250r carb...??

[thomasbynum]

Before ya'll call me names for being stooopid... i'm new to 2-stroke atv's... :wondering

Just rebuilt the top end on my '84 250r.
Went with a .75mm over weisco piston.
It had been run with an incorrect gas/ oil mix before i got it. Not pretty.

I put it all together & it cranked on the 2nd kick.
I was riding around my yard in 3rd gear at half throttle, to get it up to operating temp for the first part of the break-in. It ran fine for a few minutes, & then died, felt like you hit the kill switch.
I haven't had the carb apart, so i'm assuming it has trash in a jet or something.

I'm looking at a replacement carb that's the same size, but has the 'power jet'.
Will this work okay? How do i need to jet it, compared to the old carb without the power jet? Is a 30mm carb big enough for an air-cooled 250 with a slight overbore?

Here's a link, & thanks for any advice...
http://dratv.com/allchrome30mm.html

[thomasbynum]

Also, it is still firing & has good compression. Thats why i'm assuming its the carb.

[jeffatc250r]

Are you sure its the carb? Did you check the plug? Is the plug wet from fuel or is it dry?

[thomasbynum]

Plug is dry, & i put a new one in it just in case.

[Dammit!]

If the plug is dry it's just not getting gas. Could be something as stupid as a clogged petcock. Clean everything out before you go spend money you may not need to spend.

[evand]

yup. i agree, clean out the petcock and. take the carb off and give it a quick blast with some carb clean and run a new fuel filter.

no need for a new carb unless it worn or something isacually broken... unless you want more power:w00t:

[thomasbynum]

Pet cock flows fine. I actually had to put in an inline shut-off b/c the petock wouldn't shut off all the way. I also put a new filter & new fuel line on it. I took the tank off & rinsed it with clean gas/oil.

Guess i'll pull the carb off later. The carb looks like the float needle may not be sealing. It seeps out the overflow.

I thought for the money (only $70), i could buy that carb intstead of buying a kit for the old carb, which may still give me problems.