r/Trackdays • u/Rampartt '08 Daytona track bike, R1250GSA • 5h ago
Rest easy, Daytona 675 🫡
On track, it suddenly was down on power, came into the pits and it sounded like a 2cyl. Came home, took the valve cover off, and found the top of the bucket had broken into bits and the wall of it stayed intact, falling to the bottom of the spring. You can see some chunks of it. Boroscoped the cylinder & I’m staring at the top of that exhaust valve, so it dropped a valve too. Drained the oil and… voila. That’s the end of it.
It had UKRS springs, that’s all I know. The bike ran like shit originally. Stator and rectifier shorted to ground, brake lines kinked, rearsets bent, midpipe kinked, MC failed. Finally got that all fixed, then this happens. 🤷♂️ Oh well
Anyone got a first gen 675 motor in New England? In the meantime, I just picked up a 765 to finish the season.
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u/torqu3e 2h ago
Apparently the best setup build for these is a 765 motor in the 675 frame, look up Tony Scott to get some ideas. Just my 2 cents from the very lil I know about them except being a really sweet motor.
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u/doodydoo333 1h ago
Correct, except the 765 is prone to overheating. Need to run a very rich tune and a large or auxiliary radiator.
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u/doodydoo333 1h ago
OP I believe I know of a 1st gen motor in PA. Shoot me a PM and I’ll forward his info.
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u/punisherASMR 28m ago
Sheeeeesh. I've got a first gen 675 plus a parts bike I've been thinking about getting rid of, but I'm in the opposite corner of the country 🥲
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u/SierraHotel84 5h ago
Oh no, time for a super stock build!