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

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.

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 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.

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 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.