OS 12 TzR
01-04-2007, 06:52 PM
#1426
Originally Posted by THE DOCTOR
I think that it would be time for a new rod but not the crank. You should get another 3-4 L out of it. Are you putting after run oil in after each race day?
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?
01-04-2007, 06:56 PM
#1427
Originally Posted by MANINTHEMUGEN
what fuel you running? i think the oil in it is whats giving you that color inside the motor.i run byrons,and after 2-3 gallons my motor is nice and clean inside.
maybe its time to switch to another fuel...
thanks MANINTHEMUGEN...
01-04-2007, 11:47 PM
#1429
Tech Elite
Need help here, is anybody tried put in 3port PS into TzR 5p cranckcase ? Any good ?
01-05-2007, 01:19 AM
#1431
Tech Elite
Originally Posted by mrgsr
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
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
.. 
01-05-2007, 03:03 AM
#1432
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
rear bearing is 12x21x5 part 6801
the ntn work ok for me, I replace both bearings every two gallons, just in case
05-08-2007, 02:59 AM
#1434
Originally Posted by Seisick
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
rear bearing is 12x21x5 part 6801
the ntn work ok for me, I replace both bearings every two gallons, just in case
, 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 
05-11-2007, 05:50 AM
#1435
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]
05-11-2007, 09:03 AM
#1436
looks sweet, where can I get active hobby stuff in the USA?
07-15-2007, 08:32 PM
#1437
TZ3 story
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:
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:
07-16-2007, 03:43 AM
#1438
Check and see if your piston and head is pitted, you might have been running with too much compression
07-16-2007, 07:04 AM
#1439
Tech Regular
bocabering have some literature about the tolerance, it a good reading.
Have fun
07-17-2007, 02:18 AM
#1440
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 tighten
the 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)