Still Can't Get Your 4-Stroke to Start, Idle, or Run Right?
Stop guessing what to check next—even if you've already cleaned the carb or changed jets.
Find the most likely causes of your problem with my 60-Second Troubleshooting Checklist, then use the step-by-step videos to help get your bike running right.
60-day money-back guarantee
Tired of Trying One Fix After Another?
Does any of this sound familiar?
- You've cleaned or rebuilt the carb, but your bike still runs poorly.
- You've adjusted the fuel screw or changed jets without fixing the symptom.
- Your 4-stroke bogs, sputters, stalls, or is difficult to start.
- You've watched multiple troubleshooting videos but still aren't sure what to try next.
- You're worried about making the problem worse—or wasting more money on parts you don't need.
The frustrating part isn't just that your bike won't run right. It's not knowing WHY.
And when you're not sure what's causing the problem, every adjustment can feel like another guess.
That's why I created 4-Stroke Jetting Made Easy.
Instead of randomly changing jets or replacing parts, you'll have a practical way to narrow down the possible causes and work toward a solution.
Know What to Check First With My 60-Second Troubleshooting Checklist
Your dirt bike is trying to tell you what's wrong. You just need to know where to look.
My printable troubleshooting checklist helps you investigate common rich and lean running symptoms without immediately assuming you need different jets.
You'll find:
- Common symptoms such as bogging, sputtering, hard starting, and inconsistent idling.
- Possible causes involving fuel delivery, carb tuning, spark, electrical components, intake, exhaust, and more.
- A practical order for checking potential causes, starting with the simplest before moving on to more involved repairs.
- A convenient reference you can view on your phone or download and print for your garage.
You don't have to watch the entire course to get started.
The checklist is available near the beginning of 4SJME Gold, so you can start investigating your biggest problem right away.
And when you need more guidance, the Gold program includes step-by-step tuning videos and troubleshooting resources to help you understand what to do next.
From Not Starting to 1–2 Kicks
Alan tried changing jets using the factory service manual, but his son's CRF150R ended up refusing to start.
After using my jetting guide, he reported that the bike started in just 1–2 kicks and ran smoothly throughout the throttle range.
That's the difference between guessing at adjustments and understanding what your bike needs.
The last attempt at a jet change we followed an OEM shop manual, this was before I found you on YouTube. The result of that jet change attempt resulted in a "no start" situation after kicking it for several minutes. Since using your jetting guide, my son's CRF150R is running perfectly! Now it starts with 1 to 2 kicks and has smooth power throughout the entire throttle range! We really appreciate you helping out the MX community.
-Alan Davis (TX)
Two Ways to Get Your 4-Stroke Running Better
Option 1: Solve Your Biggest Problem First
If you just want to get your bike running right, start with the 60-Second Troubleshooting Checklist.
Find the symptom you're experiencing, review the possible causes, and work through the checks in a sensible order.
Use the included troubleshooting resources and videos whenever you need more explanation.
Option 2: Learn the Complete Carb-Tuning Process
Want to understand how everything works so you can confidently tune your carb and diagnose future problems?
Follow the complete step-by-step video training to learn how to recognize symptoms, understand the different carb circuits, make adjustments, and evaluate the results.
Either way, the goal is the same: less guessing, less frustration, and more time riding.
Why I Created 4-Stroke Jetting Made Easy
I wasn't always comfortable working on dirt bike carburetors.
When I first started learning about jetting, I read forums and watched videos, but I still wasn't confident about what to adjust or where to start.
That changed during a 10-day trail riding trip to Colorado in 2015.
I brought my XR200R from Minnesota, where I was used to riding at much lower elevations. But up in the Rocky Mountains, at 8,000–12,000 feet, my bike didn't want to start.
I knew the elevation was affecting how it ran, but I had to figure out what changes it actually needed.
Once I got it running properly, I was hooked.
I started learning everything I could about diagnosing symptoms and tuning carburetors to get smooth, predictable throttle response.
