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Old 10-30-2011, 08:47 PM
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I can see what appear to be several flat spots from the transition of the base circle to almost peak on the lobe.
Old 10-30-2011, 09:35 PM
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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.
Old 10-31-2011, 05:18 AM
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ORIGINAL: octanehuffer

.... According to the ''Everything Saito'' thread, it is stated that there must never be a sealed bearing in the rear. ...
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.
Old 10-31-2011, 06:09 AM
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I should have said the "rear bearing must be open".
Old 10-31-2011, 07:12 AM
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Saito 100 twin rear bearing has 61901HZ on it. Measures 23.98x 11.98x 5.97
Old 10-31-2011, 07:31 AM
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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
Old 10-31-2011, 09:12 AM
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Thats too bad. No ceramic. Oh well.
Old 10-31-2011, 09:24 AM
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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
Old 10-31-2011, 01:58 PM
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ORIGINAL: Kostas1

Hi.

Can i see a real life picture of the camshaft housing of an opposed cylinder Saito;
Either of the 100, 130, 270 or 300;

Here are some of an FA-130T:
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Old 10-31-2011, 03:58 PM
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Happy Halloween Friends !
Old 10-31-2011, 04:24 PM
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I took my son trick or treating this evening, we got a lot of candy, but nobody gave out any Saito engines.[&o]
Old 10-31-2011, 07:42 PM
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Very very nice pictures.

Do you have a diagram of what's inside the camshaft housing;
Old 10-31-2011, 09:31 PM
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I can scan the parts breakdown/exploded view later today. Unless someone beats me to it.
Old 10-31-2011, 11:03 PM
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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.
Old 11-01-2011, 12:18 AM
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ORIGINAL: 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.
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.
Old 11-01-2011, 02:44 AM
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ORIGINAL: frets24

I can scan the parts breakdown/exploded view later today. Unless someone beats me to it.
That, would have been awesome!
Old 11-01-2011, 05:06 PM
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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!
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Old 11-01-2011, 07:30 PM
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Here's the Saito four stroke opposed twin manual

There three different basic designs

http://www.horizonhobby.com/ProdInfo...oke_Manual.pdf
Old 11-01-2011, 10:12 PM
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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?
Old 11-02-2011, 02:56 AM
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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.
Old 11-02-2011, 05:41 AM
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Default RE: Welcome to Club SAITO !

ORIGINAL: 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?
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
Old 11-02-2011, 06:04 AM
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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?
Old 11-02-2011, 03:38 PM
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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.
Old 11-02-2011, 04:31 PM
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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...XDG61&P=ML
Old 11-02-2011, 05:29 PM
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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.

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