thanks for the reply DOC...
no..i did not put any after run oil at any period...
btw do u happen to know the exact diameter of the crankshaft pin?

i was thinking the same too, i am running the gammalube 25%....
maybe its time to switch to another fuel...

thanks MANINTHEMUGEN...

No I don't. sorry

Need help here, is anybody tried put in 3port PS into TzR 5p cranckcase ? Any good ?

YEP
works awesome, runs much cooler and tonnes faster due to the 5p bigger crankshaft. make sure to use the black 5.4mm carb insert to stay legal

Thanks mrgsr... ..

front bearing is 7x17x5 part 697
rear bearing is 12x21x5 part 6801

the ntn work ok for me, I replace both bearings every two gallons, just in case

nm

well i've got hold of them after 2 months of searching , put in the motor and they last the whole day of racing (inc. a 30 min. final) after i dissammble and check for any free play...and all are still tight

Active Hobby of Japan have announced that they will be selling this new cooling for both O.S. TZ12 and .12 Novarossi based engines. Its super lightweight, keeping the cars center of gravity low, and is deisgned in such a way as to improve the air flow and cooling around the engine head, while the colour coating is very efficient at dispersing heat. Available in matt red, matt blue (above) and gun metal grey.

Source: Active Hobby [active-hobby.com]

looks sweet, where can I get active hobby stuff in the USA?

Usually i barely overtake anyone on the straight but yesterday was an exception with my TZ3(6 races old)+720(1st race)+Nova 2630+16%fuel , i think it was very fast on the straight,easily overtaking or coming up fast behind other drivers actually the tz must have been quite leantwice i blew the glowplug during the mains, i did notice very little smoke coming out, but what the heck the acceleration, mid and top speed was awesome:

Check and see if your piston and head is pitted, you might have been running with too much compression

Guys try to use C3 tolerance. This bearing will have a greater inner tolerance, this will help when the bearing works hot, it will maintain a good tolerance. Im talking of the toleranceof the balls and race.
bocabering have some literature about the tolerance, it a good reading.

Have fun

pitted??....i was using 16% nitro with 0.35 head shims and P6 glowplug.

FYI top of piston and under the button head was already full of tiny black spots all over even b4 race day ( 2 days b4 the race i ran the engine without knowing the backplate screws were not tightenthe plug coil was missing when i unplug the glow).......if u ask me why i still use this engine for d race...well i said to myself if i gonna blow up this motor might as well do it in the race( actually was keeping my better engine for the next race)