Performance Engine Bearings ??

[PUTT'IN'PTOWN]

HI: All was wondering anybody know where,to get best bearings for 66/80
engines not the so called imported one on most of the kit selling sites I
mean some real good mabe ceramic if not to expensive?? Also i dont have
a micrometer yet just a plastic cheapo dose not measure what i need!!
Can someone please tell me the exact sizes of main & counter shaft bearings
Iner & outer diameters? where to get some super quality bearings??? I would be exstatic!!! Im going to port &
polish rest of motor transfer ports etc! new gaskets line up bearings exactly
exactly with two halfs of block!! there is a guy tells how to do really easy
just takes time patience ! elbo grease he reminded me of old trick!!
makes alot of difference a few small things add up quikly makes everthing
silky smooooth!! YEPERRSS THANK YOU !!! IF ANYONE CAN HELP?

 

[DougC]

I don't have one of those engines to look at myself, but anyway-

......the engines are almost certainly made with metric measurements, and the bearings are probably standard sizes. Most metric bearings are made on the even-mm so measuring them is usually pretty easy even with just a ruler. For example: they will either be 15mm or 16mm O.D., but aren't very likely to be 15.75mm O.D.

......if you are in the USA, you can get bearings online. Bocabearings and VXB are two places, but most of what they have is generic Chinese (they do have ceramics though). eBay is a good place to check, very often you can find name-brand bearings on there for less than what other places sell generics for.

....in terms of quality from lowest to highest, they are carbon steel, stainless, hybrid and ceramic. The black ceramics are usually better than the white ceramics.

Most bearings will have an ABEC rating http://en.wikipedia.org/wiki/ABEC_scale. It is a rating for mechanical fit and play, it doesn't cover everything but it is a decent guideline. A higher ABEC rating is better--try to get ABEC 9's if you can.

~

 

[a/c man]

An engine is only going to be as good as the weakest part of it.
Notoriously the majority of failures in these"toy"engines is going to be the
bottom end connecting rod bearings or the wrist pin bearings.
They have a tendency to self-destruct long before the main crank bearings.
This is due to the sloppy tolerances manufactured into the bottom and top end.
The crankshafts are out of true and not well engineered to be balanced running under high rpm's either.
Your efforts are better spent looking for better upper and lower caged needle bearings for the con. rod.
They are the loosiest goosiest hunks of doo doo in the engine.
I wish I could steer you in the right direction where to get some decent upgraded ones, but I don't know of any...

TIM

 

[PUTT'IN'PTOWN]

HEY : Someone actually answered!! THANKS ALOT GUYS!!! i apreceiate
your info!! I saw that boca bearing place & was wondering if i could cross
referance some bearings probably can the ceramic one sound like the way if
there not 60$ apeace yeh about the rod bearings I have not yet took
my motor down that far yet!! goin to definetly do the piston mod take off
1/4 inch where it bloks intake!! already did intake & exahst wow i did not
beleave the diff At first i thought i srewed it up cuase it was not starting
the first time it turned out it was the coili took it out and kleened & put back
and the blue wire got almost severed so i all most had to take the bus
home but i fugured it out All why i was on the road i allways cary all tools
with me & a pump thank god for that i was able to just twist a loop
around the soldered part and get me home boy when i rewired it
man the differance was incredible!!! Just did a carburator mod hope it
works!! i drill out a hole that was pluged up from factory!! dont know what
it will do if nothing can allways cover up!!


thank you Kindly Ride em fast
Stay safe!!!! Puttin