The Dynojet 250i dynamometer

 

We provide a full range of Dyno services to meet all customer needs and with a run and Air/Fuel print-out at just £38.00 we think you'll find our prices, as well as our customer service and satisfaction can't be beaten.

 

  
 
The Dynojet 250i dynamometer was developed for motorcycles, karts and ATVs but can take any vehicle with a rear wheel base of 56" or less.
  
 
With a set-up time of less than 5 minutes and the ability to effectively "road test" bikes in the shop, we can save an enormous amount of time, which reduces our costs and keeps your bills low.
  
 
 
 
The Dyno is not just used for performance tuning of all 2 and 4-stroke road and race engines but also as a servicing and diagnostic tool. It's regularly used to trace everyday problems such as misfires, electrical faults, carburation glitches and highlight transmission problems like clutch slip. We also use it to tune for improved power delivery or fuel economy.
  
 

read more about our Dyno

  

 

 
         
 

The Dyno is an essential part of REPS Motorcycles' high performance trade. It allows us to tune an engine to peak performance and customise power delivery to individual customer needs. By running before and after tests we can test the results of fitting new chips, different ignition maps, fuel injection maps, establish optimum gear change points, fuel starvation issues, exhaust back pressure losses, ram-air efficiency and test the results of our own in-house modifications

Using a dyno can reveal important information about how an engine is performing and display it in a meaningful format. The interpretation of that data is important (and Royston is truly remarkable at analysing the data to achieve the optimum set-up) but the key to improving performance is repeatability. To be certain that changes are working, or not, all of the Dyno runs should be as consistent as possible. Variables such as engine temperature, chain tension and temperature, even the tension of the straps securing the bike to the roller can make differences, as well as the well known differences of atmospheric pressure and air temperature.

 
 
The Dyno has its own built in software and applies industry standard correction factors to compensate for variations in atmospheric conditions. The REPS Motorcycles Dyno is in a dedicated sealed room, with forced air induction and extraction to ensure a consistent clean air flow across the air intake and radiator(s). To further reduce variation Royston positions and straps every bike on to the Dyno and performs every run himself, in exactly the same way every time.

After warming the bike to operating temperature, several back to back runs are made, including "through the gears" and 4th gear "roll on" tests. The results of all the runs are considered as a whole, not just the best or worst, the customer gets a graphical print out of each run.
Having established a base line power curve the testing of tuning parts or components can begin and by applying the same consistent and methodical approach on each run you can be sure that any changes, good or bad are real and not a one-off freak result.

  
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REPS Motorcycles - Unit 4 Ifton Industrial Park - Caldicot Road - Rogiet - Caldicot - NP26 3TF - 01291 422226