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Old 01-11-2019, 02:10 AM
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It helps when reading the manual if you've had previous experience reading 70's era translated spanish to english trials bike manuals


Originally Posted by Glowgeek
I ran the 82 again today. To my surprise (not really) the intake valve wasn't leaking before the start up but did start leaking once up to running temp. I let it sit for a few hours and the leaking stopped. I started it up and no leaking even when up to temp (again, not surprised). I have found the perfect fix, I put a new fa82 on order. That said, I feel like giving it one more shot so I threw in a set of springs on the engine order. I really don't think the springs will fix it but what the heck, shipping was free and Jim told me to. Lol, just kidding Jim.

Hey, thanks to all here who contributed, I really appreciate your expertise and patience.
A pity we are all not standing around the bench while you run it...no wait,that could be bad depending on whose drunk the most.The first fa82 was my learning engine years ago and suffered from my learning curve so much that it makes my face go red just thinking about it.Out of the three i own it still pulls the best max rpm,maybe it was the no run in period...
Old 01-11-2019, 02:48 AM
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Originally Posted by the Wasp
so it leaks when it gets hot ! did you check this when the engine was shut off, I mean, if the engine is hot and not running and you turn it over by hand and the valve leaks I would think the spring is not the problem here, so this brings me back to the Seat




hey, I got patience but no expertise, but your welcome anyways
Jim

Never rule out the obvious; "loses compression when hot"?
Any time compression changes with warm up, check the valve lash.
Old 01-11-2019, 03:22 AM
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Originally Posted by Jesse Open



Never rule out the obvious; "loses compression when hot"?
Any time compression changes with warm up, check the valve lash.
Thanks, the lash was reset after break in of the new cam and tappets. This engine just runs crappy whenever it feels the urge to leak through the int valve. I've only seen an intermittent valve leak on full size engines when the valve was sticking, the guide was worn or the seat was cracked. Other than that a valve either seats or it doesn't in my limited experience. Maybe this 82 is just possessed. Next time it decides to leak I'll check the lash to see if the int valve is sticking.

EDIT: The thing is, if the valve is sticking it may be unmeasureable. Either the leak is not there at all or it's a slight hissing sound with a noticeable drop in compression when rolling the engine over. If the valve is sticking it would be very near the fully seated position and likely the lash difference would measure in 1/10ths. I'd have to do it entirely by feel.

Last edited by Glowgeek; 01-11-2019 at 03:44 AM.
Old 01-11-2019, 05:05 AM
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That is the exact point:
A sticking valve will show up in the valve lash setting Any change that would affect running would very, very likely be reflected in the valve lash . .

Why simply assume and utter " The thing is, if the valve is sticking it may be unmeasureable " ? Not at all a reasonable diagnostic pattern. Better to check and know. A .0002" change would NOT make a radical difference of the type you describe.



This isn't rocket science

Like Joe Friday said: "Just the FACTS Ma'am"
Old 01-11-2019, 09:04 AM
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just my fact at this moment LOL, for now I would just start that thing, run it up to 6 or 7 grand and let it set running like that for a good half hour, then after the half hour go over and bring it up to full throttle and see what happens, then if it starts it's thing again check the lash

Jim
Old 01-11-2019, 09:33 AM
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Originally Posted by Rudolph Hart
It helps when reading the manual if you've had previous experience reading 70's era translated spanish to english trials bike manuals

A pity we are all not standing around the bench while you run it...no wait,that could be bad depending on whose drunk the most.The first fa82 was my learning engine years ago and suffered from my learning curve so much that it makes my face go red just thinking about it.Out of the three i own it still pulls the best max rpm,maybe it was the no run in period...
Pete, over the years I have heard many people say that about their dirt bikes and how they run strong, and as for the ring I have read and heard many engine builders say the ring seat's instantly, even Baxter from OS Engine Service has said that in a RCU post, so maybe it is the thing to do for the brake in. these guys run in a brand new 800 HP Chevy on the DynO for 20 minutes to brake in the new Cam, then go to full throttle,, my friend Jack that has built many hundreds (maybe more) of oval engines in his 40 years of building them>, when I asked him about that he just said "yeeaa, that's when a engine has it's most power",, today when I think about when Jack said that I wonder if he was quietly trying to tell me something.. never the less, no mater how you brake in the ring and bearings, the cam needs care..

maybe I will try that with my Saito 100, what the Hey, I didn't pay full price for it ,, run it for 15 minutes at 4 grand, then bring it up to 6 grand for 10 minutes then full throttle, you never know till you do it LOL

Jim
Saito engine guys have the secret

Last edited by the Wasp; 01-11-2019 at 09:36 AM.
Old 01-11-2019, 03:55 PM
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Default Saito secrets revealed?

