THE WAY TO GET BETTER PERFORMANCE

97 Yamaha SR 125 discussion forum:


THE WAY TO GET BETTER PERFORMANCE

THE WAY TO GET BETTER PERFORMANCE 
///MoePower said 2008-01-07 04:15 
 
These are some advises from me to you about what you can do to make it´s performance better.
First of all you can bore 8 holes in the exhaust around he original one, in same size as the original one.
Then you removes the plastic cap on the right side of the air-filter box completely and also remove the filter (except from the one in aluminium).

Those two things make a wonderful sound of the bike.

BUT: if you ONLY do that your performance will be weaker, if you do not do the next step witch is:

Adjusting a screw under the carburetor a little bit out, so that the air/fuel mixture becomes better.
You only need to adjust it around a quarter or a half turn out.
Tune the screw over and over again until you find the point where the bike/engine work finest.

Out from these modifications you will not raise the top speed with more than maybe a 5km/h, but the the acceleration will raise a bit and you get more torque at lower RPM´s to!



If this is not enough you guys can try change to a 28 or 30mm carburettor, this will give you even better acceleration, maybe a little higher top speed to.


Personally I have tried all these modifications except from changing the carburettor to 28 or 30mm, and I sure feel differences.

I have tried a 37mm carburettor together with the other modifications and the torque at low RPM´s raised a lot together with the sound that was totally great!
But I will say that the 37mm carburettor was way to big.
It works fine for accelerations up to half of the RPM´s, but past that it did not work very well at all..
Actually you get more acceleration with a 37mm, but you loose a lot of top speed, thats because its way to big as I said.
But I think a 28 or a 30mm will be perfect for this bike, im about to try that on my own!

Originally the carburettor is 24mm on these bikes, as I think is to small after all.


Sorry because of my bad English, but at least I have try to explain how to make these bikes work better.
I have personally tried all those things with my own bike, and thats where I have got´n all the tricks from.

Good luck people. :) 
 
<<Previous          Answer          Discussion overview          Report spam          Next>>

Comments, questions and answersEnter a comment or answer to this message

You can post your question, answer or comment as a guest. Or enter your e-mail to join the forum and get notifcations of new messages.

 
Title 		 
Signature
Optional e-mail
Enter your e-mail to join the forum and get notification of answers and new messages. You can unsubscribe with a single click. Bikez does not display, sell or misuse e-mail addresses.
Message text

Describe technical issues in detail to get quality answers. You can offer or request second-hand parts and equipment as a privat person. Bikez reserves the right to remove any improper or commercial content.
Accept that we store and display the message.  

 

More 1997 Yamaha SR 125 information

Our discussion forums are intended for short messages. We also welcome more extensive motorcycle reviews.

Bikez also recommends that you check out the technical data and the riders' rating for the 97 Yamaha SR 125. You can also rate it yourself. Use our efficient motorcycle classifieds to sell or buy this bike. Your motorbike gets a high quality presentation. Ads are free.