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Title: Questions, 75 250??
Post by: Rocket on June 20, 2004, 10:44:38 PM

I have a 75 250 that I am figuring on riding at the SDRR and I am curious what the stock gearing was and stock jetting. I want a baseline to start with. I can't find anything in the manual for either of my questions. What are you guys running on yours?
thanks
Rocket

Title: Questions, 75 250??
Post by: firstturn on June 20, 2004, 11:11:02 PM

Rocket,
I don't have the settings information with me, but Thomas may be able to help you. I sent him a carburetor that worked on his 250. If you don't get it by next weekend I will look it up.

Ron Carbaugh

Title: Questions, 75 250??
Post by: tmc3c on June 21, 2004, 07:47:28 AM

Hey Rocket, Here is what Kent Knudson said in a past Keeping Track on a stock 36mm Bing {2/36/102} 160 main jet, #283 needle jet, and a #35 pilot jet, and a #1 {281} jet needle with the clip in the middle. They are running avgas and a NGKb8hvx gapped at .024.... I also have a technical data sheet that says: on the 54/36/102 carb that to use 165-170 main jet, a 322 needle jet, 50 idling jet,2nd from the top needle position. pilot air screw open 1 1/2 turn,throttle valve 230.................. I hope this helps!!sorry it got here late but I am just coming in off a 12 hr shift and got them all week!!

Thomas Carmichael

Title: Questions, 75 250??
Post by: DKWRACER on June 21, 2004, 07:03:31 PM

Rod, at 5280 altitude Bing 36 mm:
Slide=220/230
Main 152 to 165
pilot=35
needle jet=276
As you can see the altitude effect
Hope this helps, Tom.......

Title: Questions, 75 250??
Post by: rob w on June 21, 2004, 11:41:37 PM

Hi Rocket, The stock gearing on a '75 250 was, 13-52.

Bob

Title: Questions, 75 250??
Post by: Rocket on June 22, 2004, 07:27:25 AM

Thanks for the info. Appreciate the help.
CU @ Mid-Ohio!!
Rod

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General Discussion => Penton Talk => Topic started by: Rocket on June 20, 2004, 10:44:38 PM