Thread: '92 rebuild
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Old September 4th, 2021, 11:20 AM   #11
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

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MOTY - 2018, MOTM - Nov '17
That's way too much power to charge battery, may have fried it. Typically want to charge at 0.1 capacity or less than 1-amp. Measure voltage of battery to determine if it's fully charged and holding.


Compression looks pretty good for bike that's been sitting for 10-yrs, eh? This is gauge-pressure, so no need to subtract 1atm=14.5psi @ sea-level. Will be better with warm engine and WOT.

Try squirting some PB-Blaster in to free up rings, crank 2-3x and let sit for 4-5hrs. Then re-do compression test with WOT.


While waiting, inspect cam-timing and valve-clearance adjustment. With wear & tear, valve clearance decreases and prevent valves from closing fully. Lowers compression and risks frying exhaust valves. Looks like you may have caught it in time if you adjust now.

For exhaust pipe clamp with bolt as shim, you can just replace with hose clamp.


Most likely carbs will need complete disassembly down to every last nut, bolt and individual components for restoration to factory fresh clean. Scrub out all secret hidden petrol passages. Ultrasonic soak and micro soda-blast. Search for "clean carbs ducatiman" for similar threads with photos!


Coming along nicely and awesome job! I love to see these fun bikes restored and used instead of going to crushers. They're so much fun!

Last futzed with by DannoXYZ; September 4th, 2021 at 12:59 PM.
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