Mr 650 wrote on 12/31/69 at 16:00:02:Thanks Woody congrats on the rebuild!
The bike bandit photo incorrectly shows an old 2-valve piston! That's why the HD boys needed to add another jug!
I was interested in the fact that you ran through the clutch.
Was this w/ new clutch springs and discs installed w/ the rebuild?
Also, I noticed while surfing for parts that the 650 called for the same clutch spring as my '83 750 and several others.
I suspect that Suzuki 650 may share more components among other models, if that nice Barnett kit fails to contain your new found torque.
You know, I looked for a piston kit last year. I think I saw this one, on Bike Bandit, but I don't recall seeing it in the Wiseco book.
So I went back and it was listed w/ the dirt bike stuff under the DR 650 (like we got knobby tires
)
It appears to be an 8.5:1 kit in the catalog, page 7 -
http://www.wiseco.com/PDFcatalogs/ps04-suzuki.pdfI would like to bump the compression up a point. Did Wiseco mention anything about the ratio in your kit?
Did some calculations myself, with the additional volume obtained from the cavities in the top of the Wiseco piston and the oversize cylinder volume, the compression ratio worked out to essentially the same i.e. 8.5:1, also checked with Wiseco tech at the time and they confirmed this, thus no need to change camshaft timing
I have pics of the actual piston if you wish to see them.
I'm not sure how to publish them in this forum.
Sorry I forgot to answer your question re: the clutch - During the rebuild I checked all clutch components i.e. friction disc thicknesses, spring free length, drive discs, and they were all within Suzuki's tolerances, I got the slippage using the original clutch. This only happened the one time I tried it, there is a possibility that I had not let the machine warm up enough to operating temperature when I gave her a shot. Will definitely get some answers and solutions when this snow dissappears!
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