VFR backfiring

tatters · Exxon Valdez Joined: 05 Jan 2004 Karma :

just carried out a service on my VFR400 nc24 (oil/filter change, new plugs, air filter) and the bike keeps back firing now and again after use of the throttle sounds like its coming from the direction of the collector box which is brand new had a look at the box and there is a small amount of blowing comming from it could this be the cause Question

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Past:NRG50,AF1125(x2),NSR125RR,ZZR250,CX500,VFR400,KR1S,ZZR600(x2),CB400N,YZF1000(x2),KH125,Z200,FX400R,CBR954RR(x2)GPZ500S,GT550,VFR750F(x2),RD350N,XR650R,CBR600F,CB250,KDX250,YZF750R,CRM250,400EXC,KLR650,TTR600RE,DR350S,R100GSPD,RGV250,VMAX1200,DL650 Present:G650XC,C12,KZ750,1190ADV

ts50x0 · Spanner Monkey Joined: 16 May 2004 Karma :

Sounds like the cause ot me. If it cant be sorted id take it back(if its as new as you say it should not happen). Get a new one or a refund.
Good luck

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

Some burbling on the overrun is normal. Well it is for NC30s, my NC24 only did it on bad days.

The collector box. It costs 300 or 400 quid, if you can find one. Its the bit to watch out for when buying a VFR.

Try and get an exhaust bandage around it.