Timing Tolerance. WOW that's a country mile.

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Coyote
Moto GP
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Joined: Tue Oct 21, 2008 2:41 pm
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Suzuki 2-Strokes: GT550x2, GT750, GS1000
Location: Tulsa, Oklahoma

Timing Tolerance. WOW that's a country mile.

Post by Coyote »

When I bought my current GT550 I was given a Suzuki published 550 service manual. I was flipping through it and happened upon the timing procedure.. It says the timing marks on the casting are for emergency purposes only. A dial gauge must be used, Well OK. It gives the spec at 3.37mm (.132) BTDC. But then it goes on to give a tolerance on that spec.of 2.85mm (.112) to 4.24mm (.170). WOW! That's a lot! A difference of 1.39mm (.058)) I would be willing to bet good money that the casting marks are well within that range.
None of this has any particular importance. I was just amazed at the tolerance.
I was born with nothing and still have most of it left.

.
1978 GS1000C
1976 GT550 ongoing money pit.
Craig380
Expert racer
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Joined: Mon Dec 01, 2008 2:52 am
Location: Manchester, UK

Re: Timing Tolerance. WOW that's a country mile.

Post by Craig380 »

It is very wide tolerance, I guess it shows that Suzis are not fussy about the timing being spot-on, unlike rival brands :)
1976 GT380 - wounded by me, and sold on
2006 SV650S - killed by a patch of diesel and a kerb in Feb 2019
2017 SV650 AL7 - naked and unashamed
GT750Battleship
Road race school
Posts: 841
Joined: Tue Feb 19, 2013 2:45 am
Country: Australia
Suzuki 2-Strokes: Suzuki GT750A 1976
Location: Sydney New South Wales

Re: Timing Tolerance. WOW that's a country mile.

Post by GT750Battleship »

8) Hi,very under stressed motors,low state of tune..so you can get away with a lot,& they still run fine,electronic ignition helps "a lot" have noticed marked improvement with my GT750A since fitting the Accent System :up:
Cheers,
Roger
GT750Battleship.
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