big red carb

[ac10]

85 Big Red 250 does the choke plunger control air or fuel.....seems to me that the small shaft at the end of plunger is just a guide........since Iam having a cold start issue researched this problem........the starting jet is a 2 step design..large end is 2mm and the small end is .8mm. Someone said to try drilling the jet larger so drilled to .9mm. There was small improvement but cant seem to get the fast idle....carb is clean..Thanks for any info...

[dougspcs]

When the plunger raises it allows fuel to pour directly into the carb Venturi.

So to directly answer the question it controls fuel.

There is an old Honda service bulletin about drilling out the jet where the needle seats to correct cold start issues.

[Flyingw]

Everything you need to know about the cold start mod is in my tutorial. http://www.3wheelerworld.com/showthr...54#post1257154

[ironchop]

Awesome tutorial! That needs stickied somewhere convenient.

Sent from my Z998 using Tapatalk

[ac10]

ok thanks so it is fuel

[ac10]

thanks...great info