Topic: CB500 main jet size

[rtbmrgl]

Hello, my 1973 cb500 with stock exhaust and air filter box.
The main jets in them now are 86, the book says the stock jet is 100. Does this sound right.
 Doesnt seem rich but I havent done a full throttle, kill the engine and pull the plugs test.
Was wondering what others have as far as main jets

[jonda500]

Mine are #105 (stock exhaust and filter). Unless you have restricted the air intake, (like european models with #78's where the air has to get through a little snorkel) I don't know how you can ride it with #86 main jets - I didn't even know you could get #86, the sizes are normally 95,98,100,105,110. How did you determine that you have #86's?
John

[rtbmrgl]

Thanks for reply, I have the carbs off, a slow jet is plugged. I dont ride often, I removed to clean and inspect.

[Moosey]

I was having problems with my bike not idling at all. It would just die at idle. (Previous owner had "rebuild" the carbs) I pulled the carbs to check the floats and discovered that he had put in 86 main jets and aftermarket slow jets. I installed 100 main jets and original keihin slow jets. The bike runs like a top now.

[rtbmrgl]

I just bought a set of Keihin  #40 slow jets, I do have the original #100 mains, ill put them in a see how it runs.

[Deltarider]

98 reads 86 when held upside down  Just my 2 cnts.

[DaveBarbier]

98 reads 86 when held upside down  Just my 2 cnts.

HAHA

[rtbmrgl]

s.o.b., got me , its 98, 
like to old saying goes, two keyboards are better than one,
 im also on access-norton fourm and they too have sharp eyes.

thanks again.

[BomberMann650]

98 reads 86 when held upside down  Just my 2 cnts.

HAHA

Told ya dave was born on the half minute!

[DaveBarbier]

98 reads 86 when held upside down  Just my 2 cnts.

HAHA

Told ya dave was born on the half minute!

I really want Delta to be right. Reminds me of that Cheers episode with the raffle/lottery.

[rtbmrgl]

98 reads 86 when held upside down  Just my 2 cnts.

HAHA

Told ya dave was born on the half minute!

I really want Delta to be right. Reminds me of that Cheers episode with the raffle/lottery.

Ok for everyone a round of beers, Im drinking Newcastle brown ale.............

[BomberMann650]

98 reads 86 when held upside down  Just my 2 cnts.

HAHA

Told ya dave was born on the half minute!

I really want Delta to be right. Reminds me of that Cheers episode with the raffle/lottery.

Oh damn I read the layout wrong, Dave, you an delta both are clever devils