Since a SHIFT UP high compression piston kit was installed, the oil pump was also replaced accordingly.
SHIFT UPBrand's Oil pump was already discontinued, but Takegawa's product was still available, so we used this one.
The compression ratio is much higher (50cc→75cc, 10.0:1→11.7:1), and the engine is used to the extent that it is designated as a high-octane engine, but the engine did not break even after 8 hours of driving at 12,000 RPM for a round trip of less than 500km.
(Oil cooler is not used. Silkolene's Pro4XP is used and only this oil pump is used for cooling system)
The OEM oil pump needs to be removed for installation, but the dish screw that holds it in place is a challenge.
I tried to turn the bolster part of the KTC driver with Glasses, but instead of loosening, the tip of the driver's blade broke.
After that, I did some TRY with Torch and Shock driver, but after a few minutes it became too much of a hassle and I destroyed it with Drill and replaced it.
Since it is necessary to perform drilling on the crankcase in the Oil line's expanded Large process anyway, I thought it would be better to destroy the dish Screw by drilling from the beginning.
The work of expanding and loosening the oil line was too troublesome to do below the waist, so I had to pull out the oil and remove only the clutch cover.
I wonder how many people Rose to below the waist and assemble, but you are on your own for side dressing.
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