{"id":5355,"date":"2025-11-15T09:57:11","date_gmt":"2025-11-15T00:57:11","guid":{"rendered":"https:\/\/www.decoboco.info\/en\/?p=5355"},"modified":"2026-09-24T13:46:34","modified_gmt":"2026-09-24T04:46:34","slug":"gsf1200-yoshimura-st-1-cam-oil-cooled-maintenance","status":"publish","type":"post","link":"https:\/\/www.decoboco.info\/en\/20251115\/everyday-events\/gsf1200-yoshimura-st-1-cam-oil-cooled-maintenance","title":{"rendered":"The epitome of violent naked bikes? GSF1200 Yoshimura ST-1 cam oil-cooled maintenance optical axis adjustment bracket fabrication and more"},"content":{"rendered":"\n
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Good morning (*\u00b4\u03c9\uff40*)
Riding a bike on a sunny day really does feel great!

So now we’re going to install the Yoshimura ST-1 cam to unleash the true output of this oil-cooled 1200.<\/p>\n\n\n\n

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Decoboco’s other BLOG.
“RURAL GARAGE<\/strong>“<\/span>

A secret room for non-bike content.
Sharing everyday convenience items, relocation, delicious food, life philosophy<\/strong>and more.<\/span>
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\n\t\t\t\t\t\n\t\t\t\t\t\tYoshimura oil-cooled 1200 camshaft! YOSHIMURA motorcycle ST-1 camshaft for Bandit1200 (00\u201305), GS1200SS (01\u201305), GSF1200 (95\u201305), Inazuma1200 (98\u201399) Part number: 211-111-0101\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t
moto-zoa \u697d\u5929\u5e02\u5834\u5e97<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tYahoo!\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\tDiscontinued: Oil-cooled 1200 is this! Advantage FCC Traction Control Clutch Kit GSF1200\/GS1200SS\/Bandit1200\/Inazuma1200\/GSX-R750\/RF900RR Type-D 214-S0230-05\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tYahoo!\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\"\"\n\t\t\t\t\t\u30dd\u30c1\u30c3\u30d7<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n\n
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The Yoshimura ST-1 lets the oil-cooled 1200 show its true colors<\/h2>\n\n\n\n
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The oil-cooled 1200 engine had its top-end punch dulled by the cam characteristics.
To put it another way“the tachometer climb and speed don’t sync up”<\/strong>is how I’d describe it.
With the Yoshimura ST-1 installed, the engine speed climb and vehicle speed sync up nicely.

Crack the throttle and it accelerates hard\u2014that’s what a true oil-cooled bike feels like.<\/p>\n\n\n\n

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We’re going to make the cam sprocket adjustable with elongated holes<\/h2>\n\n\n\n
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You don’t need to elongate the holes that much\u2014just enough to adjust between the lobes is fine.
I still remember back in the day when someone told me to elongate the sprocket holes with a file!

This Hayabusa sprocket is easy, but GSX-R sprockets are all hardened, so it’s a pain.
I have a distant memory of it taking a whole day just to elongate two sprockets…
The Yoshimura ST-1 is so precise that sometimes you get the exact spec without any modification.
But the world isn’t that kind, so we elongate the holes on every bike.<\/p>\n\n\n\n


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