Because there's one thing I can't stand: a dirt bike that doesn't run right.
Hard starting, bogging, stalling, and unpredictable power take the fun out of riding. And when you're helping newer riders, smooth, predictable throttle response is especially important.
That's why I created 4-Stroke Jetting Made Easy.
I want to help you figure out what's actually causing your problem, stop wasting time guessing, and get back to enjoying your dirt bike.
Howard's KTM 525 now "starts easier" after learning how to adjust his carb!
“I am trying to diagnose a starting issue with a 2007 Polaris Outlaw 525 (same engine/carb as KTM 525). It also has a problem sometime of a hanging idle and erratic throttle control. With your guide, I believe I either have a partial plug in the idle circuit or I need to go up one size with the pilot jet. Very good guide! After adjusting the carb, I find that it starts easier.”
-Howard Koehn, New Mexico
My bike had a "hanging throttle" symptom. This guide helped my find the jet circuit issue to fix it.
-Curtis Denenny
Glen solved his DRZ400 "Popping on decel" problem!
Frequently Asked Questions
I've already cleaned my carb or changed jets. Will this still help?
Yes, that's actually one of the reasons I created this training.
A dirty carb or incorrect jetting isn't always the cause of a running problem. Sometimes it's the float level, an air leak, an accelerator pump issue, or even something outside the carburetor.
The troubleshooting checklist helps you narrow down the possible causes so you're not just repeating adjustments that haven't worked.
Do I have to watch the entire course before I can fix my problem?
No!
If you just want to solve your biggest problem, you can start with the 60-Second Troubleshooting Checklist near the beginning of the program.
Find your symptom, see what to check, and use the relevant videos or instructions when you need more guidance.
If you want to learn the complete carb-tuning process, that training is included too.
What if I'm a beginner and don't know much about carburetors?
That's exactly who I designed this training for.
You don't need to be an experienced mechanic. You'll need basic hand tools and a willingness to follow the instructions, but I'll help you understand what you're checking and why.
The goal is to make troubleshooting less confusing, not more complicated.
Will this work on my 4-stroke dirt bike?
If your bike has a conventional carburetor, this training can help you understand its fuel circuits and troubleshoot common running problems.
It covers common Keihin and Mikuni carburetor designs, including those found on bikes such as the CRF230F, TTR125, WR250F, YZ450F, DR-Z400, and many others.
Some adjustments and components differ between carburetor models, so the exact procedure may vary.
This program is not designed for fuel-injected bikes.
What if I've already watched a bunch of YouTube videos?
Then you probably know how frustrating it can be to hear five different possible fixes for the same symptom.
The difference here is having the troubleshooting checklist and training together, so you can work through likely causes in a more organized way instead of jumping between unrelated videos.
What if my problem isn't caused by the carburetor?
That's possible, and it's important to recognize it before spending more money on jets or carb parts.
The checklist includes potential causes involving fuel delivery, intake leaks, ignition, electrical components, compression, and other mechanical problems.
It can help you identify what deserves further investigation, although some repairs may require additional service information, tools, or professional assistance.
What if the training doesn't help me?
You can try it risk-free.
If you don't find the training helpful, request a refund within 60 days of purchase and I'll give you your money back.
Try It Risk-Free — 60-Day Money-Back Guarantee
Get instant access and start troubleshooting your biggest problem.
If you don't find the training helpful, simply request a full refund within 60 days. No hassle.
You have nothing to lose by giving it a try.
Everything You Need to Start Troubleshooting Your 4-Stroke
4-Stroke Jetting Made Easy — Gold
- 60-Second Carb Troubleshooting Checklist — find your symptom and possible causes.
- Symptom-specific troubleshooting resources — focus on your biggest problem first.
- Complete step-by-step 4-stroke carb-tuning video training.
- Downloadable PDF jetting guide.
- Personal jetting chart to record your settings.
- Carb cleaning and rebuilding tutorial.
- Lifetime access to the training and included resources.
Protected by my 60-day money-back guarantee.