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How can i de restrict my lexmoto xtr 125 - Motorcycles

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: de-restrict an aprilia rs 125

Hate to disagree with tina783, but you may have restrictions in place, there is two on the aprilia rs 125. if your on a L plate then the bike should be restricted to 11.5w of power, which is about 15 bhp, when it's de-restricted should be around 34bhp. First is the power valve or a RAVE Valve as some people call it, have you got one? located on the front of the cylinder body, above the exhaust. some times the body of the power valve is there, but there is a blanking plate is underneath it. If the body of the power valve is missing, then its a blanking plate. need to get a power valve and the control unit and the solenoid, fitting is easy look around the net and you'll find one. The next one is the emissions restriction, which is in place due to italy have a real hard on about thier air. The CDI at the back of the back of the bike needs to removed and then if you look at one side you will see a rubber sealant has been used to fill in one side. You need to dig that out and snap a little piece of the circuit board and then refill the hole with a rubber sealant. try to search the net for a how to do on this you need to look at the pics and see what part of the board needs snapping, don't go blindly into this other wise you will kill the CDI. the bike then will act alot more smoothly in the lower end revs.

Posted on Aug 02, 2009

  • 88 Answers

SOURCE: de-restricting aprilia rs 125 (jetting)

hi not putting you off but when i fitted a arrow exhaust system and power valve. i had great power. but i had to rebuild the engine every 800 - 1000 mls. regards

Posted on Jan 31, 2010

  • 8909 Answers

SOURCE: how do you de-restrict

It is similar to the Yamaha and Aprillia 125S.
If it has not got one fitted already, at the upper most front point of the cylinder head, there needs to be a valve fitted. This valve keeps a constant pressure on the exhaust gasses leaving the engine, two stroke engines require "back pressure" to enable the reed valves and the whole sytem to run as smooth as possible. The valve is controlled by the CPU or Engine Management Unit of your bike, which also has a built in restrictor between 2500 and 5500 revs. Depending upon the CPU used there may be a way of removing the European Restriction at those revs.
Cgheck online for that reference. Try joining a blog on your bike, there are a few about.
Hope this helped you.

Posted on Oct 20, 2010

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Since you didn't say if you have a dip stick or sight guage, or type of bike, I can only say refer to the owners manual. Some bikes need to be checked while the motor is warm and others cold. There are many different bikes that take many different amounts of oil. So the best bet is to fill to a middle level, crank it, and recheck.

Feb 15, 2014 | Motorcycles

1 Answer

Lexmoto xtr 125 runs fine, but at certain revs the cluth (?) makes a horrible screeching sound. Are there bearings in the clutch that can go. It only has 5500KM on it. Thanks

Usually there is a clutch hub bearing as well as a main transmission bearing. I would do a load test to see if the noise is only under load or not. If under load it could be either bearing but if not under load it's probably the trans bearing. But you won't actually know until it comes apart.

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de-restrict the exhaust , leave the engine alone, may cause more problems.

Mar 20, 2013 | Motorcycles

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