back fire wr450 08


13 replies to this topic
  • madbriuk

Posted August 12, 2009 - 04:31 AM

#1

hi lads just fitted a new leovince silencer its sound good but a bit loud and now there flames comeing out when i back off the throtal/speed,how can i sort this and is there a way to make it a bit quieta for MOT when i need to. UK.
thanks peeps

  • Krannie McKranface

Posted August 12, 2009 - 05:26 AM

#2

hi lads just fitted a new leovince silencer its sound good but a bit loud and now there flames comeing out when i back off the throtal/speed,how can i sort this and is there a way to make it a bit quieta for MOT when i need to. UK.
thanks peeps


Is it a true back fire, or just 'popping'?

  • madbriuk

Posted August 12, 2009 - 06:14 AM

#3

just 'popping' but does sound like back fire mate

  • Mtn-Track

Posted August 12, 2009 - 06:34 AM

#4

Lean it out. It's too rich....especially if you opened up the exhaust.

  • madbriuk

Posted August 12, 2009 - 06:50 AM

#5

ok how do i do that the easy way lol.
thanks

  • Mtn-Track

Posted August 12, 2009 - 10:21 AM

#6

ok how do i do that the easy way lol.
thanks


Put a kink in the fuel line.........:thumbsup:

  • Krannie McKranface

Posted August 12, 2009 - 11:30 AM

#7

No, it's not too rich, it's too lean!

You need to remove your AIS system and block it off (if it has one), change your pilot jet, and adjust your fuel screw.

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  • madbriuk

Posted August 12, 2009 - 11:32 AM

#8

do i turn it in or out and where can i get the AIS system kit from in the uk.
thanks mate

  • Krannie McKranface

Posted August 12, 2009 - 03:39 PM

#9

do i turn it in or out and where can i get the AIS system kit from in the uk.
thanks mate


First, do yourself a favor and read the stickies at the top of the forum
Next, re-jet and un-cork, and add an adjustable fuel screw
Then do a AIS block off, if you have one.

Google Search is your friend for parts in the UK.

  • KennyMc

Posted August 12, 2009 - 03:43 PM

#10

No, it's not too rich, it's too lean!

You need to remove your AIS system and block it off (if it has one), change your pilot jet, and adjust your fuel screw.


+1 Too lean of a pilot jet.

  • madbriuk

Posted August 12, 2009 - 10:51 PM

#11

ok thanks

  • madbriuk

Posted August 13, 2009 - 11:29 AM

#12

hi again lads i was told to unscrew my mixture screw a bit at a time to get rid of the poping when i let off the revs well i did and its poping more now and it don't feel as powerful, am i doing somthing wrong or have i got to keep unscrewing till the poping gosaway.
thanks

  • KennyMc

Posted August 13, 2009 - 12:55 PM

#13

I would suggest going to a 168 main jet and 48 pilot jet. Put in an adjustable fuel screw and turn it out 1 3/4 turns to start.

  • madbriuk

Posted August 13, 2009 - 01:24 PM

#14

thanks mate where can i get this in the uk




 
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