octanehuffer

I can see what appear to be several flat spots from the transition of the base circle to almost peak on the lobe.

w8ye

My Feedback: (16)

If you plan on usig that engine much, I would consider a new cam and lifters.

Another thing about a high time engine is that you should look under the tips of the rocker arms on the valve end. You will find little sockets worn into the rocker arm which will make it impossible to get a good valve lash setting with a feeler gauge. If you are observant, you can reface these old rocker arm tips on a nice grinding wheel by hand.

Inspect the tips of the push rods for pitting.

Compare the valve adjuster screws. One that is down too close to the jam nut means there is something short? Push rod, lifter, racker arm tip, valve stem?

The valve tips get peened over also. When this happens, you cannot get the spring retainer washer up off the valve nor get the valve out of the head. You have to take a small hone stone and dress the flange off the valve stem to get them apart.

spaceworm

Note the distinction between "sealed' and "shielded". Sealed means a rubber sealed bearing that is permanently lubricated. This seal causes some drag and power loss. The shielded bearings are not sealed and induce less (no?) friction losses. However, I think convention in Saito engines is to not use either sealed or shielded bearings for the rear.

octanehuffer

I should have said the "rear bearing must be open".

octanehuffer

Saito 100 twin rear bearing has 61901HZ on it. Measures 23.98x 11.98x 5.97

Hobbsy

My Feedback: (102)

If you rounded it off it is this 24x12x6 at BOCA, there are variations in style, just choose.

http://www.bocabearings.com/bearing-...6901ZZ-12x24x6

octanehuffer

Thats too bad. No ceramic. Oh well.

w8ye

My Feedback: (16)

Those dimensions are for a 6901 bearing

RC bearings has it in Stainless Steel but not ceramic $6.49

http://www.rc-bearings.com/catalog/p...roducts_id=673

The front bearing is a 608-2RS and RC bearings has it in ceramic $9.69

http://www.rc-bearings.com/catalog/p...roducts_id=552

frets24

My Feedback: (15)

Here are some of an FA-130T:

SigMan

My Feedback: (21)

Happy Halloween Friends !

hsukaria

I took my son trick or treating this evening, we got a lot of candy, but nobody gave out any Saito engines.[&o]

Kostas1

Very very nice pictures.

Do you have a diagram of what's inside the camshaft housing;

frets24

My Feedback: (15)

I can scan the parts breakdown/exploded view later today. Unless someone beats me to it.

FNQFLYER

While I haven't actually used them yet Wolf Models have some you beaut "flick" type switches that I will be using with my FG Saitos. The O/T (Vintagents guys) are using them (well some are) with great success.

the pope

Howdy there FNQ had a quick look on their website, those switches look realy nice. Does anybody in Aus. sell them? Does anyone have any negative things to say about them ? Pretty good price as the JR switches are about that price. I cant say a bad thing about the jr ones , I havent tested the one in my crash yet, so it maybe O.K. Cheers from the Pope.

Kostas1

That, would have been awesome!

frets24

My Feedback: (15)

Kostas,

Here are the manual breakdown scans. If the basis of your inquery is because you are wondering how the air pump works; it is basically like a bicycle pump where the cam drives the pump piston one way and a return spring drives it the other way.

Cheers!

w8ye

My Feedback: (16)

Here's the Saito four stroke opposed twin manual

There three different basic designs

http://www.horizonhobby.com/ProdInfo...oke_Manual.pdf

Kostas1

Thank you so much....

Let me ask,

someone has posted how you calculate the mass of the connecting rod, piston pin etc
so that these will eventually balance the mass of the crankshaft.

How can i find it again?

w8ye

My Feedback: (16)

You mount the connecting rod on two scales or at least with the beam center line level. Get the weight of each end of the rod.

Then obtain the full weight of the piston, ring, wristpin, circlips.

In calculating your needed counterbalance weight, use half the weight of the big end of the rod, and all the weight of the little end of the rod, the piston, ring, wrist pin, and circlips.

Craig 01

Ballance within an engine is always a compromise and never exact.
The less vibration period is best placed where the engine does its most work, outside of that above and below expect excessive vibration,it is a narrow rpm where an engine will seem sweet with regard to vibration.
w8ye has given you good advice as to where to start.
Me thinks a lot of experiment to follow to get where one is happy

hsukaria

Regarding the balancing of a single, wouldn't Saito already balance the engine for general purpose use? So this discussion of balancing relates to balancing at max rpm for speed applications?

flycatch

My Feedback: (26)

I'm installing a Saito 1.8FS inverted into a ESM Hawker Hurricane. The fuel tank location in this configuration is above the fuel inlet on the carburator. The engine is equipped with an OEM fuel pump assembly. What problems can I exspect in this configuration? I'm running two other Saito engines side mounted with the fuel tanks below the fuel inlet and have no problems with this set-up.

w8ye

My Feedback: (16)

The Saito factory fuel pressurization adapter is generally hard to adjust. If you do get it running correctly, the second you change a parameter like taking off into the air, the thing is out of adjustment again.

This system is easier to use . . .

http://www3.towerhobbies.com/cgi-bin...&I=LXDG61&P=ML

flycatch

My Feedback: (26)

Are you speaking from experience or have you been a whitness to this happening? The biggest problem with this system is getting the pressure adjustment correct. I should have asked is fuel siphoning is a problem due to the relationship of tank height above the carburetor.