Sign Up!
Login
Welcome to Motorcycle Thailand
Sunday, August 17 2014 @ 09:10 PM ICT
 Forum Index >  General Discussion >  Motorcycle Mods and Maintenance New Topic Post Reply
 Does the 2010 Yamaha Spark135i have intake and exhaust restrictors ???
   |  Printable Version
By: Matty (offline)  Sunday, December 19 2010 @ 05:35 PM ICT (Read 4600 times)  
Matty

I know that in countrys with strict emmission/pollution laws, manufacturers of carburetted motorbikes often use restrictors in the intake manifold and exhaust manifold to enable the bikes to pass emission laws. Once these restrictors are removed the engine performance increases greatly as the bikes can now breath easier.

Does anybody know if the new fuel injected Yamaha Spark 135i has these restrictors and if so are they easy to remove ???
Any advice appreciated.
Thanks Matt...

Forum Regular Member
Regular Member


Group Comfort
Level:
: +2

Registered: 07/13/08
Posts: 88

Profile Email    
  Quote
By: ThaiDesign (offline)  Tuesday, December 21 2010 @ 10:44 AM ICT  
ThaiDesign

Quote by: Matty

I know that in countrys with strict emmission/pollution laws, manufacturers of carburetted motorbikes often use restrictors in the intake manifold and exhaust manifold to enable the bikes to pass emission laws. Once these restrictors are removed the engine performance increases greatly as the bikes can now breath easier.

Does anybody know if the new fuel injected Yamaha Spark 135i has these restrictors and if so are they easy to remove ???
Any advice appreciated.
Thanks Matt...



He Matty,

You can relatively easy enhance the performance of your Yamaha Spark 135i by modifying the airbox and go for a sport exhaust pipe. With the exhaust pipe make sure that it doesn't make to much sound...

Of course if you want more you can go for a more aggressive camshaft... but that will likely mean that in the lower rpm's you will have less power...

Forum Active Member
Active Member

Group Comfort
Level:
: +26

Registered: 09/21/07
Posts: 275

Profile Email    
  Quote
By: Matty (offline)  Tuesday, December 21 2010 @ 10:52 AM ICT  
Matty

Thanks for the info, i have looked on some manufacturers websites for a sports exhaust pipe for my bike without much luck,
can you reccomend a brand and if possible a supplier where i can purchase one ???
thanks
Matt..

Forum Regular Member
Regular Member


Group Comfort
Level:
: +2

Registered: 07/13/08
Posts: 88

Profile Email    
  Quote
By: Richard (offline)  Wednesday, December 22 2010 @ 09:24 AM ICT  
Richard

Yes, you're right, the Yamaha Spark 135i is not easy to find performance parts. I once saw a guy who had a Yamaha Spark 135i with a Honda CBR150R sport exhaust muffler attached to it... He told me that the exhaust pipe was custom made from stainless steel.

It looked impressive and the sound was surely amazing...

Forum Active Member
Active Member

Group Comfort
Level:
: +10

Registered: 10/01/07
Posts: 236

Profile Email    
  Quote
By: Matty (offline)  Wednesday, December 22 2010 @ 02:09 PM ICT  
Matty

I dont want to fit an after market exhaust pipe can to my bike unless it is manufactured to fit my model.
i have seen on Utube some Spark 135i using Yoshimura pipes. looked on yoshi website but dont see my bike listed.
Somebody must know where i can find a good exhaust or know someone who does know.
please help...

Forum Regular Member
Regular Member


Group Comfort
Level:
: +2

Registered: 07/13/08
Posts: 88

Profile Email    
  Quote
By: Richard (offline)  Wednesday, December 22 2010 @ 02:39 PM ICT  
Richard

Quote by: Matty

I dont want to fit an after market exhaust pipe can to my bike unless it is manufactured to fit my model.
i have seen on Utube some Spark 135i using Yoshimura pipes. looked on yoshi website but dont see my bike listed.
Somebody must know where i can find a good exhaust or know someone who does know.
please help...



You probably right about not using just any exhaust pipe. For Yoshimura, did you contacted the Thai distributor/representative of Yoshimura in Thailand?

Real Moto Sports
372 Ramkamhang 146,
Sapansoong,
BANGKOK 10240

Sorry have no email or telephone number...

Also keep in mind that the Yoshimura pipe you saw could be fake...

Forum Active Member
Active Member

Group Comfort
Level:
: +10

Registered: 10/01/07
Posts: 236

Profile Email    
  Quote
By: Anonymous: Mick ()  Saturday, January 01 2011 @ 05:32 PM ICT  
Anonymous: Mick

G'day! I own a 2007 Yamaha Spark and I also would like to find out if my model has intake and exhaust restrictors? What mods help with the airbox? Different filter or modify the airbox unit? Have seen loads of performance parts for the bike but unable to contact via e-mail given in another forum.....anyone stock off the shelf performance parts for this bike? Thankyou!


       
  Quote
By: Anonymous: Bob ()  Wednesday, January 05 2011 @ 06:59 AM ICT  
Anonymous: Bob

Quote by: Mick

G'day! I own a 2007 Yamaha Spark and I also would like to find out if my model has intake and exhaust restrictors? What mods help with the airbox? Different filter or modify the airbox unit? Have seen loads of performance parts for the bike but unable to contact via e-mail given in another forum.....anyone stock off the shelf performance parts for this bike? Thankyou!

Through each of the little rectangular holes on the "dress plate" on the back of the stock muffler, carefully drill a tiny pilot hole only 1/16" deep into the back round face of the muffler. You will find your drill hits an internal plate that 1/16" in----- DO NOT PENETRATE THAT NEXT BAFFLE!!! Then drill out the holes to 7/32". This will leave the rectangular holes intact on the back dress plate. The sound is quite soft at 40 in third gear. When you get on it, it is quite louder and sounds quite fine. You can cover the main exhaust hole with your thumb and romp it with no pressure felt on your thumb. The new small holes let all gases out fine. So between the two you have half the restriction. Grind or cut the four plastic rivets that hold on the perforated screen inside the air filter element and get rid of the screen. Take off the rubber air "snorkle" that goes into the air box. This was to soften the sound of the intake pulses. Install an Irridium plug. One more tooth on the rear sprocket. This will gear it down minutely, but you will go faster because it was geared taking gas milage into account at the factory, and not looking for top end. You will feel the difference. If you want to go beyond this, buy a new bike, unless you just need a hobby. Happy trails! : )


       
  Quote
By: Anonymous: Mick ()  Thursday, January 06 2011 @ 11:25 AM ICT  
Anonymous: Mick

Thanks! Will do as suggested. Have already changed rear sprocket which made very slight difference. Cheers!


       
  Quote
New Topic Post Reply


 All times are ICT. The time is now 09:10 pm.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content 

Advertising


Poll

How many times have you crashed your motorcycle in the last three years?

  •  Never
  •  Once
  •  Twice
  •  Three times
  •  Four times
  •  Five times
  •  More than 6 times
  •  More than 10 times
This poll has 0 more questions.
Results
Other polls | 3,363 votes | 13 comments

TMEA MEMBER

Thai Motorcycle Enterprise Association

Events

There are no upcoming events

Motorcycle Thailand on Facebook

Motorcycle Thailand on Facebook

My Account





Sign up as a New User
Lost your password?