DYNO QUESTIONS AND ANSWERS

Rask Cycle's
DYNO QUESTIONS AND ANSWERS

Q1	WHAT IS DYNO TUNING?
We run the motorcycle on a Dynamometer machine which measures torque and horsepower throughout the RPM range. Dyno Tuning is maximizing all aspects of the motor to achieve machine power and efficiency.

Q2	WHAT ARE THE BENEFITS?
We can tell from the graph if the motorcycle is running properly, wasting fuel, or is not up to full potential. We can pinpoint what areas are in need of adjustment then accurately make the adjustments needed

Q3	I THOUGHT IT WAS JUST FOR RACING APPLICATIONS?
It often times is, but, also serves the street rider just as well. Street riding involves a lot of mid RPM operation, drag strip operation is mostly concerned with wide open throttle (WOT) operation. Midrange problems that would make almost no difference on the strip, could make a street bike very hard to live with.

Q4	HOW SO?
Dyno Tuning will expose the problems in certain ranges of RPM operations I.E. Dead spots surges of power, weird electrical problems you will never figure out on the street. Bad drive chains, exhaust problem, over or under jetting.

Q5	SO Is It DYNO TUNING ONLY FOR PERFORMANCE?
NO, The better the motor runs, the more efficient it is. With the wild SWINGS in fuel prices, many people are turning to two-wheel transportation to save money and are often disappointed in fuel mileage of cycles. We can address this problem as well.

Q6	CAN YOU DYNO TUNE FOR GAS MILEAGE?
YES, Optimum efficiency and less negative horsepower go hand-in-hand

Q7	WHAT IS NEGATIVE HORSE POWER?
We use the Dyno to detect and measure clutch problems, misalignments, bad tires, dragging brakes and more. Negative horsepower is drive-train DRAG, Common culprits are brake/wheel misalignment problems, bad bearings, oil and transmission lubes, tires, etc. We can provide graphs showing this power-train drag. It is like a parasite pulling down the potential of the total package.

Q8	HOW INVOLVED IS THE PROCESS OF DYNO-TUNING
For $59.95 and a days notice of appointment, we can do a basic series of Dyno Runs and provide Graphs, analyze and explain them to you. Your bike may run perfect or we may spot problems and make suggestions as to fixing them.

Q9	IS THAT ALL THERE IS TO DYNO TUNING?
You decide. Often customers have been told "that's the way that model runs" or "they are all like that" by shops that don't have the equipment or knowledge to make it run better.

Q10	DO YOU THINK RASK CYCLE CAN HELP ME?
We typically see 10% improvement or better in machines that owners thought were running 100%

Q11	WHAT TYPE OF MOTORCYCLE DOES RASK CYCLE SERVICE?
All makes and models, including Japanese, sport bikes, Harley, Triumph, BSA, Norton We have had a large surge of interest recently in Japanese cycles and Japanese sport bikes. We are happy to meet the needs of these customer and word has gotten out of our abilities with the machines. Japanese cycles represent 70% of the machines on the road today. We are committed to serving them also.

Q12

I THOUGHT YOU WERE HARLEY AND BRITISH ONLY?

Not so, Many jet kits and exhaust products are available for sport bikes to increase performance, but you need Dyno runs to judge the mods.

We have on occasion seen 40-50% improvement using basic tuning techniques on bikes the owners were running that way for years, just with jets and exhaust mods and tuning- no big dollar bolt-ons!!

Q13	IS IT TRUE THAT GEESE FLY FASTER WHEN THEY FLY IN FORMATION?
YES, 30% faster

Q14

WHAT DO GEESE HAVE TO DO WITH DYNO TUNING MY BIKE?

Nothing, But, they can be compared to the concept of Dyno-tuning.

A flock of geese represents one total unit. with each goose doing its job, the formation moves 30% faster. Dyno-Tuning is a combination of many tuning operations.

Our goal is to isolate each aspect of the tuning and make it work well with all other aspects, as they are all interrelated. Carburetion too big, too small, good carb, bad carb, high flow air cleaner, etc.

Ignition Hot sparks, weak sparks, good advance curve, bad curve for compression ratio, etc.

Spark Timing Too Early, Too Late Exhaust Tuning Too restrictive, not restrictive enough, poor design that needs modification Intake System Poor design, carb to manifold needs matching, etc.

Carb Jetting Too rich, too lean (There ARE multiple circuits), accelerator Pump problems, carburetor synchronization of multiple carb bikes All these segments MUST be in sync to work up to their potential ,but increase 30% or more are possible when everything works as a team.

Remember it is the sum of small things that count. If you can't relate to the geese, then think of the different aspects of Dyno tuning as the members of a musical group and how it would sound, if all the instruments were not correctly tuned. We use the Dyno-tuning process to put every thing in order.

There is nothing on earth quite like the sound of a big inch Harley with straight pipes in perfect tune. To some if it is music!

Q15	IF I DIDN'T CARE ABUT MAX HORSEPOWER, HOW CAN THIS HELP ME, WE USUALLY DO TWO UP TOURING AT SLOW SPEEDS
WE USUALLY DO TWO UP TOURING AT SLOW SPEEDS We can tune for mid range torque, instead of horsepower, mid range is more useful for street and touring use and less money at the gas pump.

Q16

WILL YOU TUNE MY BIKE WHILE I WAIT?

NO, We will do a series of runs while you wait and go over the print out and analyze the results and suggest a course of action.

If you want to go further with it, you must leave it with us.

Just about all bikes that have a motor in decent shape will gain power and efficiency from this process, a lot of guys just want to know what their bike puts out in a quick no hassle way. $59.95 for 9 runs and print outs.

Q17	CAN I TUNE THE BIKE MYSELF AND BRING IT BACK?
Yes, simply make an appointment and we will do the basic diagnostic runs for the fee of $59.95

Q18	WHAT ABOUT THIS NEGATIVE HORSE POWER STUFF?
Your motor must over come any drag in the drive train to create speed on the road. Negative horse power slows you down, wastes gas, overworks motor and makes bike harder to push in and out of the garage.

Are you curious what you have for horsepower?

Don't understand why those new exhaust pipes, cams and/or filters aren't really increasing your performance the way you thought they would?

In less than an hour, your motorcycle can be Dyno Tested and out the door, with your print outs in hand. "Putting your motorcycle on the Dynamometer (Dyno) can give you the Baseline Stats of your bike and direct you towards needed adjustments, or at least get you headed in the right direction.

If you feel you cannot accomplish the tuning, you can always leave it for us to finish.

Our DynoJet Dynamometer is a performance diagnostic tool that is used to accurately and simultaneously measure the rear wheel horsepower, torque, speed, RPM of any motorcycle. It can accurately test from as little as 5 horsepower, and up to as high as 500 horsepower. Rask Cycle’s Dyno Service will test all motorcycles.

　Determine exactly how much horsepower and torque your motorcycle is delivering to the rear wheel, before and after the performance modifications are made.

Main Dyno Page

This info was written by Rusty Mcguire
This info is NOT to be used by anyone to benefit their business.