Yamaha YZF R125 Forums banner
1 - 13 of 13 Posts

·
Premium Member
Joined
·
5,218 Posts
Discussion Starter · #1 ·
Originally by Aaron_R125:

First of all, make sure you know how to take your fairings off and put them back on again. You'll pretty much need to dis-assemble the entire right side of the bike. But you can cut some corners here and there with that - you decide.

You will require:
A Hex-headed Screwdriver or Allen Key.
Phillips Head Screwdriver
Ratchet + Extension
13mm Socket
12mm Socket
Any other tools dependant no the system you are installing; i'd recommend having a 12mm and 13mm spanner to hand.

Note below. Two 12mm nuts on the header - remove to free the collar and the header. Remove the air valve clip and pipe from the exhaust header pipe. You'll see I don't have one in my picture because i removed it and blanked it off with a bolt and jubilee clip.



Note below. One 13mm nut on the black bracket connecting to the exhaust hanger. Remove.



Note below. One 12mm nut on the hanger. Remove.



Well done. You've now removed the standard exhaust system - be careful, it weighs 5.8kg's don't you know. Fitting is the same as reverse...

Note below. Fit header and collar to engine and place nuts on. Don't tighten them up yet. Leave it with some play in it.



Note below. Fit cone(with the mounting bracket attached) onto pipe and mount the 12mm bolt through the hanger. You should get a nut, maybe a 12mm one, to secure on the rear. Tighten the clamp at the cone's end to the pipe. The mounting bracket should be on the swing-arm side of the hanger - not as pictured.



Adjust the cone's position on the hanger so that it looks straight and flush and then tighten up the header, and then the hanger mount.


Job is done. Stand back and fire her up.
Tightening torque for the exhaust system is 20Nm (exhaust studs, the hanger bolt underneath, and the footpeg bolt), so a nice easy one, set once and click away.
 

·
Registered
Joined
·
94 Posts
have you ever encountered power loss ive changed my exhaust and it struggles near 60 mph ive just got a k & n filter and see if that makes any difference
 

·
Premium Member
Joined
·
2,207 Posts
have you ever encountered power loss ive changed my exhaust and it struggles near 60 mph ive just got a k & n filter and see if that makes any difference
What exhaust are you running?
With some of them, it's quite common that changing the exhaust will make the bike run too lean, and so it loses power. If that's so, you need to get your local garage to correct the fuelling. The K&N filter will have the same effect
 

·
Premium Member
Joined
·
2,207 Posts
Do you ride with baffle in or out, and does it improve performance with the baffle in?
I'm going to call it now and say it's likely fuelling is out, but could potentially be something else
 

·
Registered
Joined
·
94 Posts
ive got the baffle out tried with the baffle in and no change well me dad is taking it to the dealer while im away at a festival to get the master cylinder changed fpr my front break gonna ask them to see if they can sort out the fueling :)
 

·
Premium Member
Joined
·
2,207 Posts
and whats that youve done to the air pipe to the exhaust just out of curiosity mate
That's the air bung mod, the bike's got a little valve and hose that injects fresh air out of the intake into the exhaust to improve emissions a little. We all used to bung it up in the belief that you got more power and throttle response. The theory behind it is solid, but the bike's such a small engine you don't really notice anything, so it's debatable.
 

·
Registered
Joined
·
94 Posts
no way lol well cheers for your input mate ive been scratching my head a bit with this and hopefully it wont cost me anything to sort the air and fuel change 1st time ive properly spent money on a bike my 1st bike i had was a honda veradero :p
 
1 - 13 of 13 Posts
Top