Author Topic: Jetting for cold weather  (Read 1196 times)

Rj1

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Jetting for cold weather
« on: November 28, 2015, 11:55:44 AM »
My wife bought me a fl350 about 5 months ago  so I would not sit around the house . I was wounded about 2 years ago  and I used to love working on things before  and the odyssey are great because I have trouble using  my  legs and the hand controls  are perfect . Did not do much work on 2 strok engines so most of it is new to me even bought my son a fl250 to have some one to ride with and to work on them with its hard for me to get to some of the places on it but to the point when I first rode the 350 it ran great  now that it dropped in temp I noticed a drop in power so I took the carb off to clean and check the jet sizes the pilot is a 45, main was  130  and the clip on the needl was in the 1st grove the top  air screw was a littel more then 2 turns out  that seems way to lean . I got from a man in south Caroline so I figured he had it set up for the summers there but way to lean for Pennsylvania winters  I don't know what the pipes are but there not stock  put a new uni air filter in kept the pilot the same 45 moved the main up to a 142 air screw to 11/2 turns out moved the clip to 3rd grove on needl . Now when I ride it it idels good  wide open good it's the middle seems like Iam not getting power should I move clip down  our go bigger on main I've done a compression  check 130 and leak test holds 6lb for almost 9 min I would like to get it set up to ride in the snow when we get it . Temp between 25 &45 degrees altitude about 750 from sea level .thanks for any help this forum is great I've learned a lot from it I think I read all the post more then once seem like every problem I've had been written about .

hoodlum

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Re: Jetting for cold weather
« Reply #1 on: December 02, 2015, 02:45:35 PM »
1st to 3rd on the needle is a big jump... That controls the middle range.. I would move to the 2nd notch and see what happens... If it's rich, there should be a drop in rpm's along with some sputtering and sloppy throttle response...

LiveWire

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Re: Jetting for cold weather
« Reply #2 on: January 04, 2016, 12:43:09 PM »
The air bleed primarily affects idle to 1/4 throttle, same as the pilot jet. The 45 pilot is a suggestion I make to people over the stock 52. 2 turns out on the air bleed was probably fine. I agree with Hoodlum that 2 notches is a big jump on the needle.

What oil mixture are you running? Less oil means the mix is thinner so more fuel will flow through a given jet size. If running like 50:1, I could see needing that lean of a jetting setup.