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Post by supascoot on Jul 2, 2019 10:00:42 GMT -5
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Post by 90GTVert on Jul 2, 2019 11:17:25 GMT -5
That's badass Randall! Please share all of the details, or as much as you're comfortable telling us. You have our attention!  |
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Post by 190mech on Jul 2, 2019 11:51:17 GMT -5
COOL! Glad to see some off the beaten path builds!!Would love to see your plans for a crankshaft,perhaps a Gilera runner long stroke unit would fit the bill,looks like you are going to bolt it to an existing case,is it machined for the adaptation?  |
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Post by SMALL CC TEK on Jul 2, 2019 14:03:03 GMT -5
Nice let's see more !
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Post by ryan_ott on Jul 2, 2019 15:06:56 GMT -5
I’m intrigued!
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Post by Jwhood on Jul 2, 2019 16:10:55 GMT -5
Will u being doing the casting yourself or will u be out sourcing it, Very interesting
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Post by tsimi on Jul 2, 2019 17:34:25 GMT -5
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Post by supascoot on Jul 2, 2019 17:39:13 GMT -5
COOL! Glad to see some off the beaten path builds!!Would love to see your plans for a crankshaft,perhaps a Gilera runner long stroke unit would fit the bill,looks like you are going to bolt it to an existing case,is it machined for the adaptation? Havent got there yet. Going to machine my own. It will use 3 bearings. 2 on the drive side, 1 in the orig mina location and 1 up against the crank cheek. And you guessed it, I have machined case down and am bolting it together, located by the original crank bore and bolted using original bolts plus a few, reed cage bolts and centre stand bolt. Cant successfully weld this crap,just turns into a bubbly fused mess. Oh and using a conrod from a yamaha kt100 kart engine as I got a few for free so that limited my stroke to 49mm to keep a viable rod ratio. |
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Post by supascoot on Jul 2, 2019 17:41:05 GMT -5
Will u being doing the casting yourself or will u be out sourcing it, Very interesting I'm going to attempt myself. Most will be straight forward enough but the cylinder, that's another level lots of cores. See how I go. |
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Post by 190mech on Jul 2, 2019 19:14:53 GMT -5
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Post by supascoot on Jul 2, 2019 19:36:43 GMT -5
I checked out your thread. I've done a crank similar to that before. I shrunk them on, then a small tig weld around the inside. Probably do something similar for this build.   |
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Post by 190mech on Jul 3, 2019 7:49:57 GMT -5
Nice work!What kind of material were the crank wheels made from?
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Post by supascoot on Jul 3, 2019 8:26:00 GMT -5
Nice work!What kind of material were the crank wheels made from? On that motor nothing special just "1045" still going , was concerned it may not hold the crank pin. New one will be 4140, probably overkill but hey I got it on hand |
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Post by 190mech on Jul 3, 2019 10:20:50 GMT -5
Yes,the 4140 would be my choice..The Yamaha crank wheels were super hard and required tiny cuts to keep tool bits intact,most of the guru builders talk of EDM to bore crank pin holes..
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Post by jackrides on Jul 3, 2019 11:25:00 GMT -5
Those are beautiful pieces. How are you going to handle the intake?
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