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Good and reliable engine tuning does not only require high quality components that "fit" together. Also you should have the nowledge to make sure the requested components does not have a negative effect on each other. Also a perfect setting of the injection and ignition maps is the key for a good, healthy and long lasting engine. Also a good engine tuning always mean to make sure the customer gets exact the engine for his / her needs. It makes no sense to build up a "Super-Moto engine" for a cross-country bike.
It doesn' matter if you only want to get a bit more torque or if you want to have a complete overhauled engine - we are always the right contact for your plan!

In general: The engine of the 660 XT is not made to give you very high power in highest revs. The strengths of this engine are the lower and the middle rev range. And this is the range that should be optimized and upgraded with torque and power. Of course, you will also get more power in the top range. We make sure you get a very good, linear torque curve, so you have much more power from bottom range on.

Our tuning kits does not ghet the last bit out of the engine - as this make no sense for daily use. So it is guaranteed that you still have a very long lifetime of the engine. You should keep in mind that, depending on the compression, we recommend to use premium-grade fuel (98 octan). During the years we found out that the below  shown tuning steps are often the best choice and are a good otion. Of course it is possible to updrade and mix this - also more options are avaiable on request.
The shown kits does not shown the highest possible enginge output! If you have special needs - sent us an inquiry. Changes in the  ECU, changed injection and ignition, different piston stroke, crank shaft modifications, new piston rods... Everything is possible.
We offer single components or complete power packages in different steps. All packages are based on our almost 25 years of Yamaha single cylinder tuning. The perfect choice for your demand!
For further information give us a call: +49-221-7680560

Following three tuning examples. As you can see, there are no "exact" parts in the lists as there are a lot of things that influence the price (e.g. year of the bike). So it is hard to give any price information without knowing any further details of your bike, we do not have any "price list" of this sample tuning stages. Also there are much more tuning options avaiable, feel free to ask us.
 

Sample 1 Sample 2 Sample 3
  • aftermarket 2in2 exhaust
  • OTR racing headpipe
  • Power Commander V
  • DNA Racing stage 2 cover
  • DNA air filter
  • OTR Racing camshaft
  • Cylinder head modification
  • up to ~60 hp

 

 

 

  • aftermarket 2in2 exhaust
  • OTR racing headpipe
  • Power Commander V
  • DNA Racing stage 2 cover
  • DNA air filter
  • OTR Racing camshaft
  • 104 mm Big Bore Kit
  • Cylinder head modification
  • up to ~63 hp

 

 

  • aftermarket 2in2 exhaust
  • OTR racing headpipe
  • Power Commander V
  • Changed ECU setting
  • DNA Racing air box cover
  • DNA air filter
  • Modified air box
  • OTR Racing camshaft
  • 104 mm Big Bore Kit
  • Cylinder head modification
  • Valves +1mm or +2mm
  • OTR throttle body modification
  • up to ~67 hp

 

 


"Cubic inch capacity is replaceable with nothing but more cubic inch capacity" This is an old saying, but it's message is still ...
from 299,95 €
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High quality manufactured oil bypass valves (thermostats) from JAGG. An oil thermostat in combination with an efficient oil cooler has ...
89,95 € *
Racing Forging Piston, lighter than stock, but much more reliable and solid. The piston is milled from the high grade aluminium with premium ...
269,95 €
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Cylinder head porting for Yamaha XT660. To rise the power of a bike due to a good cylinder head porting ist truly one of the best options ...
from 399,95 €
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Racing Camshaft by OTR special made for the Yamaha XT-660! You can expect more power and an improved torque. Appr. 5 PS and 4 Nm torque are ...
from 189,95 €
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Modified pin of the decompression mechanism. To be used with our racing camshaft XT-660.  
23,95 € *
Ready for shipping in 2 - 3 Days
High quality intake and outlet valves for the water-cooled 660 engines from 2004 and newer in oem size. Made in Europe to high quality ...
from 16,95 €
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All offered stainless steel valves are impregnated by a special German process to .002” deep with a .0002” surface build-up to ...
43,95 €
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The concept is simple; the more you flow, the more you go. The better you can move air and fuel through the motor, the more power you will ...
249,95 € *
Ready for shipping in 2 - 3 Days
Due to different environment protection laws the Yamaha XT-660 models unfortunatelly are delivered with some electronic restrictions. What ...
from 199,95 €
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Dynojet Power Commander Map selection switch with included bracket. Connecting the map selection switch allows the rider to switch between ...
56,95 € *
Ready for shipping in 1 - 3 Day
The O2-Optimizer is mounted between the stock lambda sensor and the stock wiring by using the stock plugs With the O2 optimizer the ...
109,95 € *
Ready for shipping in 2 - 3 Days
Power Commander V Injection module for the Yamaha XT-660R/X 2004-2006 The Power Commander V fuel tuner optimizes your ride anywhere ...
from 339,95 €
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Power Commander V Injection module with O2 Optimizer for the Yamaha XT-660R/X 2007 - 2016 The Power Commander V fuel tuner optimizes ...
from 359,95 €
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Avaiable for the Power Commander V is the add-on Auto Tune module which allows for live, closed loop EFI tuning. Based closely on ...
309,95 € *
Ready for shipping in 2 - 3 Days
DNA Stage 2 high flow racing airbox cover with an integrated airfilter in the cover. This cover gives the XT 660 engine the air it ...
49,95 € *
Ready for shipping in 1 - 2 Day
DNA High Flow air filter for all Yamaha XT-660R and XT660X from 2004 onwards. The exchange airfilters simply replace the standard ...
49,95 € *
Ready for shipping in 1 - 2 Day
High quality manufactured oil bypass valves (thermostats) from JAGG. An oil thermostat in combination with an efficient oil cooler has ...
109,95 € *
Billet aluminium oil cooler for the Yamaha XT660R and XTX-660 models 2004 and onwards. The newer 660 often run with a normal oil ...
179,95 €
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A good oil temperature is one of the vital factors for the endurance of a big single cylinder engine. Especially in the warm up phase the ...
62,95 € *
Ready for shipping in 2 - 3 Days
The secret of the new NGK Iridum IX spark plug is the laser-welded electrode made of Iridium. Thanks to her "minimal" diameter of only 0,6mm ...
16,95 € *
Ready for shipping in 1 Day
NGK offer high qulaity spark plugs for the XT660 model range. NGK standard plugs are constructed for longer life and optimum performance. ...
8,95 € *
Ready for shipping in 2 - 3 Days
Nology High Power Ignition Cable Yamaha XT660 The XT-660 models innately does not have the strongest ignition spark - the combustion ...
74,95 €
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Driving the XT660s without this anoying and maddening plopping and banging when closing throttle?  Closing the AGR system with a blanket ...
13,95 € *
Ready for shipping in 1 - 2 Day