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Discussion Starter · #1 ·
Dear N300 fanactics,

Is it me or the N300 is very easy to vapor lock?

Let me explain... while the bike stays in the hot sunny day,,, after a few day I need to prime the fuel pump many times until the bike starts.

At first, I thought it was the gas tank had vacuum (fuel cooled down after few hot days) so I open the gas cap before starting. Still takes 1-2 minutes of cranking to get it started.

If I use the bike every day or two it's start right away. But when the tank is starting to purge (hissing) in the sun, I get hard start after 2-3 days of sitting.

It doesn't do it if I don't leave the bike in the sun.

I am thinking the vapor lock is happening in the hose feeding the injectors.

Battery is new and charged.

N300 MY 2017 4k miles

Premium Member
84' Goldwing Aspencade, 91' EX500, 98' Ninja 250 w/ 17' 300 engine, 07 EX500
224 Posts
Sounds like you've already found the issue.

Invest in a cheap cover, like a half one. The advantage of a half cover is you can put it on while the bike is hot, at least I'm my case.

Tire Wheel Automotive tire Motor vehicle Vehicle

I got both of mine from Oxford

Oxford - Umbratex Motorcycle Cover https://a.co/d/fH5u8AA
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