speedy100

my guess the motor was rev too high duing the break in so the rod/shaft broken, it also happens when the car is unload off the ground with high revs.

Dynamite

Yes I am from Australia

Seisick

sidewinder 20 nitro, 12 oil, i quarter open the carb, and 1 turn open from what came from factory 4th tank, running in according to instructions and clutch not tied, 180f, my fault! i donīt think so, mega tells to change the conrod after 3 hours, not 3 tanks, just spoke and the engine is on the way to serpent usa since there is warranty and they want to inspect the engine to prevent what happened to the zx21, as i recall there was an issue with the crankshafts, perhaps thereīll be another with the conrod since they appear to use same low quality material, opps I mean realistically priced material! hope not
the sirios both were from the first batch, the 3 port with the small head (bad conrod) and the 5 port with the old crankshaft (not the racing one) never ran above 220, my track is small and Iīm easy with the throttle since Iīm not expert.

Seisick

i set the epa on the radio to be open 1/4, and believe me this is the 7th engine that Iīve done running in and never happened something like this

jag

I still have the stock crank in mine but I have only run a few tanks after the break-in so I have been very easy on it. I heard that the material used was too brittle and they were breaking. Keep me/us posted on your progress. I don't know if all of the cranks will eventually fail or if they just didn't want to take anymore chances.

BTW, I got my replacement crank last week. I think I like the looks of the old one better.

roadrage

iTrader: (14)

are they going to come out with a new batch zx12 motors that have all the problems fixed? because i dont want to get one and the con. rod breaks on me.

speedy100

i got the new crank last week but there is one turbo scoop, the original crank had 3 scoop i remember. don't know if any difference in the performance wise.............

speedy100

1FastSerpent,

I heard many good things about the 0.12, they say this motors has tones of power and it is fastest. yes, this motor need a harder spring to obtain better perfromance in the bottom.

1FastSerpent

iTrader: (1)

Roadrage,
I think the conrod issue with the above guy was a freak thing. Too many of us here in Fl. Are running these 12 Mega motors with NO problems at all. ( Other then the too much torque on the bottom =) . If you run the Forgass series, just ask anyone who is runing it , what they think.

Speedy100,
Your right on about the scoops in the 21 replacment crank. The replacment crank is just that, a replacment. Alot of differences in the intake timming & ventury hole ( center of crank ). Compared to the first cranks, But i Did run the new crank this past weekend and it wasn't too bad. Little soft on top end but not bad.

teammpp

Wonder where they the standard ones or the special black cases ones some of the team drivers have been spotted with

roadrage

iTrader: (14)

[QUOTE]Originally posted by 1FastSerpent
[B]Roadrage,
I think the conrod issue with the above guy was a freak thing. Too many of us here in Fl. Are running these 12 Mega motors with NO problems at all. ( Other then the too much torque on the bottom =) . If you run the Forgass series, just ask anyone who is runing it , what they think.

thanks for the info mark,couple questions:
.how long have you been using your motor,and is it the factory con rod?
.and above i herd you are using thr 950r clutch sping. how is it compared to the stock? thanks

Pyramid

You mean Palmaris Engine will never have any future improvement as they never testing any prototypes? Please clarify your posting. Thx

NetBike

I suspect that too since the publicly available engine set doesnt impressed me in any sense. I think I should save my money for something better.

Seisick

[QUOTE]Originally posted by roadrage
[B][QUOTE]Originally posted by 1FastSerpent
[B]Roadrage,
I think the conrod issue with the above guy was a freak thing. Too many of us here in Fl. Are running these 12 Mega motors with NO problems at all. ( Other then the too much torque on the bottom =) . If you run the Forgass series, just ask anyone who is runing it , what they think.

I agree, something happened and that is why serpent us asked me to send the engine, itīs under warranty and I agree, that engine is fast, Iīll let know what happend when serpent usa sends me back the engine with an explanation. anyway powerpack 12 race legal is on the way!

1FastSerpent

iTrader: (1)

Roadrage,
I have been using my Mega 12 since the winternats. And we have raced 3 other races since then. So I have about 1 gallon on the motor now. As far as the factory rod. Yes the motor is box stock. no mods no nothing. Same type of off the shelf motor you or joe blow would receive.
As far as the clutch spring . the one which comes with the 710 standered ( in the box ) is a tad bit soft for the torque of the new mega 12. you have to tighten it too much to make it have the snap off the corner you need. By tightening it so much , you end up with coil bind. and you will acually hear the motor ( double clutching) off the corner. I use the 950r spring set at .9 mm . Seems to really work well. We are racing in lakeland this weekend. I'll see ya if ya show up.