1984 250r wont stay running

[seth6025]

I’m suspicious of your base gasket. It has no effect whatsoever on compression and it’s difficult to get the engine to rev up if it’s leaking. It can also cause backfiring. The proper way to test for a base gasket, leak, or any other leak on a two stroke engine is to do a pressure test.

Another person mentioned this to me too. I dont have a leakdown tester but I think I may need to purchase one

[seth6025]

I've seen a few fly wheel "rivets" come loose ( including mine) where the fly wheel is connected to hub, causing the all kinds of problems with timing. I've also had carbs that leaked around the jets and adjustment screws because of cross threading or just plain worn out, making it impossible to get the mixture right. Cracked spark plug wire shorting out to the frame at higher rpm is another.

Ok good to know. I will take a look at that as well

[Fox250R]

I know you said you cleaned the carb but did you blow out your pilot jet?

[seth6025]

I know you said you cleaned the carb but did you blow out your pilot jet?

Yes cleaned twice. Second time ran everything through ultrasonic cleaner and then blew compressed air through everything and reassembled

[ColeCoke]

I have been having the same issue with my 1984 250r, it's got good spark, fuel and air, replaced the woodruff key, and coil and spark plug, I have around 170 for compression, no smoke from base gasket, I have had the carb out and cleaned multiple times, new gas with proper mixture,checked wiring, but nothing, it ran for a 20 minute ride once after I bought it, then it just wouldn't run longer than a minute, and was hard to start, I feel lost with this thing, any help???