two questions about this engine?? First where is the o-ring located on the idle screw if there is one, slightly melted my carb with a heat gun at the head of the idle screw just a bit. (kicked my own A__ after this). Second question all i have in my pit box are odonnell plugs 97t and 77t, the hobby shop was out today and i'm racing this weekend and i have got to choose between the two odonnell plugs, anyone know which would work the best.. thanks in advance....

Both plugs are too hot. The 97t is cooler. See if you can buy a P5 at the track. A P4 will get you by.

EB 2041=Good choice....I got 10min. easy w/8mm carb restrictor @ 236!

Now Travis, we're talking on the racetrack, not the alley in Lightstreet, LOL!

Now hambone....I work too many hrs. to enjoy my rc at any given time thru the weekdays...unlike the some fortunate folks!...Plus, if i remember correctly it was you out there playing around

I went to a parking lot to get some basic tune and got into strange problems.

Idle is OK, acceleration is great but engine started to stall after like 1second on full throttle like it is very lean on the top. started to richen it up a bit and ended up with HSN one full turn from flush. with this engine seems ok.
LSN is at stock setting, idle is just a bit more open. (1/8 turn)

this is quite strange setting as my previous engine was like one turn in from flush (half turn from stock setting)

is it normal?

I have same setup as before. 30% OD, P5, 9901 pipe (I wasn't able to tune it with 2041)

I finally got a chance to run my full mod. It still had a ton of pinch, I heated with a heat gun and it started easily. I idled a tank through it and then tried to get some idea of where the tune was. I chased it around for a little bit but finally got it squared away. The LS was pretty close out of the box but the HS was too rich. I got it dialed in pretty good now. I ended up idling two tanks and then babied one on the track. This motor is awesome! It is so good in my truggy, it's super effective from bottom to top. I am not sure where the top is yet, it's just really fast. It ran beautifully after I spent a little time working it in. Run time seemed pretty good for such an unused motor. I can't wait to race with it this Sunday.

JP SENT YA A EMAIL

Anybody know if the Eb mods head button for the Ninja with work on these engines?

i dont think so but il b seeing edd today so il ask him

becoming very frustrated with js motors. i have a race prep that will not hold a consistant tune. i had a full mod that the silicone came out of the crank. had my supplier send it back in to be re-worked and we were told they would be overnighted to us last thurs. so we would have them back in time for our first summer points race. i have yet to see my motor back. before the silicone came out, i was pleased with the full mod, but i believe the race prep will be going on ebay. after the full mod is used up,( when ever i get it back) i am going back to my old engine manufacturer. having the motor pre-broke in is great, but it is not worth the head aches i have had.

I used 10 min pit stop to win the A today in buggy w/ race prep

we just were not able to tune the engine during weekend race. it was working great but after few laps it started to stall again after a second and WOT on a straight. it did not do it in every lap. strange. we went back to stock carb settings but no luck. something must be terribly wrong.

I am gonna try carb from the dead engine that worked great before the snapped conrod thanks to a rock accident.

tom great race yesterday i was running right behind ya till i came in for a fuel kurt put my lid downt a little to fast and made me flame out o well lol. my truggy I pushed to 12 mins till my pit stop and i prob could have did another lap but o well still came up victorius with it..

kinda sound like it was fat up top making it load up a little to much on the streight then when you leave off it couldnt burn the fuel fast enough.