Friday, 17 October 2014

Yamaha YZF R125 Air Valve Mod

Yamaha YZF R125 Blog Index - Contents







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Yamaha YZF R125 Air Valve Mod  




this is the panel that you will need to remove, i have the crash bungs so theres one different tool bit for that, if you havent got them, get some 

Yamaha YZF R125 Air Valve Mod

these are the tool bits i used and the position as to where to use them are on the first picture, for those with out the crash bungs i believe that the bolt in its place is a H4, so the H6 will not be needed.

Yamaha YZF R125 Air Valve Mod



once the panel is removed this is what it should look like, the black thing where the pipe comes from is a one way valve that stops the exhaust gases from going back into the air box. the pipe coming out of it should go to the exhaust. you can block it form either end of the pipe but i decided to do it at the exhaust end as the pipe is easier to remove that end 

Yamaha YZF R125 Air Valve Mod

this is what it looks like connected to the exhaust and where i shall block the hose

Yamaha YZF R125 Air Valve Mod

only cost me £1.49 from ebay at the time or anything else that can block it but not melt at this end of the pipe, the pipe has a 10mm internal hole nut the lip on this cap makes it about 12mm which ensures a tighter fit and full blockage but is still remove able if needed on a later date.

Yamaha YZF R125 Air Valve Mod
Yamaha YZF R125 Air Valve Mod
Yamaha YZF R125 Air Valve Mod
Yamaha YZF R125 Air Valve Mod
Yamaha YZF R125 Air Valve Mod



the previous 5 images are pretty self-explanatory and involve basically forcing the 'bung' into position and replacing the pipe. replace the side panel and make sure the bolts are tight enough, i lost a bolt because yamaha forgot to tighten them properly in the past 

and that is it your done, its not a massive difference but i have noticed it. will not harm any part off your engine or exhaust, just give you a little extra kick out of you Yzf-R125.






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Yamaha YZF R125 Air Valve Mod


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