📱 or message us at 541-419-6054. 

Project Specs

  • BUILD NAME:  Jarret's 364 Stocker Engine Rebuild
  • EXPECTED RIDING CONDITIONS:  Recreational dune & trail riding
  • DISPLACEMENT:  364 cc 
  • ENGINE CASES (CASE HALVES):  Stock Cases
  • CYLINDERS:  Stock - Bored to 65.5 mm
  • PORTED:  Dune Ported by Redline Racing
  • PISTONS: Wiseco 65.5 mm - 513 Pro-Lite
  • CYLINDER HEAD: Pro Design Cool Head - This was reused from Jarret's 4-mil Banshee build.
  • DOMES:  18 cc 
  • CRANKSHAFT:  Stock Crank 54 mm, trued and welded
  • COMPRESSION:  180 psi both sides (helps determines fuel recommendation)
  • FUEL RECOMMENDATION: Race Gas (110 Octane minimum to 116 Octane) for 150-200 psi
  • TRANSMISSION:  Stock 
  • REEDS / CAGE:  Moto Tassinari VForce3 Reed Valve System
  • CARBS:  Stock Mikuni 
  • CARB JETTING: 320 mains and 32.5 pilots 
  • NEEDLES:  5N7U needles for Stock Mikuni. 
  • NEEDLE CLIP SETTING:  Center Groove on Slide Needle
  • AIR SCREW ADJUSTMENT:  3/4-1 turn out
  • WATER PUMP IMPELLER:  Stock
  • FLYWHEEL:  Stock
  • CLUTCH BASKET: Stock
  • CLUTCH: Stock Clutch
  • CLUTCH SPRINGS:  
  • CLUTCH LEVER:  Stock, or other
  • EXHAUST:  FMF Gold Series
  • STATOR:  
  • TIMING: Set to 4 degrees advanced. If detonation is detected, need to adjust timing from 4 degrees to 2 degrees advanced. 
  • GEARING: 13/43 Tooth Sprockets? - Click for Info on Banshee Sprockets and Gearing
  • TIRES: 
  • SWINGARM: Stock Length
  • SUSPENSION: 

 

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Do You Have a Project?

If you have a Banshee to restore, want to upgrade your suspension, or are planning an engine build, we're happy to help.

We specialize in Yamaha Banshees. If you have a different project in mind, contact us and we will let you know if we can take it on and what you can expect. 

CALL 📞📱 or message us at 541-419-6054. 

We offer a range of services. We can:

  1. Help you select parts for your DIY build.
  2. Help you Pack and Ship your Engine to us, build your engine, then ship it back to you to install.
  3. Complete the engine build for you and install in your Banshee.
  4. Inspect, repair and service the whole Banshee for you.
  5. Build or restore your Banshee.
  6. We may also be able to locate a local Banshee for you - then install your newly built engine in it.

Project 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. 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