Unfortunately I didn't get to mess with it today. Actually spent the day riding 4-wheeelers with the kids. Will probably give the neighbors the next two days off since it's Christmas Eve and Day - the FMF is loud as ****. Makes the boat sound like a Prius!

Jetting is essentially stock. I recall putting them in that either the pilot or main jet was richened up "2". I think I need to go back and play with the needle. Again, it was adjusted off the middle position and now I can't recall if I left it like that or returned it to the middle clip position.

Also - anyone see anything in this chart that doesn't make sense?

https://www.fixyourdirtbike.com/fix/...e-carb-tuning/

seemse like Ike a nice guide for the newbie.....


Somewhat of a new hobby for us so we are feeling it out. Naturally my 4 and 6 year olds love it.

Or throw something like an optak (egt) on it and take all of the guess work out of it.

Clip was curiously up a notch from stock (needle down) which doesn't make sense to me since it has an aftermarket FMF pipe on it. I figured it would need to be richened up a little given the hopefully better flow of an aftermarket pipe....

ill probably try try it Saturday since the weather was way colder here than I would ever run the bike in.

That carb also has a Power Jet. Its an electric solenoid that opens up between 1/4 and 3/4 throttle for more mid-range pull. I cant say that i ever had one go bad but it's something else to check. Unfortunately, i don't remember if the PJ solenoids are normally open or closed. If its stuck open the bike would run rich from idle all the way up but if its stuck closed or the passage is blocked, the bike will have a big lean spot in the mid throttle region. I used to race a 96, 97, and 98 RM250 before switching to Hondas and KTMs. In 2000 Suzuki finally figured out their porting, that bike should rip.

on a PJ? isnt a pj just a basic oval slide?? (ive been out of bikes since 05) though I liked pwk's over the pj's

Yes, it has an enrichment solenoid that operates from 3000-8000 rpm if I remember correctly. I didnt test it, but if this doesn't work maybe I'll pull that off and check it. I think it's an easy on/off 12v

Once upon a time long long ago a CZ taught me how to ride 2 strokes. Moved to Spanish stuff later, OSSA. The lurking monster was MAICO.

Did the piston have numbers on it/was it bored? Was it ported? So many things could have been done to a 18 year old bike.

If you really think its missing check the gap on the mag/flywheel.

New piston. Bone stock, put in the proper way with the arrow facing the exhaust port.

I miss my two strokes. I loved my big bore ktm 550 until it bucked me about 5 times climbing a hill one saturday and I had to get a more tame 380.