Honda ATV Forum banner

1992 Honda 300 spark plug reading

908 Views 9 Replies 6 Participants Last post by  SlammedRanger
Sorry if my grammar is bad, but I have a 1992 Honda 300 that I installed a thrush glass pack on yes bring the hate it was cheap.

Anyways I figured I would have to jet my carb but thought I'd check the plug first I ain't no mechanic checking the plug isn't my thing. Thought I'd ask for you opinions first, I have ran the engine for about 15 to 20 hours after putting the pipe on many heat cycles.

Quad runs good but backfires quite a bit around mid range rpms while engine braking. Although after riding for about 45 minutes and the engine is hot the back firing seems to stop so I don't know. Doesn't ever bog I mostly ride at WOT for best engine braking since it has very not existing brakes lol

I live on a farm so I do use this quad for chores and moving cattle as well so it does do alot of idling and low throttle riding. But anyways enough rambling if you could please look at my pictures and tell me your input that would be really helpful. Thanks

P.s it sounds damn good and I'd say has alittle more top end power still pops a wheelie as well

Sent from my SM-A530W using Tapatalk
See less See more
1 - 1 of 10 Posts
What brand plug ? And heat range ? The color looks a tad..... Off (light)
1 - 1 of 10 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.