Saito fa-90r3 - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-08-2011, 08:07 PM   #11
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Re: Saito fa-90r3

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Just a thought - was the engine ever disassembled? It may gave been put back with a timing gear off by a tooth, perhaps just on 1 cylinder (perhaps it was even assembled wrong at the factory). I'm not familiar with the multi-cylinder models, but the single cylinder ones have a small mark on the cam gear that lines up with a mark in the crankshaft gear.

If you don't already have it, there is a great book from RCM plans on Saito 4-strokes by Graham Rice, that shows how to disassemble, service and re-assemble them. It was written in the 90's, so it pre-dates the triple cylinder models, although the basic single-cylinder designs have not changed much.
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Old 08-15-2011, 04:35 AM   #12
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Re: Saito fa-90r3

Guys at at my club have some of these and tell me they need nitro to run properly, 10-15%, they say it aids the burning of the fuel that seems to gather in the lower cylinder.
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