My new Saito 100 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 10-06-2004, 08:13 PM   #1
Donkey Doctor
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My new Saito 100

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Hello; I just recieved my new Saito 100 on Monday, I read the book, and oiled the engine and turned the carb around. While I had the rocker covers off I noticed that the valve setting was pretty tight, in fact the clearance was 0. I set the valves using the tools that came with the engine at .04 mm.

Today I bolted it into my Funtana to break it in and took it out to my shop and fired it up. It started up right away and put out a cloud of exhaust. I took it outside and ran out the tank. The second tank through it I leaned it out until the smoke lessened a bit, I found i could idle it down so that it would sit there, and didn't have to be held.

I'll run another tank through it tonight, but I think it's pretty good, quiet. I don't expect it to idle all that well yet. I was skeptical at first of the little muffler, but it's pretty quiet, and makes a nice sound.

I'll check the valves again after I have an hours running time on the engine, like it says in the manual, and report back then.
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Old 10-07-2004, 07:55 AM   #2
Gary Maker
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I am: Gary M.
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I have never adjusted the valves before running the first time on any of the dozen or so Saitos that I have purchased over the last 10 years.

Saito recommends not even touching the valves until you have at least two full hours of running on thier engines. There is a good reason for this!

Part of the natural break-in is getting the rings, valves and other internal parts seated and broken in during the first two hours of running! Had you run the engine as recommended and then checked the valves you would have found that they properly gapped themselves after seating and the rocker arms loosened up etc.

I have Saito engines that are 5 or more years old that run like the day they were purchased and have NEVER touched the valves uness there was a problem with one of the valves sticking, which is rare anyway!

Unfortunitely, now you are going to HAVE to fiddle with the valves cause you will find that you've reset them now and you will HAVE to do it again when things loosen up. If you do reset them after an hours running, then again, you will have to do it again after 2 or 3 hours of total running

You know, the old addage is very wise: If it ain't broke, don't fix it!

Anyway, good choice of engines. I just purchased the same engine but the Golden Knight version! Hoping it comes in before the weekend and I am putting it on an Hangar 9 Ultra Stick and would like to fly it on Saturday!
Stoney Creek Hawks RC
MAAC No. 43659

Radios used: Spektrum DX6i
Current builds: 1/4 scale J3 Cub & Neiuport 17 and KMP B-25.
Currently flying: Scratched Tele 40, Parkzone Stryker & 60" SPAD Debonaire


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Old 10-07-2004, 08:26 AM   #3
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I check my Saito's after 3 hours run time. Only once I've had to adjust one valve on a .91.

They run like a dream most times but it doesn't hurt to at least check as per instructions.

Bob D.
Ajax RC Club
Indoor Aero-Choppers
Member of MAAC since I joined

Lighten Up, Life is waaaaaayyyy too short
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Old 10-07-2004, 12:18 PM   #4
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I am not sure why but it seems that whenever a new engine is purchased, nobody actually follows the manufacturers break-in instructions. I have a Saito 72 that I purchased new. I broke the engine in exactly by the book and it has worked flawlessly ever since. If you read the instructions you will see that it tells you to run the engine as rich as you can get it at no more than 4000 rpm for atleast 30 mins. (atleast it does with my 72) I ran mine at 3000 as rich as i could get it for 45 mins without leaning it out just to be safe.
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Old 10-10-2004, 11:13 PM   #5
Donkey Doctor
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Hello; I think I am finished breaking it in onw. Iput two tanks through it today, I adjusted teh low speed nearly 3 turns in, then a third af a turn richer on the main needle. Now it runs great. Idles steadily at 2000 rpms turns 9700 on a 15 x 4W. I'll fly it in my new Funtana next weekend, weather permitting.

I'll take my big Bingo to the lake tomorrow, Saito 80, I better charge it up.
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