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Rear cylinder not firing

Just picked up a 1987 Suzuki intruder 1400. The rear cylinder doesn’t fire unless you put your hand over the airbox. then it begins to rev extremely high. What’s the problem? Vacuum or air mixture?




I think you may have a plugged rear carb. You may need to rebuild it. When you put your hand over the airbox your fattening up the mixture. I would change the fuel filter and rebuild the carbs. take a look at this site for pictures and parts location.

Thanks Scruffy!

I've had the unfortunate experience of rebuilding both carbs a few times due to a deteriorating fuel tank. You may want to check your fuel tank to see if there is anything funky going on there too. I threw in an in line fuel filter and it's worked magic.

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