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Moto Mind
Moto Mind is a technical blog written by Paul Olesen who is a powertrain engineer working in the motorcycle industry. The blog covers a wide variety of topics relating to two and four stroke engine performance, design, and optimization.



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Do You Know The Importance of Tightening Techniques?

Posted by Paul Olesen , November 05, 2016 - * * * * * · 4,736 views

Do You Know The Importance of Tightening Techniques? I hope you’re all enjoying the fall weather. For those of you in northern states, I hope that you’re getting in some end of season riding. This month I want to touch on bolted joints and the importance of adhering to tightening techniques outlined in your model’s service manual. How A Clamped Joint Works
I’m going to discuss the importance of criss-...


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Do You Know How To Properly Inspect a Clutch?

Posted by Paul Olesen , September 29, 2016 - - - - - - · 7,329 views

Do You Know How To Properly Inspect a Clutch? Having a clutch that works correctly is key to being able transfer all the power your engine produces to the rear wheel (or wheels if you're a quad guy/gal). In this post I want to share some key clutch inspection techniques I use and recommend to help ensure your clutch works as it should. These tips are presented in a step by step format and are taken r...


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Is A Piston Upgrade Right For You and Your Four-Stroke?

Posted by Paul Olesen , August 11, 2016 - * * * * * · 6,867 views

Is A Piston Upgrade Right For You and Your Four-Stroke? This month I wanted to share an exert from the Race and Performance Engine Building chapter in my book, The Four Stroke Dirt Bike Engine Building Handbook. If you've been wondering how high compression pistons work and if they are right for your application, read on! Piston upgrades are normally considered when changing the compression ratio is desir...


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What you really need to know about air filter maintenance

Posted by Paul Olesen , July 05, 2016 - * * * * * · 7,884 views

What you really need to know about air filter maintenance Air Filter Maintenance - What You Need To Know
In my last post I shared an account of what happens when dirt gets past the air filter and into an engine. This was a telling tale, however I want to go further and discuss key components of what can be done in terms of maintenance to limit the chances of sucking in dirt. Whether you ride a two-stroke or f...


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How Much Damage Can An Improperly Cared For Air Filter Cause?

Posted by Paul Olesen , April 28, 2016 - * * * * * · 11,792 views
Fuel & Air Air Filters, Chemical Filter Cleaner & Oil
How Much Damage Can An Improperly Cared For Air Filter Cause? I thought this week it would be a good idea to share with you an example of what can happen when dirt gets passed an engine's air filter. This will be a short post, but a picture is worth a thousand words. In my next post I’ll go into detail on how to properly care for your air filter to help ensure that this never happens to you. The series of photo...


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How Do You Keep Track of Where Bolts Go During a Rebuild?

Posted by Paul Olesen , March 30, 2016 - * * * * * · 6,329 views

How Do You Keep Track of Where Bolts Go During a Rebuild? Alright guys, this week I just want to share a short and simple tip with you on how to stay more organized during an engine build. 
When it comes to major engine maintenance or repairs, usually the engine covers have to come off or the crankcases must be split. The covers and cases are almost always retained using different length bolts. The repercus...


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What Changes In Valve Shim Size Can Tell You About Your Engine

Posted by Paul Olesen , February 26, 2016 - * * * * * · 9,217 views

What Changes In Valve Shim Size Can Tell You About Your Engine I hope you enjoyed my last post on ice tire studding! The season in my neck of the woods has been a bit short this year and I may be getting back to the dirt sooner rather than later. Nonetheless, Part II, which covers mounting ice tires is now up on my blog. You can view it here: Ice tire mounting . 
In today's post I'm going to shift focus back to...


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Motorcycle Ice Tire Studding - Part One

Posted by Paul Olesen , January 28, 2016 - * * * * * · 4,028 views

Motorcycle Ice Tire Studding - Part One Happy belated New Year's! I hope the holidays were good to you and that you're looking forward to a new season of two wheeled excitement. I know I am and I'm excited to get back to work on this blog. In today’s post I’m going to get into the details related to tire studding with the help of an industry expert. To help bring you the best information I...


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The Top 6 Characteristics You Need To Have To Rebuild An Engine

Posted by Paul Olesen , November 28, 2015 - - - - - - · 6,039 views

The Top 6 Characteristics You Need To Have To Rebuild An Engine I hope you’re all having a good fall and are getting excited for the holidays. It snowed for the first time this year here in Wisconsin and I’m getting eager for the lakes to freeze over so I can get out and ride the ice. I need to set aside a good 7 hours to stud my tires and set up my bike before that can happen though! Today I want to talk about s...


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How Does Octane Rating Affect Your Fuel?

Posted by Paul Olesen , November 06, 2015 - * * * * - · 2,917 views

How Does Octane Rating Affect Your Fuel? Octane Ratings
In my last post I shared a tip I like to use when filling up fuel cans at the gas station. I also presented an example detailing how mixing two different fuels with different octane ratings affects the blended fuel's octane rating. Out of that post some comments were left regarding the necessity of running specific octane fuels. Today, I...






About Paul Olesen

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