Back Fire

[paul69]

Hello I have a WR426F and when i ride home from work sitting on 110 Ks for a bout 2 Ks i come off the throttle and sometimes it back fires any ideas??

[Gerry B]

turn your pilot screw out about a half turn.

[paul69]

The pilot screw is out about 1 1/4 turns (the one trough the float bowl) .

would the hot weather make it do yhis its around 38C.

does turning it out richen the mixture?

[flintlock28]

SOME backfiring upon de-celeration is normal....if it back fires a lot upon de-celeration, than you are too lean.

Yes, turning the screw so that it comes out does make the bike richer, while turning it in leans it out. I highly recommend an aftermarket fuel screw like the Zip-Ty or an equivalent.

I like to adjust the fuel screw so that I get an occasional back-fire upon de-celeration; this is where it seems to run best.

[paul69]

Thanks for your help

[BergArabia]

Paul where are you in Oz? And what kind of sprocket setup and tires do you run for commuting on the WR?? Seems a different but somehow mildy appealing idea..

[paul69]

I live only 2km from work and its more or less out of my road a long straight then im at work. My bike still has the standard tyres and sprockets but i need a new rear tyre , im looking at a Metzeler ENDURO 3 SAHARA.

i live in WA oz