Thanks cdelong, please confirm so i can buy them. What about the .12 con-rods? .. 359 and 353 rods are hard to get where im from , so i just need options.

same goes for the 353. the crank pin is slightly smaller than that of the regular Plus 12-3 engines

Anyone know the difference on the version 2 of the 353? Thanks.

The mounting point on the case have been slightly changed so it would fit into that XRay car

Rods
 

359 crank pin dia. is 4.45 mm ( P1 rod # 07011 )

35+ LC crank pin dia. is 4.71 mm ( C1 rod # 07010 )
I undestand that the LC/WC has a C2 on the rod with part # 07010/1

Original & current 35 Plus 21 uses a (R7 rod # 07009) with a crank pin dia. of 4.99 mm ( R4, R5 & R6 rods will also work )


.12 353 Race ( rod # 07602 )

.12 Plus 12-3SCT (rod # 07601)

does anyone know the difference in performance between the +12 sct and +12ct. i know the sct has a bigger crank. which engine has better performance?
thanks in advance

neither is better neither is worse. the ct has more bottom end and torque while the sct has a smoother powerband and more top end. I dont think that the CT comes with the rubber seal at the head button, which is a plus because dirt doesnt go that way.

I was told they were both the same speed wise.

the crank diameter changes... so I guess it changes somewhere in the powerband.

nova NS12 S3
 

after almost 15 tanks my NS12 S3 is still hard to fire up, piston still tight. guess i need to add few more tanks before it get less tight.

anyway, i find there is "freeplay" where the cranksahaft moves horizontally in and out after i install the cone+flywheel ( this before i started to break in process) ,i have tried a few times to reinstall but still the same:weird: is this normal or factory defects. but it idle and run normal.
thanks

A smaller crankpin will give a lower surface speed on the pin at the higher revs. That will give less friction and also a better lubrication.

He means the crank itself, the sct has a 11.9 mm crankshaft and the ct a 11.5 mm crankshaft. he want's to know what difference that make's
The inner diameter doesn't change because it's restricted.
The only thing that can make a difference are the smaller bearings used which are lighter, also the crank should have less flex so higher rev's.

Only the 353 race has a smaller crankpin, that's why it hase it's own special conrod's.

o-ring replacement - help please :)
 

is there a technique on how to replace the o-rings for the high and low end needles? im afraid i might rip up the o-rings because theyre a tight fit :sweat: i just ripped up a couple while removing them, and now im about to install new ones, but they are so difficult to put it :( any help would be greatly appreciated, thanks :)

What header is recommended for the 2602 pipe when using on the plus 12-3?

when you take the needles totally out, it's best to change the o rings as the act of taking htem out will sheer some rubber of them.

if you are rushed for time, and have no o rings, use some plumber's teflon thread tape, make sure you position it so it does not interfere with the needles pasage though.