Need Jeting Help

[350x 250r]

:D i just got all my new parts in. and i need a good place to start with jeting.its a 85 atc 250r.new parts a pt hi rev pipe and silencer/38mm air striker/k&n/boysen reeds. any help would be great

[350x 250r]

i read the 101jeting. was a very good page but i have no idea what to start with

[tyman]

read the jetting thread.. its really helpful..


edit: yeah what they said... haha i always open all the new threads at one time, and this was one of the last... good luck with jetting.. its simpler than it would seem...

[Dammit!]

Any port work? Airbox lid on or off?

[350x 250r]

no porting yet .air box lid a hole cut out of it but not too big

[350x 250r]

i read it im just looking for a good place to start

[Dammit!]

When in doubt, go big. You won't hurt it by starting out way too rich. I would think with the mods you listed you'll end up in the 150's. Just be prepared to do some plug chops and WOT runs until you get it right. Get a jet tool too. You can change the main jet without moving the carb that way (although getting them in can still be a PITA, sometimes you have to loosen the carb up a little and just twist it to get a better angle).

I have basically the same mods as you but with some good port work and I run a 178 main, 52 pilot. I forget where my clip is. Another member I ride with though has the same exact mods including port work and he runs a 145 main so you just never know until you get in there and do it.

[Rustytinhorn]

This is for a stock '86 250r flatslide keilhin carb.

[350x 250r]

ok i gess ill start with a 170 main and a 52 pilot only because thats what came in the 38mm air striker. i dont know what ill do for the clip position????:wondering :wondering im not to good at jeting this is my first
2 stroke jeting is still a littel scary for me:confused:

[Liquid-Darkness]

http://www.3wheelerworldforums.com/showthread.php?t=55086

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Jetting.

[ceaserthethird]

Glad you posted here , www.E2S.com is nice for quad's ... you will get alot of help here ...

Keep us posted

[350x 250r]

nice to see you again thanks for your help with the plug it worked out good. i got a ? for u. i am thinking of making rollers 4 the rear wheels of my r.so that i can simulate normal riding. so the i can get the trike jetted.i want to do all my plug chops on the roller because i am only able to ride on on the weekends and will take me a wile to get it jeted and if i can do it in my back yard i will beable to cut the jetting time in half. my ? is do u thing i will get an acrate plug chop off the rollers? :confused: :confused:

[Rustytinhorn]

It would probably work to a certain extent. I dont know if you would be able to reach WOT with no resistance on the bike it would rev up extremely fast. If you could add resistance to the back tires it would probabily be better, even if its just holding the brake. Just a thought.

[Fox250R]

:D i just got all my new parts in. and i need a good place to start with jeting.its a 85 atc 250r.new parts a pt hi rev pipe and silencer/38mm air striker/k&n/boysen reeds. any help would be great
sounds like we run the same setup pretty much..I run a 172 with a 52 pilot.. seems a little rich at times but runs great and not much smoke..