Help with jetting on 86 Lt250rg

[FatMcNasty]

I have a 86 lt250rg which im in the process of rebuilding(basket case). According to the factory manual. I should use the following.
Needle 6fp55-3
Needle Jet q-3
Pilot 45
Main 210
Air Screw 1.25 turns
the carb is the stock 34mm flatslide mikuni

Here is the problem. It came with a DG pipe, Stock Silencer, and K&N filter with NO airbox, and boysen reeds.
I know from my 4 stroke days that this would be too lean a set up. What would be a good baseline?

[Bandit]

put it togeather and make a run on a fresh plug, then check the plug, then richen it up acording to how the plug looks which you already know its going to be lean so it wouldnt hurt to go ahead and get some bigger jets

[370banshee]

ok first off scrap the DG pipe. if you have to get a stock pipe it's probably better. DG products suck balls. period. anyway take your stock setting and jump the main up i'd say bout 3 jet sizes then use taht as a baseline for you main the pilot and needle setting your gonna have to figure out your self. if youi buy a differnet pipe you can just call the manufactureer and they will give you a base line on the mians and pilot and needle settings for a stock quad with the pipe. then just jump the main up a couple sizes and use taht as your base line. i don't see and open element filter messing with your needle or pilots that much so put them where the pipe manufacturer says to put em.

[Bansheebite77]

Your best bet would probably go one size up on your pilot, and go 4 sizes up on your main jet, warm up the bike put in a new set of plugs, make a full throttle pass through all gears kill the engine and then read the plugs.
Check out www.dfn.com/benkaren/, go to jetting FAQ, this page is FULL of great info (its ment for banshees but the basics are all the same) while your there read up on the "plug chop" this is how you'll get your jetting perfect.
Good luck!

[FatMcNasty]

I did get a chance to run it last weekend. Before discovering the cracked swing arm.

What I currently have in is:
240 main
35 pilot
needle is second clip from top.

.5 to WOT is dark coffee brown (rich)
idle is wet black (holly cow rich)
idle to .5 is varing from wet black to just black (rich)

also it a bear to start hot or cold.

What gets me is the pilot is 2 sizes smaller than factory and stilll rich.
And every thing I have read states the main comes into play in the .5-WOT position.

And yes DG sucks! After killing 2 mufflers on my 86 ATC200x I relized this.

[370banshee]

LRD makes LT250R's do great things look into a LRD pipe. also i think suzuki_LT250R was think bout selling his CT pipe ask him bout that.

[FatMcNasty]

Originally Posted by 370banshee

LRD makes LT250R's do great things look into a LRD pipe. also i think suzuki_LT250R was think bout selling his CT pipe ask him bout that.

How good will they work with the stock silencers? On the Oregon Dunes there is a 93 db limit(damn hippies). Not many aftermarket silencers can do that level. So im kinda stuck.

[370banshee]

we've got the same stupid Db rule here but i think ours is 92Db. on our little dunes. anyway i'm not sure i'm guessing that if you jet down for the silencer you'd be ok. that or maybe you could pick up a pro circuit "factory sound" silencer or i think FMF make a quieter silencer now too.

[Bandit]

i guess i am lucky... there is NO db limit in my town or in any of the sand pits i rode in in other towns the only place there is one is on the mx tracks and its like 103db's i think

[370banshee]

well our little dunes are still pretty big area i just sau=y littel dunes because where i ride is bout 500 acres. think bout this glamis is bout 60,000 acres i think and before all teh clouses it was someting like 180,000 acres at laeast thas what the maps say when they close a 49,000 acres it doesn't look like much on the maps