I bought this 1988 LT250R about a month ago. I have the receipts where the motor has just been rebuilt. I cleaned the carb. , put new Mossbager reeds in it, and a new jet. It had a 280 jet in it and I put a 250 in it and it ran a lil better so I put a 220 in it and it still runs like poop. It spits and sputters and backfires. Please HELP. I cant figure this thing out.

 

I think your timing is off..........

later
Superstar

 

How do I adjust my timing?

 

How does the plug look.
Make sure your coil is good. If you have a manual, it shows howe to test it.
Are the jets clean.
Does it idle good.
Does it crap out at 1/4, 1/2 or full throttle, or always

 

Check the air mixture screw, that could be off. Try a 240 jet in and have your air mixture screw 1 1/2 turns out. That is what the clymer manuel says

 

your in luck, i just recently had that problem!!!!! When ever it started, it backfired and sputtered, and eventually died. So i had the help of my dad and we took off the carb. Use carb cleaner, NOT brake cleaner, carb cleaner has oil in it!! So we cleaned it and took out the jets, cleaned the needle in the seet very carefully. We put it back on and screwed up my throttle cable. It still didn't start. So we took it to my suzuki dealership and had them fix it. We just had the regular check up. I still got the ticket, they did the following-Put a new NGK spark plug, gear oil, fixed throttle and got my quad runnin all for a low price for 175.36. I think the only problem was the spark plug, and we didn't claen the carb good enough.

So just go and put a new spark plug, clean your carb very carfully, and throughly and it should run. good luck!!!

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86 lt250r
answer exhaust
works performance front and rear nitros shocks
Renthal chain and sprockets
Boyesen power reeds

 

175 for 6$ worth of gear oil and 2$ plug , people really need to learn how to work on their own atv's.

 

175...you could of done the work your self and put the money towards somthing like a fmf fatty or a powercore....

 

Thats a low price?......anyways sorry Stunter it could be one the possibilities that one of us said, your just gonna hafta try them one at a time.....I would do the timing after ya try the carb. cleaning/adjustments. Try what hondaguy1 said.....

later
Superstar