Backfiring

[Eggnchips]

Ok Guys, sorry this is a bit off topic, but I have a RGV250 2 stroke road bike that I'm doing up. It was running ok'ish until I cleaned the re-oiled air filter and re-packed the tailpipe.

Now it starts ok but backfires really badly. You cannot rev it at all cos is backfires and dies.

Have I done something stupid like re-pack the tailpipe too tightly or is it something else?

 

[Studboy]

Packing the silencer too tightly would not cause the bike to backfire. Most likely you have overoiled your filter and gummed up your carbs and/or fouled your spark plug(s)? I would check your carbs out and clean them thouroughly and install fresh plugs and give it a try.

 

[TRAIL]

When I had my 2000 CR 125 it did the same thing! It turned out that my reeds were all cracked and frayed.

 

[Stew312]

Make sure the timing wasn't thrown off too, that would also cause you to not be able to rev high w/backfiring..