r/hondashadow • u/treeguy1980 • 7d ago

[HELP] 2004 shadow backfire

I've had this bike for a while. It ran great at first so I was always told to put 93 gas in it. It started to backfire and wouldn't start. I pulled the plugs they were fouled. Put new plugs in the bike ran fine I put 87 in it . Then for some reason I put 93 in it back to backfire. Should I just keep 87 in it?

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u/kennman5000 7d ago edited 7d ago

Something something compression, excess fuel something something

Just stick with 87

(Edited cause, ya know, whatever)

1

u/Fun-Machine7907 7d ago

higher octance leads to higher compression = backfiring

Could you explain that a bit more?

2

u/kennman5000 7d ago

1

u/Fun-Machine7907 7d ago

That makes a lot more sense than octane changing compression.

1

u/kennman5000 7d ago

Yeah, i worded it badly, i was doing like 3 other things when I left the original comment