mt07 derestrict engine

The Yamaha MT07 is a very popular motorcycle in all around the world including Australia. It comes in two main versions:

  • The Lams Learner approved MT07
  • Yamaha MT07HO also called the High output model.

In this post, we will look into how to derestrict a Yamaha MT07 LA version to give it full power.

If you are a learner you have to use LAMS-approved motorcycles. This restricts the power to your motorcycle. This is a great idea as learners riders may not be aware of the full power a 700cc motorcycle can deliver.

The problem arises when you advance to a full license you can then progress to unrestricted motorcycles. You can ride any motorcycle ever made.

Some people tend to derestrict their LAMS approved motorcycles. This can be for various reasons eg a race/track motorcycle.

Note: If you are on a Learner license you must not derestrict your motorcycle. It could be against the law, void your insurance and void your warranty. Any performance changes should be reported to your local DMV or local Motor vehicle registration department.

What restrictions does the Yamaha MT07Lams have?

The MT07LAMS has the following power restrictions inplace for the MT07

Completing these DIY mods will make the Yamaha MT-07 LAMS derestrict easy and can be done in a few hours.


MT-07
 Lams throttle plate

Mt-07 lams throttle plate
MT07LA Throttle stop

In the reduced power MT07LA, it has a throttle plate that restricts the open position of the throttle body cable.

This is a simple mechanical stop that restricts the fully open position of the throttle.

MT-07 throttle restrictor
Cut off the MT07 throttle plate restrictor.

To be able to open the throttle body full you either have to cut off the throttle restrictor tab or buy an unrestricted throttle bracket.

Unrestricted MT07 throttle plate

The above image is my unrestricted MT07 throttle plate. This will give you an idea on how much you need to cut off. Start small and work your way up taking small cuts.

MT-07 throttle restrictor plate

The only issue is that if you cut off too much of the original throttle restriction tab the internal butterfly valve can actually open more than 90 deg. This will start to close off and restrict airflow again.

The easy way is to just buy a new unrestricted throttle plate. This will be a simple bolt-on solution. or use a Yamaha Bluetooth OBD2 4-pin cable and module to see the actual position on your smartphone.

Congratulations the throttle plate restrictor is now gone.

Mt07 high flow air filter upgrade.

MT07 FZ07 air filter mod upgrade

Both the Yamaha MT07LA and the high output (HO) version have an air filter that restricts airflow. You will get a large increase in power by converting over to a high-flow air filter.

This is where you will have to start taking some panels off your motorcycle to get to the air filter.

Hordpower airbox is a very popular mod to increase airflow to your engine. I will deliver a good overall spread of power with sweet gains past 6000 rpm and no low power loss in the lower rev range. You should be able to get an extra 4-6HP just with this mod alone.

A slightly cheaper airbox is the DNA filter and cover option. It is a straight bolt-on solution that is well worth it.

You can check out our post on the DIY Yamaha MT07 air filter mod for free power here.

Airbox to manifold restriction

Yamaha MT-07 LAMS Derestrict airbox more power

This is another mechanical restriction specific to the MT07LAMS. You will need to replace the rubber manifold tubes with the high output version.

To derestrict the MT07 or FZ07 airbox you will need to pull out the whole box to be able to remove the rubber air manifold tubes. These manifolds may be glued in so you will need a knife to cut around the edges.

Yamaha MT-07 LAMS Derestrict airbox

If you are handy with a sharp knife you could try to cut out the smaller internal rubber restriction baffles. Depending on your model you can buy the unrestricted MT07 manifold parts from Amazon

How much extra horsepower can you get derestricting the MT-07-LAMS?

Stock Yamaha MT07LA claimed maximum power: 52.1hp (38.3kW) at 8000rpm. Claimed maximum torque: 57.5Nm at 4000rpm

A stock unrestricted Yamaha MT07HO is 55 kW (73.8 hp; 74.8 PS) @ 9,000 rpm 49.85 kW (66.8 hp; 67.8 PS) @ 9,200 rpm (rear wheel)

So you should be able to get around an extra 21hp or 10kw by derestricting the MT07LA .

For even more horsepower upgrade the stock exhaust to an Akrapovic Ti underbody exhaust that increases sound and performance.

The power to weight ratio is also very important. So if you can reduce the weight of your motorcycle then you will have more acceleration and top speed. Check out my Yamaha MT-07 weight reduction project parts list.


Lams FAQ

What does LAMS mean?

LAMS means a learner approved motorcycle, the motorcycle must meet all of the following criteria:

  • Must be a motorcycle on the approved list of motorcycles by notice in the Government Gazette.
  • Needs to have a power-to-weight ratio of 150 kilowatts per tonne or less
  • Have an engine capacity of 660 ml or less.
  • Be the standard model and variant as specified on the approved list.
  • Not have been modified in any way that increases its power-to-weight ratio.

The last dot point is why if you are a learner rider you must not derestrict your Yamaha MT-07 lams for extra horsepower.

Full list of LAMS approved motorcycles in Australia

Here is the current list of Lams approved motorcycles in Australia

Conclusion

As I already purchased the MT07HO model I only have had to do the airbox mod and install an Akropovic Ti exhaust. This combination has been great to increase the power and sound.

You can see this post for my full list of my MT-07 performance mods.

I left the baffle in on the exhaust as it already sounds great. No need to wake the neighbors. Who knows what will happen in the future when I feel the need for speed.

So if you are after more power from your Yamaha MT-07 LAMS Derestrict it. It will wake it up and be a real monster. As always we take no responsibility for the information provided here. DIY at your own risk. Ride safe guys.

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