Only firing on two cylinders

EvanTate · Post by **EvanTate** » Mon Jun 23, 2014 11:57 am

Yes if you have spark then the next step is to check fuel. Carbs become dirty and blocked over time even when used daily. Don't forget to check the float needle and seats too while you're at it as well as making sure they're clean. The nc24 carbs have little filters on each one, no clue about the nc30 though. Most people don't think to check these.

Post by **hunter** » Mon Jun 23, 2014 12:25 pm

Take the carbs off,
Clean the pilot jets and circuits,
Set float hight.

JamieDemos · Post by **JamieDemos** » Mon Jun 23, 2014 3:42 pm

Okay thanks I will do all the stuff mentioned... I'm at the point where I've loosened the top clamps on the rubbers that connect the carbs to the engine, but the carbs don't seem to want to come off. Do I just need to pull/wriggle them off really hard or am i missing something?

Thanks

Post by **dobbslc** » Mon Jun 23, 2014 5:11 pm

There tight! Mind your knuckles.....

JamieDemos · Post by **JamieDemos** » Mon Jun 23, 2014 5:21 pm

Okay thanks!

JamieDemos · Post by **JamieDemos** » Mon Jun 23, 2014 9:02 pm

Looks like I found where the fuel was leaking from, out of place rubber seal for the choke slide.

Post by **Neosophist** » Tue Jun 24, 2014 10:22 am

JamieDemos wrote:

Looks like I found where the fuel was leaking from, out of place rubber seal for the choke slide.

petrol shouldnt come out there, its only a dust seal not a fuel seal

JamieDemos · Post by **JamieDemos** » Tue Jun 24, 2014 11:48 am

Hmmmm okay, any other ideas where the fuel could be leaking?

JamieDemos · Post by **JamieDemos** » Tue Jun 24, 2014 3:07 pm

I haven't worked on carbs before so I just want to get everything clear before I start disassembling. The carb jetting guide in the v4 section seems to cover cleaning and checking the jets and emulsion tubes so I will follow that guide. As for the float heights, I dont have a haynes manual, are there any guides on how to do this?

JamieDemos · Post by **JamieDemos** » Tue Jun 24, 2014 3:07 pm

dobbslc wrote:There tight! Mind your knuckles.....

I may have a bruised pinky lol.

Only firing on two cylinders

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