Anyone seen this?
https://www.rcgroups.com/forums/showpost.php?p=11548587&postcount=20

Last edited by Glowgeek; 01-11-2019 at 04:18 PM.
Old 01-11-2019, 04:58 PM
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Yep,

Our customers took our engines out of the shop and straight int use. Race car or street car.

We cut seats with Hall Toledo or Souix seat grinders later with Kwik-way cutters, never lapped them. Honed cylinders to size with a Sunnen CK10 and modern rings sealed well.


I put new engines in planes and fly them.

Hopefully our friend gets his engine sorted out without spending twice the price of a new engine

Last edited by Jesse Open; 01-11-2019 at 05:09 PM.
Old 01-12-2019, 06:44 AM
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???
Old 01-12-2019, 08:32 AM
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Maybe I'm doing things all wrong but I just carefully heat the prop drive washer and press the crank out. Go ahead and flame me but I've never had an issue.
Old 01-12-2019, 08:34 AM
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Originally Posted by Jesse Open
???
Correct, wrong channel, my bad.
Old 01-12-2019, 12:06 PM
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Hey Gary ??? : )

did you send that Carb yet ??? : )

I can wait, but just wondering !

Jim
Old 01-12-2019, 04:08 PM
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Originally Posted by the Wasp
Hey Gary ??? : )

did you send that Carb yet ??? : )

I can wait, but just wondering !

Jim

Jim,

I just took a large pile of freebies to the Post Office today, Parts I made and a Super Tigre carb. Saturday is about the only chance I get since the PO is closed at the end of my 12 hour workday this time of year.

Anyhow, I took your last message to mean you didn't want it, that is why I ended my response the way I did.

Okay, I will dig it out and ship it next Saturday, sorry about the confusion.
Old 01-12-2019, 06:24 PM
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Gary, no problem there, you are good with me! I remembered that PM, and that is one reason why I asked,

BTW, can you give me an suggestion where to buy tools, I need a new set of Calipers, 1/4x32 Tap, a Drill to go with it, a couple End Mills, and a couple #1 screwdrivers, and smaller Center Drills,, I found all that stuff at Wholesale Tools, but they don't have many Calipers in the price line I want to spend

thanks
Jim
Old 01-12-2019, 06:56 PM
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Are you talking about "Wholesale Tool Supply" on Stephens Rd, Warren MI?
Old 01-12-2019, 07:02 PM
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Originally Posted by Jesse Open
Are you talking about "Wholesale Tool Supply" on Stephens Rd, Warren MI?

yes,
they sent me a catalog, I received it today

Jim
Old 01-12-2019, 07:05 PM
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why, is that were you work LOL

Jim
Old 01-12-2019, 07:13 PM
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Nope, Don't work there but I have spent a LOT of money there since 1972!
Old 01-12-2019, 07:16 PM
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Just about three miles from Metal Specialists Inc, where I did work back then. Visited there almost weekly.
Old 01-12-2019, 07:17 PM
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LOL OK, so you like the place, I have bought there,, once,

anyhoo, they really don't have a lot of calipers, but if I have to spend an extra $20 and get every thing I need in one place, so be it for the exra $20

Jim
Hey, I'm a Saito man
Old 01-12-2019, 07:24 PM
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well, they have that 1/4X32 Tap I need for mounting those regulators,, yes I bought a 2nd one, if I can get $40 plus shipping for the carbs that came with them that means I paid $40 for each regulator

but that deal for the Carb and regulator is not up and going any more, Towers has stopped that deal, but you can still get the OS 4-stroke regulator for like $70

Jim
Old 01-12-2019, 07:27 PM
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it's a funny thing in how OS used a standard thread on their Crbs, now I got to figure out what there hose barb tread is

Jim
Old 01-12-2019, 07:54 PM
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oo Saito friends, if you need one, if you want one,, looky here

https://www.towerhobbies.com/cgi-bin...?&I=LXYYS7&P=7

Jim
Old 01-13-2019, 02:44 AM
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Jim, I get all most of my small tools here. But only since 1990: https://www.micromark.com/
Old 01-13-2019, 06:29 AM
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Well here’s a little eye candy.
Nothing like a Saito powered Astro Hog

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