running to lean maybe. I would think that taking out the spark arrester would have an effect on backpressure. Try a throttle chop test and see if you are rich or lean. Then try adjust air fuel mixture to compensate.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
Honda Foreman Forums
Honda Foreman Forums: Discuss the latest Honda Foreman in our free Honda Foreman forums. Also talk about Honda's other ATV and UTV's including the Honda Rubicon, Honda Rincon, Honda Rancher and Honda Recon