Need help with Intruder 800

I recently bought a 95 Intruder 800 and notice that it starts great and runs well for the first 1-2 miles before losing power and backfiring at the lowest ends of 1-3 gear. The backfiring is through the exhaust and it runs fine again once I power through the low speed. I have already had the Carbs cleaned and rebuilt and have changed both air cleaners and cleaned the fuel filter and tank. Still, the same problem.

I am thinking that maybe the valves need adjusting or that the fuel pump is going bad.

Can anyone give me some advice on what to check?

Thanks for your help.

On May 15, 4:22�pm, menohm <n....DeleteThis@000.com> wrote:
> I recently bought a 95 Intruder 800 and notice that it starts great
> and runs well for the first 1-2 miles before losing power and
> backfiring at the lowest ends of 1-3 gear. �The backfiring is through
> the exhaust and it runs fine again once I power through the low speed.

Open up your idle mixture screws 1/4 to 1/2 turn to get rid of the
deceleration backfiring.

The idle mixture screws are located on the underside of the
carburetor, forward of the float bowls.

They are concealed behind EPA anti-tamper plugs which can be removed
by carefully drilling a
pilot hole, threading a small sheetmetal screw into the plug, and
pulling it out with a pair of pliers.

The anti-tamper plugs are very thin aluminum, so a heavy hand on your
drill can cause it to break through the top of the plug and hit the
idle mixture screw itself.

The first time I drilled out anti-tamper plugs, I wrapped masking tape
around a small drill and twisted it with my fingers.